Co-reporter:Lei Wang;Nhat Truong Nguyen;Xiaojuan Huang;Patrik Schmuki
Advanced Functional Materials 2017 Volume 27(Issue 46) pp:
Publication Date(Web):2017/12/01
DOI:10.1002/adfm.201703527
AbstractEfficient charge separation and transport as well as high light absorption are key factors that determine the efficiency of photoelectrochemical (PEC) water splitting devices. Here, a PEC device consisting of a hematite nanoporous film deposited on Pt nanopillars, followed by the decoration with an Fe2TiO5 passivation layer, is designed and fabricated. This structure can largely improve the light absorption in the composite materials, and significantly enhance the water oxidation performance of hematite photoanodes. The Fe2TiO5 thin shell and Pt underlayer significantly improve the interfacial charge transfer while minimizing the hole-migration length in Fe2O3 photoanodes, leading to a drastically increased photocurrent density. Specially, the Fe2TiO5/Fe2O3/Pt photoanode yields an excellent photoresponse for PEC water splitting reactions with 1.0 and 2.4 mA cm−2 obtained at 1.23 and 1.6 VRHE under AM 1.5G illumination in 1 m KOH. The resulting photocurrents are 2.5 times enhanced compared to a pristine Fe2O3 photoanode of the same geometry. These results demonstrate a synergistic charge transfer effect of Fe2TiO5 and Pt layers on hematite for the improvement of PEC water oxidation.
Co-reporter:Qizhao Wang, Jijuan He, Yanbiao Shi, Shuling Zhang, Tengjiao Niu, Houde She, Yingpu Bi
Chemical Engineering Journal 2017 Volume 326(Volume 326) pp:
Publication Date(Web):15 October 2017
DOI:10.1016/j.cej.2017.05.171
•Bi metal deposition film was obtained firstly by photo-assisted reduction method.•The usage of Bi particles has overcome the bottleneck of expensive cost.•Bi/BiVO4 photoanode exhibits excellent photoelectrocatalytic performance.Bi/BiVO4 photoelectrode was prepared on FTO glass by the combination of electrochemical deposition, heating treatment and photo-assisted reduction method at room temperature. All of the samples were characterized by X-ray diffraction spectrum (XRD), scanning electron microscope (SEM) and UV–vis diffuse reflectance spectrum (DRS), respectively. The results indicated that metallic Bi particles were well deposited on porous BiVO4 film during the deposition process of photo-assisted reduction, resulting in a greatly broadened visible light absorption edge than that of BiVO4 alone. The optimized photoelectrochemical (PEC) performance of Bi/BiVO4-60 was further verified by linear scan voltammetry (LSV), current-time (I-t) and incident photon-to-current efficiency (IPCE), respectively. It was conjectured the broadened visible light response range of Bi/BiVO4 PEC system and the increased counteraction against positive charge both were caused by the electron transferred from BiVO4 to Bi, and thus effectively facilitated the separation and transfer of photo-generated carriers and thus promote the PEC water splitting performance.Download high-res image (142KB)Download full-size image
Co-reporter:Qizhao Wang, Jijuan He, Yanbiao Shi, Shuling Zhang, Tengjiao Niu, Houde She, Yingpu Bi, Ziqiang Lei
Applied Catalysis B: Environmental 2017 Volume 214(Volume 214) pp:
Publication Date(Web):5 October 2017
DOI:10.1016/j.apcatb.2017.05.044
•Leaf-like BiVO4 film was acquired by regulating the electrolyte concentration during the preparation process of the Bi precursor film.•NiFe2O4 and CoFe2O4 nanoparticles were firstly deposited on leaf-like BiVO4 film by electrophoretic deposition technology.•MFe2O4/BiVO4 (M = Ni, Co) photoanode exhibits superior PEC hydrogen activity than pure BiVO4.The leaf-like structure BiVO4 electrode and MFe2O4/BiVO4 (M = Ni, Co) composite photoelectrodes were prepared by electrochemical deposition, ensuing heating treatment and electrophoretic deposition technology. The characterizations of SEM, XRD and DRS indicated that the BiVO4 derivatives mainly existed in small nanoparticles with monoclinic phase and exhibited stronger light absorption capability than that of pure BiVO4. Hereon, the respective photoelectrochemical (PEC) activities of BiVO4 and its derived composites were systematically studied. The results suggested that the NiFe2O4/BiVO4 and CoFe2O4/BiVO4 not only showed higher photocurrent response values at 1.23 V vs. NHE than pure BiVO4 electrode under visible light illumination, but also played a superior PEC hydrogen evolution performance, which was considered owing to their strong absorption to light, reduction combination of carriers and effective separation of electrons and holes.BiVO4, BiVO4/NiFe2O4 and BiVO4/CoFe2O4 photoelectrodes are used to photoelectrocatalytic water splitting.Download high-res image (204KB)Download full-size image
Co-reporter:Xiaogang Liu
RSC Advances (2011-Present) 2017 vol. 7(Issue 16) pp:9902-9907
Publication Date(Web):2017/01/30
DOI:10.1039/C6RA28533C
A facile in situ synthetic strategy has been developed to prepare highly active oxygen-deficient anatase TiO2 microsphere single crystals with modified {001} facets by simply controlling the hydrothermal reaction time. More importantly, on investigating the performance of photocatalytic hydrogen evolution, TiO2 microspheres consisting of micro-decahedrons with etched {001} facets show superior photoreactivity compared with TiO2 microspheres wrapped with intact-{001} faceted anatase crystals. As determined by electron spin resonance (ESR) measurement, short hydrothermal reaction time facilitates the formation of oxygen vacancies, whereas longer hydrothermal reaction time contributes to the decrease of oxygen vacancies and formation of subsurface Ti3+ defect states. Based on the PL emission spectra obtained at different excited wavelengths, a possible mechanism of charge separation and transport resulting from changing of bulk/surface trapping sites on the building blocks of TiO2 microspheres is proposed, and the enhanced photocatalytic efficiency of the as-prepared TiO2 microsphere is largely attributed to the efficient separation and transport of photogenerated charge carriers caused by rational surface modulation and modification.
Co-reporter:Guojun Dong;Yajun Zhang
Journal of Materials Chemistry A 2017 vol. 5(Issue 39) pp:20594-20597
Publication Date(Web):2017/10/10
DOI:10.1039/C7TA06225G
Herein, we demonstrated the controllable fabrication of Bi2WO6 nanoplate arrays decorated with Co3O4 cocatalysts through the combination of hydrothermal reactions with annealing treatments. The synergistic effect of bulk charge transport and surface oxygen evolution could significantly improve the photoelectrochemical properties (0.45 mA cm−2, 1.23 VRHE) for water splitting under simulated solar light, which are much higher than those of traditional Bi2WO6 particle photoanodes (0.02 mA cm−2, 1.23 VRHE). These demonstrations clearly reveal that the rational construction of a photoanode structure and selective decoration of oxygen evolution cocatalysts could serve as an alternative strategy toward the development of highly efficient water splitting systems.
Co-reporter:Beibei Zhang;Guojun Dong;Lei Wang;Yajun Zhang;Yong Ding
Catalysis Science & Technology (2011-Present) 2017 vol. 7(Issue 21) pp:4971-4976
Publication Date(Web):2017/10/30
DOI:10.1039/C7CY01765K
Photoelectrochemical (PEC) water splitting to produce hydrogen energy has attracted considerable attention for solving current energy and environmental crises. However, the intrinsically high electron–hole recombination and low charge mobility greatly diminish the PEC efficiency. Herein, we demonstrated that metal organic framework MIL-53(Fe) could serve as an efficient hole-transfer co-catalyst to significantly improve the PEC performance of Mo-doped BiVO4 photoanodes toward water oxidation under solar irradiation, which is much higher than that of the traditional FeOOH co-catalyst under the same conditions. More specifically, owing to the unique 3D interlinked nanochannel and confinement effect of Fe atom sites, the charge separation, hole transport at the interface, and interactions with H2O molecules have been effectively facilitated, which thus allows for enhancing PEC water oxidation properties.
Co-reporter:Zhengbo Jiao, Mingdong Shang, Jiamei Liu, Gongxuan Lu, Xuesen Wang, Yingpu Bi
Nano Energy 2017 Volume 31() pp:96-104
Publication Date(Web):January 2017
DOI:10.1016/j.nanoen.2016.11.026
•The different roles of Bi and Bi2O3 in photocatalytic process are firstly investigated.•The charge transfer pathway of Bi loaded TiO2 is clearly studied by in situ XPS method.•It is proved that the improvement of TiO2 PEC performances originate from the SPR of Bi.•It is proposed that the energy of immigrant electrons and self-excited ones are different.The surface of Bi nanoparticles would be oxidized to amorphous Bi2O3 layer with thickness about 7 nm in the air. Until now, it is still unclear about the different roles of Bi and Bi2O3 in the photocatalysis when Bi nanoparticles are deposited on semiconductors. In this work, Bi nanospheres have been decorated on the top aperture of TiO2 nanotube arrays by vapor deposition method, and an X-ray photoelectron spectroscopy combined with synchronous illumination technique is applied to explore the charge transfer mechanism. Under visible light, the electrons generated from the surface plasmon resonance of Bi would transfer to the conduction band of TiO2 first, and then migrate to the oxide surface of Bi2O3 and reduce it to metallic Bi. During this process, TiO2 serves as a “charge-transfer-bridge” and the reductive reaction would not occur in the absence of it. And the energy of the immigrant electrons differs from the self-excited ones, which can not trigger the reductive reaction. These findings have resolved the puzzles about the utilization of Bi, and figured out the different roles of Bi and Bi2O3 in the photocatalytic process. Furthermore, the photoelectrochemical activities of Bi modified TiO2 nanotubes arrays have been systematically explored and it is found that the photocurrent of TiO2 nanotube arrays could be significantly improved due to the surface plasmon resonance of Bi as well as the optimized charge transfer and transport characteristics.
Co-reporter:Wei Wang;Yajun Zhang;Lei Wang
Journal of Materials Chemistry A 2017 vol. 5(Issue 6) pp:2478-2482
Publication Date(Web):2017/02/07
DOI:10.1039/C6TA10308A
We demonstrated a facile and effective method to fabricate nanoporous FeVO4 photoanodes for efficient solar water splitting. More importantly, the rationally self-doped Fe2+ or Fe3+ on the FeVO4 photoanode could further improve the photoelectrochemical (PEC) performance, which may provide an alternative approach for the design and construction of low-cost and highly efficient PEC systems.
Co-reporter:Lei Wang, Hongyan Hu, Nhat Truong Nguyen, Yajun Zhang, Patrik Schmuki, Yingpu Bi
Nano Energy 2017 Volume 35(Volume 35) pp:
Publication Date(Web):1 May 2017
DOI:10.1016/j.nanoen.2017.03.035
•First report of plasmon-induced hole-depletion layer on Fe2O3 photoanodes.•A high photocurrent of 3.2 mA cm-2 at 1.23 VRHE is obtained for Fe2O3/FeOOH/Au.•Charge separation has been elucidated by a synchronous illumination XPS.•technique.•It provides a novel concept toward the design of solar water splitting systems.The efficiency of photoelectrochemical (PEC) water splitting of semiconductors is mainly restricted by the sluggish kinetics of the oxygen evolution reaction dominated by photogenerated holes. Herein, we demonstrate that with the assistance of photon-induced surface plasmon resonance excitation of Au nanoparticles, the iron oxyhydroxides (FeOOH) cocatalysts could serve as a unique “hole-depletion” layer for significantly promoting the PEC performance of single crystalline α-Fe2O3 photoanodes. The photogenerated holes can be efficiently extracted from α-Fe2O3 nanoflake to FeOOH layer, and promptly depleted by the injected hot-electrons from Au nanoparticles, while the hot-holes left behind on Au participate in the oxygen evolution reaction. Accordingly, the synergy of charge separation and hole transfer could be efficiently improved by the surface plasmon excitation on Au nanoparticles. As a result, the photocurrent density for the Fe2O3/FeOOH/Au photoelectrode without additional doping reaches up to 3.2 mA cm−2 at 1.23 VRHE, and 6.5 mA cm−2 at 1.6 VRHE, with a low onset potential of 0.6 VRHE under AM 1.5 G simulated sunlight, which is 2.5 and 5 times higher than for FeOOH modified and pristine α-Fe2O3 photoanodes, respectively. These results thus provide the basic of a new concept and strategy toward the design of more efficient PEC water splitting systems.The FeOOH with the assistance of photon-induced surface plasmon resonance excitation via Au nanoparticles serves as a “hole-depletion” layer for significantly promoting the PEC performance of α-Fe2O3 nanoflakes. The photogenerated holes could be efficiently extracted from α-Fe2O3 to FeOOH layer and promptly depleted by the injected hot electrons from Au, efficiently enhancing charge separation and facilitating water oxidation.Download high-res image (387KB)Download full-size image
Co-reporter:Lei Wang;Yang Yang;Yajun Zhang;Qiang Rui;Beibei Zhang;Zhiqiang Shen
Journal of Materials Chemistry A 2017 vol. 5(Issue 32) pp:17056-17063
Publication Date(Web):2017/08/15
DOI:10.1039/C7TA05318E
Charge separation plays a crucial role in determining the solar energy conversion efficiency of semiconductors for photoelectrochemical (PEC) water splitting. However, owing to the intrinsically high electron–hole recombination, the generally reported PEC performance is still far below that expected. Therefore, we have attempted to demonstrate that efficient charge separation can be achieved on the selective growth of spatial FeOOH cocatalyst and Pt nanoparticles on hematite photoanodes. Unlike traditional strategies – single cocatalyst decoration or element doping – this comprises an interfacial hole-transfer layer as the active sites (FeOOH) for water oxidation, and an electron collector and transfer layer (Pt) to facilitate water reduction. Here we demonstrate a simple but effective “bottom-up” method, combined metallic replacement with hydrolytic reactions, for the selective growth of the FeOOH cocatalyst (top) and Pt particles (bottom) on the hematite-nanoflake (NF) photoanodes. As expected, this novel FeOOH/α-Fe2O3 NF/Pt photoanode yields excellent photoresponse behavior for PEC water splitting reactions −2.0 mA cm−2 and 3.2 mA cm−2 obtained at 1.23 VRHE and at 1.5 VRHE under AM 1.5G illumination – which is much higher than the pristine hematite and/or exclusively FeOOH cocatalyst-decorated samples. These results demonstrate that selectively integrating electron and hole-transfer layers into photoanodes could effectively achieve spatial charge separation and greatly improve PEC performance for water splitting.
Co-reporter:Chenchen Feng, Zhonghao Wang, Ying Ma, Yajun Zhang, Lei Wang, Yingpu Bi
Applied Catalysis B: Environmental 2017 Volume 205(Volume 205) pp:
Publication Date(Web):15 May 2017
DOI:10.1016/j.apcatb.2016.12.014
•Ultrathin C3N4 nanosheets serve as efficient cocatalysts for photoelectrochemical water splitting.•The H2 generation capability is nearly 12 times with respect to the pristine BiVO4 photoanodes.•Ultrathin C3N4 could effectively transfer and store holes for water oxidation.•This work may provide an effective approach for enhancing photoelectrochemical properties.Here, we demonstrate that ultrathin graphitic-phase C3N4 nanosheets (g-C3N4-NS) could serve as an efficient metal-free cocatalyst for improving oxygen evolution activity on nanoporous BiVO4 photoanode. More specifically, as compared with pure BiVO4 photoanode, ultrathin g-C3N4 nanolayers not only suppress the surface charge recombination of BiVO4, but also effectively transfer and store holes for water oxidation. As expected, the ultrathin graphitic-phase C3N4 cocatalyst modified BiVO4 photoanode exhibited significantly improved photocurrent density and H2 generation capability, nearly 7 and 12 times with respect to the pristine BiVO4 under the same conditions. These results demonstrate an effective approach for the design and construction of low-cost and highly efficient PEC systems.Here, we demonstrate that ultrathin graphitic-phase C3N4 nanosheets (g-C3N4-NS) could serve as an efficient metal-free cocatalyst for improving oxygen evolution activity on nanoporous BiVO4 photoanode. More specifically, as compared with pure BiVO4 photoanode, ultrathin g-C3N4 nanolayers not only suppress the surface charge recombination of BiVO4, but also effectively transfer and store holes for water oxidation. As expected, the ultrathin graphitic-phase C3N4 cocatalyst modified BiVO4 photoanode exhibited significantly improved photocurrent density and H2 generation capability, nearly 7 and 12 times with respect to the pristine BiVO4 under the same conditions. These results demonstrate an effective approach for the design and construction of low-cost and highly efficient PEC systems.Download high-res image (242KB)Download full-size image
Co-reporter:Xiaogang Liu; Guojun Dong; Shaopeng Li; Gongxuan Lu
Journal of the American Chemical Society 2016 Volume 138(Issue 9) pp:2917-2920
Publication Date(Web):February 29, 2016
DOI:10.1021/jacs.5b12521
Synchronous illumination X-ray photoelectron spectroscopy (SIXPS) was employed for the first time to directly identify the photogenerated charge separation and transfer on anatase TiO2 single-crystals with selectively etched {001} facets. More specifically, for the TiO2 crystals with intact {001} and {101} facets, most of photogenerated charge carriers rapidly recombined, and no evident electron–hole separation was detected. With selectively etching on {001} facets, high efficient charge separation via hole transfer to titanium and electron to oxygen was clearly observed. However, when the {001} facets were completely etched into a hollow structure, the recombination for photogenerated electron–hole pairs would dominate again. These demonstrations clearly reveal that the appropriate corrosion on {001} facets could facilitate more efficient electron–hole separation and transfer. As expected, the optimized TiO2 microcrystals with etched {001} facets could achieve a hydrogen generation rate of 74.3 μmol/h/g, which is nearly 7 times higher than the intact-TiO2 crystals.
Co-reporter:Mingdong Shang, Hongyan Hu, Gongxuan Lu and Yingpu Bi
Journal of Materials Chemistry A 2016 vol. 4(Issue 16) pp:5849-5853
Publication Date(Web):28 Mar 2016
DOI:10.1039/C6TA00033A
We demonstrate that the hetero-coupling of SrTiO3 nanocubes on TiO2 nanotube arrays and Ti3+ dual-doping on both SrTiO3 and TiO2 could not only extend their photoresponse from the UV to visible light region, but also facilitate efficient charge separation and transfer between SrTiO3−x and TiO2−x. Moreover, their synergistic effects could substantially improve the photoelectrochemical (PEC) performance for water oxidation under visible light irradiation, which is 40 times higher than the PEC capabilities of pristine TiO2 arrays under the same conditions.
Co-reporter:Ying Ma, Yulong Jia, Lina Wang, Min Yang, Yingpu Bi and Yanxing Qi
Journal of Materials Chemistry A 2016 vol. 4(Issue 27) pp:10414-10418
Publication Date(Web):14 Jun 2016
DOI:10.1039/C6TA03003C
Novel three dimensional MoO2–graphene (MoO2–G) flower-like nanostructures are synthesized via a facile hydrothermal reaction. It has been shown that the MoO2–G demonstrates enhanced supercapacitive performance compared to pure MoO2 particles. The excellent electrochemical performance is attributed to the introduction of graphene and a hierarchical nanostructure, providing a large surface area and low equivalent series resistance.
Co-reporter:Shaopeng Li, Hongyan Hu and Yingpu Bi
Journal of Materials Chemistry A 2016 vol. 4(Issue 3) pp:796-800
Publication Date(Web):07 Dec 2015
DOI:10.1039/C5TA08720A
Herein, we demonstrate that quantum-sized Pd dot-decorated ultra-thin anatase TiO2 nanosheets with exposed (001) facets (2 wt%) exhibit a highly efficient catalytic activity for hydrogen generation from formaldehyde solution at room temperature, which is much higher than that of traditional Pd/TiO2 (Degussa P25) and pure Pd nanoparticles. By further optimizing the reaction parameters, the hydrogen generation rates could reach up to 250 mL g−1 min−1 and keep consistent for ten hours. Owing to its high efficiency and stability, this hydrogen production reaction may serve as an alternative technique for supplying hydrogen in practical applications.
Co-reporter:Dr. Ying Ma;Dr. Yulong Jia;Dr. Lina Wang;Dr. Min Yang;Dr. Yingpu Bi;Dr. Yanxing Qi
Chemistry - A European Journal 2016 Volume 22( Issue 17) pp:5844-5848
Publication Date(Web):
DOI:10.1002/chem.201504604
Abstract
Herein, porous Bi/Bi2MoO6 nanoparticles have been prepared by a facile in-situ reduction approach. Moreover, the morphology and Bi content of product could be controlled by varying the reaction time. By controlled fabrication, the desired porous Bi2MoO6 nanostructure with incorporation of Bi was obtained and exhibited high photoelectric and photocatalytic activity. In particular, the samples yield a photocurrent density of 320 μA cm−2, which is 3.2 times that of the pure Bi2MoO6 nanosheet (100 μA cm−2) under the same conditions. UV/Vis diffuse reflectance spectroscopy analysis confirmed the surface plasmon resonance in the as-prepared porous nanoparticles. The improved photoelectric properties could be the synergistic effect of the porous structure with large surface area and effective electron-hole separations between Bi and Bi2MoO6.
Co-reporter:Bingjun Jin, Zhengbo Jiao and Yingpu Bi
Journal of Materials Chemistry A 2015 vol. 3(Issue 39) pp:19702-19705
Publication Date(Web):09 Sep 2015
DOI:10.1039/C5TA05450H
We demonstrate a facile and effective strategy for in situ growth of Bi2MoO6 thin-nanosheets on well-aligned ZnO nanowires to construct novel hierarchical hetero-arrays, which exhibit excellent visible-light driven photoelectrochemical performances attributed to the highly efficient charge separation between Bi2MoO6 nanosheets and ZnO nanowires.
Co-reporter:Chenchen Feng, Zhengbo Jiao, Shaopeng Li, Yan Zhang and Yingpu Bi
Nanoscale 2015 vol. 7(Issue 48) pp:20374-20379
Publication Date(Web):12 Nov 2015
DOI:10.1039/C5NR06584D
We demonstrate a facile method for the rational fabrication of pore-size controlled nanoporous BiVO4 photoanodes, and confirmed that the optimum pore-size distributions could effectively absorb visible light through light diffraction and confinement functions. Furthermore, in situ X-ray photoelectron spectroscopy (XPS) reveals more efficient photoexcited electron–hole separation than conventional particle films, induced by light confinement and rapid charge transfer in the inter-crossed worm-like structures.
Co-reporter:Ying Ma, Yulong Jia, Zhengbo Jiao, Min Yang, Yanxing Qi and Yingpu Bi
Chemical Communications 2015 vol. 51(Issue 30) pp:6655-6658
Publication Date(Web):11 Mar 2015
DOI:10.1039/C5CC00634A
Herein, we demonstrate for the first time the fabrication of one-dimensional (1D) Bi2MoO6 inter-crossed nanosheet-built frameworks by using MoO3 nanobelts as the growth templates and molybdate source. Especially, this novel Bi2MoO6 framework structure exhibits remarkably enhanced photocatalytic activity toward the degradation of organic dyes under visible-light irradiation, far exceeding that of conventional Bi2MoO6 nanoplates and nanoparticles. The photoelectrochemical study suggests that the hierarchical framework structure could facilitate the photoinduced charge separation and transfer from the inter-crossed Bi2MoO6 nanosheets, which may make a significant contribution to the enhanced photocatalytic activity.
Co-reporter:Teng Wang, Bingjun Jin, Zhengbo Jiao, Gongxuan Lu, Jinhua Ye and Yingpu Bi
Chemical Communications 2015 vol. 51(Issue 11) pp:2103-2106
Publication Date(Web):17 Dec 2014
DOI:10.1039/C4CC09628B
We demonstrate a simple and effective strategy for vertically growing Au nanowires over ZnO nanowire arrays to construct a cross-linked hierarchical architecture under the synergistic effects of the electric field direction and photoreduction, which exhibit excellent photoelectrochemical performances under visible light irradiation.
Co-reporter:Ying Ma, Yulong Jia, Zhengbo Jiao, Lina Wang, Min Yang, Yingpu Bi, Yanxing Qi
Materials Letters 2015 Volume 157() pp:53-56
Publication Date(Web):15 October 2015
DOI:10.1016/j.matlet.2015.05.095
•We synthesized α-MoO3 nanobelts by hydrothermal treatment Na2MoO4 and HBF4.•In the reaction, HBF4 serves as a reagent to provide H+ and surfactant.•We proposed the possible mechanism of BF4− on forming of α-MoO3 nanobelts.•The nanobelts exhibit superior adsorption property for methyl blue.A simple approach is explored to synthesize orthorhombic MoO3 (α-MoO3) nanobelts using sodium molybdate (Na2MoO4) and fluoboric acid (HBF4). In the reaction, HBF4 not only serves as a reagent to provide H+, but also a surfactant to manipulate the morphology and crystalline phase of the as-prepared products. The results show that the as-prepared samples are MoO3 nanobelts with 300 nm in width, 50 nm in thickness and 2–5 μm in length. Moreover, the possible formation mechanism of α-MoO3 nanobelts with HBF4 is studied. Finally, devoted to the belt-like shape and high stability, the MoO3 nanobelts exhibit a good adsorption performance for methyl blue (MB).
Co-reporter:Hongchao Yu, Qingsong Dong, Zhengbo Jiao, Teng Wang, Jiantai Ma, Gongxuan Lu and Yingpu Bi
Journal of Materials Chemistry A 2014 vol. 2(Issue 6) pp:1668-1671
Publication Date(Web):03 Dec 2013
DOI:10.1039/C3TA14447J
PAN/Ag3PO4 core–shell hetero-nanofibers have been fabricated for the first time by combining electrospinning technology with ion exchange reaction, which exhibit much higher visible light driven photocatalytic activities for the degradation of organic contaminants than pure Ag3PO4 nanoparticles.
Co-reporter:Teng Wang, Bingjun Jin, Zhengbo Jiao, Gongxuan Lu, Jinhua Ye and Yingpu Bi
Journal of Materials Chemistry A 2014 vol. 2(Issue 37) pp:15553-15559
Publication Date(Web):28 Jul 2014
DOI:10.1039/C4TA02960G
Herein, we demonstrate that ZnO nanowire arrays could be rationally connected with each other by thin Au nanowires to construct a novel cross-linked hetero-structure by a simple photo-directed growth strategy. Moreover, a possible formation mechanism of this Au/ZnO hierarchical nanostructure has been proposed. In the case of light irradiation, the rapid electron enrichment on the top (002) facets of ZnO nanowires will result in a high concentration of holes on the side facets, which could generate a positive electric field. As a result of the electronegativity, [Au(OH)xCl4−x]− (where x = 0–4) anions could be pulled in by this electric field and reduced on the side facets of ZnO nanowires, and the Au nanowires could be gradually formed through an exact opposite point growth route. Furthermore, the photoelectrochemical performance studies clearly reveal that these novel cross-linked hetero-arrays exhibit much higher visible light photocurrent density than both pure ZnO nanowire arrays and traditional Au nanoparticle/ZnO nanowire heterostructures, which may be primarily ascribed to the efficient electron transfer from Au nanostructures to ZnO nanowires.
Co-reporter:Zhengbo Jiao, Yan Zhang, Shuxin Ouyang, Hongchao Yu, Gongxuan Lu, Jinhua Ye, and Yingpu Bi
ACS Applied Materials & Interfaces 2014 Volume 6(Issue 22) pp:19488
Publication Date(Web):November 7, 2014
DOI:10.1021/am506030p
We demonstrate for the first time that Bi and BiAg alloy nanospheres, fabricated with a facile hydrothermal method, display evident photocatalytic H2 production activities. Element Bi can serve as an active photocatalyst for both water splitting and photoelectrochemical applications. More interestingly, these activities of Bi can be greatly enhanced by introducing Ag to form BiAg alloy nanoparticles, which may be ascribed to the improved charge separation and enlarged carrier concentration. The constituent of the BiAg alloy can be rationally tuned by varying the amount of Ag nanowires, and it is found that Bi0.7Ag0.3 exhibits the highest photoelectrochemical property.Keywords: BiAg alloy; H2 evolution; nanospheres; photocatalysis; photoelectrochemical
Co-reporter:Qingsong Dong, Zhengbo Jiao, Hongchao Yu, Jinhua Ye and Yingpu Bi
CrystEngComm 2014 vol. 16(Issue 36) pp:8317-8321
Publication Date(Web):17 Jun 2014
DOI:10.1039/C4CE00916A
A hollow Ag@AgBr photocatalyst was obtained by a replacement reaction between Br− ions and solid Ag2CrO4 and a subsequent light-induced chemical reduction reaction. The photocatalyst exhibits very high photocatalytic activity for the degradation of organic contaminants under visible-light irradiation.
Co-reporter:Yawen Li, Tao Chen, Teng Wang, Yingpeng Zhang, Gongxuan Lu, Yingpu Bi
International Journal of Hydrogen Energy 2014 Volume 39(Issue 17) pp:9114-9120
Publication Date(Web):5 June 2014
DOI:10.1016/j.ijhydene.2014.03.257
•Using γ-Al2O3 as the carrier to prevent agglomeration of silver nanoparticles.•The capacity of silver to catalyze formaldehyde to produce hydrogen at room temperature has been improved.•The influence of reaction parameters on hydrogen production has been studied.Herein, we demonstrate a simple and efficient process for generating hydrogen from the formaldehyde (HCHO) aqueous solution catalyzed by Ag nanoparticles dispersed on high specific surface area γ-Al2O3 at room temperature. Moreover, this Ag/γ-Al2O3 catalyst exhibits much higher capability and stability for hydrogen production than unsupported Ag nanoparticles. By further optimizing the structure, component, and amounts of Ag/γ-Al2O3 catalysts as well as reaction parameters such as reaction atmosphere, formaldehyde concentrations, and NaOH concentrations, the hydrogen generation rate could be greatly increased and maintained for ten hours without any decay. It may provide a general and favorable strategy for the fabrication of highly reactive and stable metal catalyst for the hydrogen production from organic aldehyde solutions.
Co-reporter:Qingsong Dong, Hongchao Yu, Zhengbo Jiao, Gongxuan Lu and Yingpu Bi
RSC Advances 2014 vol. 4(Issue 103) pp:59114-59117
Publication Date(Web):16 Oct 2014
DOI:10.1039/C4RA09355K
One-dimensional Ag@TiO2 anatase core–shell nanowires are fabricated through a hydrolysis reaction and subsequent thermal-induced method. This photocatalyst exhibits much higher photocatalytic activities than Ag nanowires and TiO2 anatase nanoparticles under visible-light irradiation.
Co-reporter:Hongyan Hu, Zhengbo Jiao, Gongxuan Lu, Jinhua Ye and Yingpu Bi
RSC Advances 2014 vol. 4(Issue 60) pp:31795-31798
Publication Date(Web):04 Jul 2014
DOI:10.1039/C4RA04804K
Hierarchical Ag/AgCl hetero-structures have been fabricated in high-yield by copying the natural architecture of branches with green leaves, and exhibit higher photocatalytic activities than Ag/AgCl nanowires, AgCl nanoparticles, Ag nanowires, and N-doped TiO2 for the degradation of organic contaminants under visible light irradiation.
Co-reporter:Jinyan Xiong, Qingsong Dong, Teng Wang, Zhengbo Jiao, Gongxuan Lu and Yingpu Bi
RSC Advances 2014 vol. 4(Issue 2) pp:583-586
Publication Date(Web):05 Nov 2013
DOI:10.1039/C3RA46088F
Herein, we demonstrate for the first time the direct conversion of metallic Bi nanospheres into three-dimensional (3D) flower-like BiOBr nanoarchitectures at room temperature, which exhibited much higher photocatalytic performance for the photodegradation of organic dyes than 2D BiOBr nanoplates under visible light irradiation.
Co-reporter:Dr. Zhengbo Jiao;Dr. Yan Zhang;Tao Chen;Dr. Qingsong Dong; Gongxuan Lu; Yingpu Bi
Chemistry - A European Journal 2014 Volume 20( Issue 9) pp:2654-2662
Publication Date(Web):
DOI:10.1002/chem.201304135
Abstract
In recent decades, solar-driven hydrogen production over semiconductors has attracted tremendous interest owing to the global energy and environmental crisis. Among various semiconductor materials, TiO2 exhibits outstanding photocatalytic properties and has been extensively applied in diverse photocatalytic and photoelectric systems. However, two major drawbacks limit practical applications, namely, high charge-recombination rate and poor visible-light utilization. In this work, heterostructured TiO2 nanotube arrays grafted with Cr-doped SrTiO3 nanocubes were fabricated by simply controlling the kinetics of hydrothermal reactions. It was found that coupling TiO2 nanotube arrays with regular SrTiO3 nanocubes can significantly improve the charge separation. Meanwhile, doping Cr cations into SrTiO3 nanocubes proved to be an effective and feasible approach to enhance remarkably the visible-light response, which was also confirmed by theoretical calculations. As a result, the rate of photoelectrochemical hydrogen evolution of these novel heteronanostructures is an order of magnitude larger than those of TiO2 nanotube arrays and other previously reported SrTiO3/TiO2 nanocomposites under visible-light irradiation. Furthermore, the as-prepared Cr-doped SrTiO3/TiO2 heterostructures exhibit excellent durability and stability, which are favorable for practical hydrogen production and photoelectric nanodevices.
Co-reporter:Hongyan Hu, Zhengbo Jiao, Jinhua Ye, Gongxuan Lu, Yingpu Bi
Nano Energy 2014 Volume 8() pp:103-109
Publication Date(Web):September 2014
DOI:10.1016/j.nanoen.2014.05.015
•Pd nanotubes facilitate hydrogen generation from alkaline aldehyde solution.•The rates of hydrogen generation can be increased up to 170 mL g−1 min−1.•This hydrogen generation reaction may serve as a hydrogen supply candidate.Herein, we demonstrate that hollow Pd nanotubes could serve as a highly efficient and convenient catalyst for inhibiting Cannizzaro reaction and facilitating hydrogen generation from alkaline formaldehyde solution at room temperature. Moreover, this hollow nanostructure exhibits much higher capability and stability for hydrogen production than conventional Pd nanoparticles. By further optimizing the reaction parameters such as reaction temperature, formaldehyde concentrations, and NaOH concentrations, the hydrogen generation rates could be further increased. Moreover, except for formaldehyde, other aldehydes, including acetaldehyde, propanal, and benaldehyde, could also produce hydrogen with high efficiencies. Owing to its high efficiency at room temperature, this Pd nanotube based hydrogen generation reaction may serve as an alternate hydrogen supply candidate.Herein, we demonstrate that hollow Pd nanotubes could serve as a highly efficient and convenient catalyst for inhibiting Cannizzaro reaction and facilitating hydrogen generation from alkaline formaldehyde solution at room temperature.
Co-reporter:Hongyan Hu, Zhengbo Jiao, Hongchao Yu, Gongxuan Lu, Jinhua Ye and Yingpu Bi
Journal of Materials Chemistry A 2013 vol. 1(Issue 7) pp:2387-2390
Publication Date(Web):18 Dec 2012
DOI:10.1039/C2TA01151D
Tetrahedral Ag3PO4 submicro-crystals have been fabricated in high-yield by directly reacting commercial Ag foils with H2O2 and NaH2PO4 in aqueous solution at room temperature, which exhibit higher photocatalytic activities than Ag3PO4 cubes, particles, and N-doped TiO2 for the degradation of organic contaminants under visible light irradiation.
Co-reporter:Hongyan Hu, Zhengbo Jiao, Teng Wang, Jinhua Ye, Gongxuan Lu and Yingpu Bi
Journal of Materials Chemistry A 2013 vol. 1(Issue 36) pp:10612-10616
Publication Date(Web):19 Jul 2013
DOI:10.1039/C3TA12061A
Herein, we demonstrate a facile and general process for fabricating uniform and perfect Ag/Ag3PO4 core–shell coaxial hetero-nanowires at room temperature, which exhibit excellent photocatalytic activities for degradation of organic contaminants under visible light irradiation.
Co-reporter:Teng Wang, Zhengbo Jiao, Tao Chen, Yawen Li, Wei Ren, Shengling Lin, Gongxuan Lu, Jinhua Ye and Yingpu Bi
Nanoscale 2013 vol. 5(Issue 16) pp:7552-7557
Publication Date(Web):29 May 2013
DOI:10.1039/C3NR01459B
Herein, we demonstrate that uniform Ag nanoparticles could be directionally grafted on the tip of ZnO nanowire arrays by a simple photo-reduction method. Furthermore, the structure, position, and amount of Ag nanoparticles supported on ZnO nanowire arrays could be further rationally tailored by changing the reaction parameters such as the category, concentration of reagents, and annealing temperature. Moreover, their photoelectrochemical performances under both UV-vis and monochromatic light irradiation have been explored. Interestingly, the photocurrent density of Ag–ZnO heterostructures could reach up to 2.40 mA cm−2, which is much higher than that of pure ZnO nanowire arrays. It has been proposed that the formation of ZnO nanowire arrays tip-grafted with Ag nanoparticles could promote the effective separation and directional transfer of photoexcited electron–hole pairs, and thus enhance the photoconversion properties.
Co-reporter:Zhengbo Jiao, Yan Zhang, Hongchao Yu, Gongxuan Lu, Jinhua Ye and Yingpu Bi
Chemical Communications 2013 vol. 49(Issue 6) pp:636-638
Publication Date(Web):26 Nov 2012
DOI:10.1039/C2CC37324F
Herein, we demonstrate for the first time the fabrication of concave trisoctahedral Ag3PO4 microcrystals enclosed by {221} and {332} facets based on the heteroepitaxial growth procedure, which exhibit much higher photocatalytic activities than cubic Ag3PO4 and commercial N-doped TiO2.
Co-reporter:Hongchao Yu, Zhengbo Jiao, Hongyan Hu, Gongxuan Lu, Jinhua Ye and Yingpu Bi
CrystEngComm 2013 vol. 15(Issue 24) pp:4802-4805
Publication Date(Web):24 Apr 2013
DOI:10.1039/C3CE00073G
Necklace-like Ag3PO4–polyacrylonitrile (PAN) hetero-nanofibers have been successfully fabricated through a simple and facile electrospinning technique and exhibit excellent photocatalytic activities for the degradation of organic contaminants under visible light irradiation.
Co-reporter:Jinyan Xiong;Dr. Zhengbo Jiao; Gongxuan Lu;Wei Ren; Jinhua Ye; Yingpu Bi
Chemistry - A European Journal 2013 Volume 19( Issue 29) pp:9472-9475
Publication Date(Web):
DOI:10.1002/chem.201300384
Co-reporter:Yingpu Bi, Hongyan Hu, Zhengbo Jiao, Hongchao Yu, Gongxuan Lu and Jinhua Ye
Physical Chemistry Chemical Physics 2012 vol. 14(Issue 42) pp:14486-14488
Publication Date(Web):10 Sep 2012
DOI:10.1039/C2CP42822A
Two-dimensional dendritic Ag3PO4 nanostructures have been synthesized in high-yield by reacting Ag nanowires with H2O2 and NaH2PO4 in aqueous solution at room temperature, which exhibit much higher photocatalytic activities than irregular Ag3PO4 nanocrystals and N-doped TiO2 catalyst for the degradation of organic contaminants under visible light irradiation.
Co-reporter: Yingpu Bi;Hongyan Hu;Dr. Shuxin Ouyang;Dr. Zhengbo Jiao; Gongxuan Lu; Jinhua Ye
Chemistry - A European Journal 2012 Volume 18( Issue 45) pp:14272-14275
Publication Date(Web):
DOI:10.1002/chem.201201435
Co-reporter:Ying Ma, Zhonghao Wang, Yulong Jia, Lina Wang, Min Yang, Yanxing Qi, Yingpu Bi
Carbon (April 2017) Volume 114() pp:
Publication Date(Web):April 2017
DOI:10.1016/j.carbon.2016.12.043
•The Bi2MoO6 nanosheet array film with dominant {010} facets exposed was synthesized by a facile hydrothermal reaction.•The Bi2MoO6 array provides large surface, low resistance and exposed active surface, facilitating charge separation.•The array film was further modified with ultrathin graphitic carbon nitride to enhance the photoelectrochemical activity.•The Bi2MoO6-C3N4 electrode yields a photocurrent density of 520 µA/cm2, which is nearly 300 times that of Bi2MoO6 particles.We report a facile method to fabricate Bi2MoO6 nanosheet array exposed with {010} facets for the highly improved photoelectrochemical (PEC) property related to water oxidation. The nanosheet array film would provide large surface area, low resistance and exposed oxygen atoms, facilitating the electrons transport and charge separation. More importantly, the optimized Bi2MoO6 nanosheet array yields a photocurrent density of 220 μA/cm2, which is more than two orders of magnitude higher than that of conventional Bi2MoO6 particles (1.8 μA/cm2). Additionally, the nanosheet arrays were modified with ultrathin graphitic carbon nitride (g-C3N4) nanolayers as co-catalyst to enhance the photoelectrochemical activity. As expected, this unique photoanode yields a photocurrent density of 520 μA/cm2 at +0.8 V (versus SCE) under visible light irradiation, which is 2.3 times higher than the pure Bi2MoO6 nanosheet film. The origin of enhanced photoelectrochemical activity of the co-catalyst modified film may be due to the large surface area, oriented electrons transport pathways and improved charge separation. These demonstrations clearly reveal that the rationally fabricating of high photoactive nanosheet array and coating ultrathin cocatalysts may serve an alternate strategy toward the development of highly efficient photoanodes for water splitting.
Co-reporter:Zhonghao Wang, Guojun Zou, Wei Wang, Zhicheng Tang, Yingpu Bi, Xiaolai Wang
Journal of Power Sources (1 March 2017) Volume 343() pp:
Publication Date(Web):1 March 2017
DOI:10.1016/j.jpowsour.2017.01.035
•Simple one-pot annealing way to prepare α-Fe2O3 polyhedron.•High-index {116} facets exposed.•Melamine acts as solvent and coordination agent.•The as-prepared sample exhibits excellent PEC performance.Introducing high-index facet into crystals is a promising way to provide additional catalytically active sites for boosting intrinsic activity. This work presents a simple one-pot annealing way to fabricate highly photoactive pristine polyhedral α-Fe2O3 single crystal, using melamine as solvent and coordination agent. The HR-TEM results realized that the as-prepared sample was enclosed by high-index {116} facet, which was always not presented in traditional hydrothermal method. The photoelectrochemical (PEC) measurements have been carried out and showed that the polyhedron samples exhibited significantly enhancement in the photocurrent density, which is nearly 28 times higher than that of the α-Fe2O3 prepared without melamine under the same conditions. Our work may guide future designs for high-index crystal facet exposed of metal oxides and suggest paths for further improvements to allow technological development and use.
Co-reporter:Ying Ma, Yulong Jia, Zhengbo Jiao, Min Yang, Yanxing Qi and Yingpu Bi
Chemical Communications 2015 - vol. 51(Issue 30) pp:NaN6658-6658
Publication Date(Web):2015/03/11
DOI:10.1039/C5CC00634A
Herein, we demonstrate for the first time the fabrication of one-dimensional (1D) Bi2MoO6 inter-crossed nanosheet-built frameworks by using MoO3 nanobelts as the growth templates and molybdate source. Especially, this novel Bi2MoO6 framework structure exhibits remarkably enhanced photocatalytic activity toward the degradation of organic dyes under visible-light irradiation, far exceeding that of conventional Bi2MoO6 nanoplates and nanoparticles. The photoelectrochemical study suggests that the hierarchical framework structure could facilitate the photoinduced charge separation and transfer from the inter-crossed Bi2MoO6 nanosheets, which may make a significant contribution to the enhanced photocatalytic activity.
Co-reporter:Mingdong Shang, Hongyan Hu, Gongxuan Lu and Yingpu Bi
Journal of Materials Chemistry A 2016 - vol. 4(Issue 16) pp:NaN5853-5853
Publication Date(Web):2016/03/28
DOI:10.1039/C6TA00033A
We demonstrate that the hetero-coupling of SrTiO3 nanocubes on TiO2 nanotube arrays and Ti3+ dual-doping on both SrTiO3 and TiO2 could not only extend their photoresponse from the UV to visible light region, but also facilitate efficient charge separation and transfer between SrTiO3−x and TiO2−x. Moreover, their synergistic effects could substantially improve the photoelectrochemical (PEC) performance for water oxidation under visible light irradiation, which is 40 times higher than the PEC capabilities of pristine TiO2 arrays under the same conditions.
Co-reporter:Hongchao Yu, Qingsong Dong, Zhengbo Jiao, Teng Wang, Jiantai Ma, Gongxuan Lu and Yingpu Bi
Journal of Materials Chemistry A 2014 - vol. 2(Issue 6) pp:NaN1671-1671
Publication Date(Web):2013/12/03
DOI:10.1039/C3TA14447J
PAN/Ag3PO4 core–shell hetero-nanofibers have been fabricated for the first time by combining electrospinning technology with ion exchange reaction, which exhibit much higher visible light driven photocatalytic activities for the degradation of organic contaminants than pure Ag3PO4 nanoparticles.
Co-reporter:Bingjun Jin, Zhengbo Jiao and Yingpu Bi
Journal of Materials Chemistry A 2015 - vol. 3(Issue 39) pp:NaN19705-19705
Publication Date(Web):2015/09/09
DOI:10.1039/C5TA05450H
We demonstrate a facile and effective strategy for in situ growth of Bi2MoO6 thin-nanosheets on well-aligned ZnO nanowires to construct novel hierarchical hetero-arrays, which exhibit excellent visible-light driven photoelectrochemical performances attributed to the highly efficient charge separation between Bi2MoO6 nanosheets and ZnO nanowires.
Co-reporter:Teng Wang, Bingjun Jin, Zhengbo Jiao, Gongxuan Lu, Jinhua Ye and Yingpu Bi
Journal of Materials Chemistry A 2014 - vol. 2(Issue 37) pp:NaN15559-15559
Publication Date(Web):2014/07/28
DOI:10.1039/C4TA02960G
Herein, we demonstrate that ZnO nanowire arrays could be rationally connected with each other by thin Au nanowires to construct a novel cross-linked hetero-structure by a simple photo-directed growth strategy. Moreover, a possible formation mechanism of this Au/ZnO hierarchical nanostructure has been proposed. In the case of light irradiation, the rapid electron enrichment on the top (002) facets of ZnO nanowires will result in a high concentration of holes on the side facets, which could generate a positive electric field. As a result of the electronegativity, [Au(OH)xCl4−x]− (where x = 0–4) anions could be pulled in by this electric field and reduced on the side facets of ZnO nanowires, and the Au nanowires could be gradually formed through an exact opposite point growth route. Furthermore, the photoelectrochemical performance studies clearly reveal that these novel cross-linked hetero-arrays exhibit much higher visible light photocurrent density than both pure ZnO nanowire arrays and traditional Au nanoparticle/ZnO nanowire heterostructures, which may be primarily ascribed to the efficient electron transfer from Au nanostructures to ZnO nanowires.
Co-reporter:Hongyan Hu, Zhengbo Jiao, Hongchao Yu, Gongxuan Lu, Jinhua Ye and Yingpu Bi
Journal of Materials Chemistry A 2013 - vol. 1(Issue 7) pp:NaN2390-2390
Publication Date(Web):2012/12/18
DOI:10.1039/C2TA01151D
Tetrahedral Ag3PO4 submicro-crystals have been fabricated in high-yield by directly reacting commercial Ag foils with H2O2 and NaH2PO4 in aqueous solution at room temperature, which exhibit higher photocatalytic activities than Ag3PO4 cubes, particles, and N-doped TiO2 for the degradation of organic contaminants under visible light irradiation.
Co-reporter:Yingpu Bi, Hongyan Hu, Zhengbo Jiao, Hongchao Yu, Gongxuan Lu and Jinhua Ye
Physical Chemistry Chemical Physics 2012 - vol. 14(Issue 42) pp:NaN14488-14488
Publication Date(Web):2012/09/10
DOI:10.1039/C2CP42822A
Two-dimensional dendritic Ag3PO4 nanostructures have been synthesized in high-yield by reacting Ag nanowires with H2O2 and NaH2PO4 in aqueous solution at room temperature, which exhibit much higher photocatalytic activities than irregular Ag3PO4 nanocrystals and N-doped TiO2 catalyst for the degradation of organic contaminants under visible light irradiation.
Co-reporter:Hongyan Hu, Zhengbo Jiao, Teng Wang, Jinhua Ye, Gongxuan Lu and Yingpu Bi
Journal of Materials Chemistry A 2013 - vol. 1(Issue 36) pp:NaN10616-10616
Publication Date(Web):2013/07/19
DOI:10.1039/C3TA12061A
Herein, we demonstrate a facile and general process for fabricating uniform and perfect Ag/Ag3PO4 core–shell coaxial hetero-nanowires at room temperature, which exhibit excellent photocatalytic activities for degradation of organic contaminants under visible light irradiation.
Co-reporter:Ying Ma, Yulong Jia, Lina Wang, Min Yang, Yingpu Bi and Yanxing Qi
Journal of Materials Chemistry A 2016 - vol. 4(Issue 27) pp:NaN10418-10418
Publication Date(Web):2016/06/14
DOI:10.1039/C6TA03003C
Novel three dimensional MoO2–graphene (MoO2–G) flower-like nanostructures are synthesized via a facile hydrothermal reaction. It has been shown that the MoO2–G demonstrates enhanced supercapacitive performance compared to pure MoO2 particles. The excellent electrochemical performance is attributed to the introduction of graphene and a hierarchical nanostructure, providing a large surface area and low equivalent series resistance.
Co-reporter:Shaopeng Li, Hongyan Hu and Yingpu Bi
Journal of Materials Chemistry A 2016 - vol. 4(Issue 3) pp:NaN800-800
Publication Date(Web):2015/12/07
DOI:10.1039/C5TA08720A
Herein, we demonstrate that quantum-sized Pd dot-decorated ultra-thin anatase TiO2 nanosheets with exposed (001) facets (2 wt%) exhibit a highly efficient catalytic activity for hydrogen generation from formaldehyde solution at room temperature, which is much higher than that of traditional Pd/TiO2 (Degussa P25) and pure Pd nanoparticles. By further optimizing the reaction parameters, the hydrogen generation rates could reach up to 250 mL g−1 min−1 and keep consistent for ten hours. Owing to its high efficiency and stability, this hydrogen production reaction may serve as an alternative technique for supplying hydrogen in practical applications.
Co-reporter:Zhengbo Jiao, Yan Zhang, Hongchao Yu, Gongxuan Lu, Jinhua Ye and Yingpu Bi
Chemical Communications 2013 - vol. 49(Issue 6) pp:NaN638-638
Publication Date(Web):2012/11/26
DOI:10.1039/C2CC37324F
Herein, we demonstrate for the first time the fabrication of concave trisoctahedral Ag3PO4 microcrystals enclosed by {221} and {332} facets based on the heteroepitaxial growth procedure, which exhibit much higher photocatalytic activities than cubic Ag3PO4 and commercial N-doped TiO2.
Co-reporter:Teng Wang, Bingjun Jin, Zhengbo Jiao, Gongxuan Lu, Jinhua Ye and Yingpu Bi
Chemical Communications 2015 - vol. 51(Issue 11) pp:NaN2106-2106
Publication Date(Web):2014/12/17
DOI:10.1039/C4CC09628B
We demonstrate a simple and effective strategy for vertically growing Au nanowires over ZnO nanowire arrays to construct a cross-linked hierarchical architecture under the synergistic effects of the electric field direction and photoreduction, which exhibit excellent photoelectrochemical performances under visible light irradiation.
Co-reporter:Wei Wang, Yajun Zhang, Lei Wang and Yingpu Bi
Journal of Materials Chemistry A 2017 - vol. 5(Issue 6) pp:NaN2482-2482
Publication Date(Web):2016/12/29
DOI:10.1039/C6TA10308A
We demonstrated a facile and effective method to fabricate nanoporous FeVO4 photoanodes for efficient solar water splitting. More importantly, the rationally self-doped Fe2+ or Fe3+ on the FeVO4 photoanode could further improve the photoelectrochemical (PEC) performance, which may provide an alternative approach for the design and construction of low-cost and highly efficient PEC systems.
