Co-reporter:Qingyi Lu;Feng Gao;Xiangkang Meng;Sridhar Komarneni
The Journal of Physical Chemistry C September 4, 2008 Volume 112(Issue 35) pp:13359-13365
Publication Date(Web):2017-2-22
DOI:10.1021/jp804533z
A simple biomolecule-mediated process has been used to direct the growth and assembly of CdS nanorods. Many kinds of biomolecules such as amino acids (glycine, serine), peptides (glycyl-glycine, glutathione), protein (gelatin, lysozyme), protein metabolism product (guanidine), RNA base (uracil), and pyrimidine (uridine) have been utilized. A series of complex CdS nanorod-based structures have been first synthesized in high yields, including three-dimensional (3D) and two-dimensional (2D) leaflike structures and flower-like structures by assembly of CdS nanorods. The products’ morphology and structure have been confirmed to correspond to the used biomolecules’ type and structure. This directed-assembly method using biomolecules may facilitate the assembly of complex nanostructures and would theoretically lead to more and more complicated and useful nanostructures in the future.
Co-reporter:Yinlin Tong;Jiaying Xu;Hong Jiang;Feng Gao
Dalton Transactions 2017 vol. 46(Issue 30) pp:9918-9924
Publication Date(Web):2017/08/01
DOI:10.1039/C7DT01931A
In this study, we developed a one-step self-activated route for synthesizing novel core–shell Cu@polymer nanocomposites. Under solvothermal conditions, Cu2+ was reduced to metal copper by formaldehyde and salicylaldehyde and the newly generated copper crystals acted as the catalysts to activate the condensation polymerization between formaldehyde and salicylaldehyde, resulting in the formation of core–shell Cu@polymer nanocomposites with Cu nanoparticles as the cores and polymer as the shells. The Cu@polymer nanocomposites can be applied as a nonenzymatic sensor for glucose detection. The as-prepared Cu@polymer nanocomposite modified electrode shows good linear dependence in a wide range from 0.01 mM to 1 mM, a low detection limit, high sensitivity up to 1417.1 μA cm−2 mM−1 and great selectivity to glucose concentration change.
Co-reporter:Ying Jin, Liyun Dang, Hao Zhang, Chuang Song, Qingyi Lu, Feng Gao
Chemical Engineering Journal 2017 Volume 326(Volume 326) pp:
Publication Date(Web):15 October 2017
DOI:10.1016/j.cej.2017.05.155
•Unit-cell thick α-Fe2O3 nanosheets with thickness of 1.3 nm were firstly synthesized.•The nanosheets were synthesized through a metal-ion-intervened hydrothermal method.•The α-Fe2O3 nanosheets were converted to magnetic γ-Fe2O3 nanosheets by a calcination process.•The obtained magnetic γ-Fe2O3 nanosheets were with unit-cell thickness of 0.8 nm.•The unit-cell-thick γ-Fe2O3 nanosheets exhibit great enhanced electrochemical performances.The synthesis of ultrathin magnetic nanosheets is significant for the development of next-generation nanodevices but remains to be a big challenge. Herein, we present facile approaches for large-scaled production of cell-unit-thick single-crystalline iron oxide nanostructures. The ultrathin hematite (α-Fe2O3) nanosheets with unit-cell thickness of 1.3 nm are firstly synthesized using a metal-ion-intervened hydrothermal method. Then the α-Fe2O3 nanosheets are converted to magnetic maghemite (γ-Fe2O3) nanosheets with unit-cell thickness of 0.8 nm by a simple calcination process. The Li-ion battery studies reveal that unit-cell-thick γ-Fe2O3 nanosheets exhibit great enhanced electrochemical performances with high specific capacitance approaching to its theoretical value and excellent cycling stability.
Co-reporter:Yinlin Tong, Jiaying Xu, Hong Jiang, Feng Gao, Qingyi Lu
Chemical Engineering Journal 2017 Volume 316(Volume 316) pp:
Publication Date(Web):15 May 2017
DOI:10.1016/j.cej.2017.01.073
•Co(OH)2 nanosheets were easily obtained by transformation from Co-based complex precursor.•Co(OH)2 nanosheets with different thicknesses can be controllably synthesized.•The nanosheets’ thickness was demonstrated to have great effects on OER performances.•The thinnest Co(OH)2 nanosheets exhibits great OER performances by comparison to commercial IrO2.Electrochemical water splitting is one of the most promising approaches to meet the requirement to develop highly efficient and accessible systems for renewable energy conversion and storage. Herein, we report the synthesis of two-dimensional Co(OH)2 nanosheets with different thicknesses and explore the thickness effect of the nanosheets on oxygen evolution reaction (OER). It is demonstrated that the OER performances can be greatly enhanced with the decrease of Co(OH)2 nanosheets’ thickness, which would relate to the increasing active sites for reaction due to the ultrathin nature of the nanosheets. The ultrathin Co(OH)2 nanosheets with a thickness of about 4.0 nm exhibit excellent OER performances with a low onset potential, a low overpotential of 327 mV and a small Tafel slope of 78 mV per decade in alkaline media, which are even better than those of commercial IrO2. Our findings may point out the direction of developing ultrathin Co-based nanosheets as a promising substitution for high-cost commercial IrO2 for electrochemical water splitting.
Co-reporter:Jingzhou Yin;Yu Zhang;Xinglong Wu;Zhengjing Jiang;Liyun Dang;Haifeng Ma;Yuanyuan Guo;Feng Gao;Qingyu Yan
Journal of Materials Chemistry A 2017 vol. 5(Issue 25) pp:12757-12761
Publication Date(Web):2017/06/27
DOI:10.1039/C7TA03929H
In this work, we report a facile approach to synthesize uniform Co3O4 hollow spheres with tunable shell numbers via controllably annealing cobalt(II) complex precursors at different heating rates. When evaluated as anodes for LIBs, the multi-shelled Co3O4 spheres exhibit high specific capacity, good rate capabilities and excellent cycling stability (1058 mA h g−1 over 100 cycles at 1 A g−1).
Co-reporter:Haifeng Ma, Hong Jiang, Ying Jin, Liyun Dang, Qingyi Lu, Feng Gao
Carbon 2016 Volume 105() pp:586-592
Publication Date(Web):August 2016
DOI:10.1016/j.carbon.2016.04.063
Lithium-ion batteries (LIBs) call for brand new and advanced materials to alleviate the pressure on depletion of fossil fuels. Carbon materials with controlled structures are considered to be potential anode materials of LIBs due to their desirable advantages. Herein, a novel three dimensional (3D) structure of carbon nanocages supported by ultrathin carbon nanosheets (CNCs@CNSs) has been synthesized through a facile one-step route by graphitizing common surfactant. The ultrathin carbon nanosheets possess a thickness of 1.6 nm with hollow carbon nanocages dispersing on them to prevent the stacking. As the first combination of carbon nanocages with two dimensional (2D) carbon nanosheets, the 3D hybrids show excellent LIB performances and exhibit a reversible capacity of 650 mAh g−1 at 0.5 C with rare capacity loss. Fast charging in 10 min with a high capacity of 580 mAh g−1 at 10 C after 500 cycles has also been exploited, which presents broad prospects for the advancement of LIBs.
Co-reporter:Lanfang Wang;Chuang Song;Yi Shi;Liyun Dang;Ying Jin;Hong Jiang;Dr. Qingyi Lu;Dr. Feng Gao
Chemistry - A European Journal 2016 Volume 22( Issue 16) pp:5575-5582
Publication Date(Web):
DOI:10.1002/chem.201504569
Abstract
Two-dimensional nanosheets with high specific surface areas and fascinating physical and chemical properties have attracted tremendous interests because of their promising potentials in both fundamental research and practical applications. However, the problem of developing a universal strategy with a facile and cost-effective synthesis process for multi-type ultrathin 2 D nanostructures remains unresolved. Herein, we report a generalized low-temperature fabrication of scalable multi-type 2 D nanosheets including metal hydroxides (such as Ni(OH)2, Co(OH)2, Cd(OH)2, and Mg(OH)2), metal oxides (such as ZnO and Mn3O4), and layered mixed transition-metal hydroxides (Ni-Co LDH, Ni-Fe LDH, Co-Fe LDH, and Ni-Co-Fe layered ternary hydroxides) through the rational employment of a green soft-template. The synthesized crystalline inorganic nanosheets possess confined thickness, resulting in ultrahigh surface atom ratios and chemically reactive facets. Upon evaluation as electrode materials for pseudocapacitors, the Ni-Co LDH nanosheets exhibit a high specific capacitance of 1087 F g−1 at a current density of 1 A g−1, and excellent stability, with 103 % retention after 500 cycles. This strategy is facile and scalable for the production of high-quality ultrathin crystalline inorganic nanosheets, with the possibility of extension to the preparation of other complex nanosheets.
Co-reporter:Jing Sun, Haifeng Ma, Hong Jiang, Liyun Dang, Qingyi Lu and Feng Gao
Journal of Materials Chemistry A 2015 vol. 3(Issue 31) pp:15882-15888
Publication Date(Web):24 Jun 2015
DOI:10.1039/C5TA01613D
We developed a one-step method to obtain a high dispersion of Pt-based alloy nanoparticles on graphene by using both the carrier function and the reducibility of carbon without the addition of any other reducing agent. This method opens up a general and feasible route for the synthesis of different metals, and binary and ternary alloys (such as Pt, Pt–Cu, Pt–Ni, Pt–Ni–Cu, Pt–Co–Cu, Pt–Au–Cu, and so on) on graphene sheets, which would bring potential applications in many fields. Particularly in this study, the obtained PtCu/G composites exhibit superior electrochemical activities and high poison tolerance toward methanol oxidation compared to Pt/graphene and commercial Pt/graphene composites, demonstrating that PtCu/graphene can be used as a promising catalyst for direct methanol fuel cells.
Co-reporter:Wei Du;Xiaoqian Xu;Han Hao;Rongmei Liu;Di Zhang;Feng Gao
Science China Chemistry 2015 Volume 58( Issue 5) pp:863-870
Publication Date(Web):2015 May
DOI:10.1007/s11426-014-5256-y
An economical idea was developed to synthesize fluorescent carbon quantum dots (CQDs) directly from the refluxing extraction of orange pericarp via a hydrothermal technique. Hydrothermal temperatures and times were adjusted to control the particle sizes and the quantum yields of the obtained CQDs. The as-prepared carbon quantum dots showed narrow particle size distribution, good water solubility, and acceptable fluorescence lifetimes. Due to their high stability, these obtained carbon quantum dots have great application potential in nano-biotechnology. Furthermore, carbon spheres with uniform morphology and size can be easily obtained as the reaction byproducts of this green synthesis process.
Co-reporter:Wei Du;Xiaoqian Xu;Di Zhang;Feng Gao
Science China Chemistry 2015 Volume 58( Issue 4) pp:627-633
Publication Date(Web):2015 April
DOI:10.1007/s11426-014-5242-4
Manganese oxides with different crystalline phases and morphologies were prepared by calcining MnCO3 precursors. The MnCO3 precursors with different morphologies were obtained through a green route under hydrothermal conditions with orange pericarp extracting solution as the reducing agent. By calcining the precursor under different temperatures and atmospheres, MnOx with different stoichiometric ratios (i.e., MnO, MnO2, Mn2O3, and Mn3O4) can be obtained. Electrochemical studies reveal that among these manganese oxides, MnO or MnO2 are more suitable as supercapacitor working electrodes than Mn2O3 or Mn3O4. They exhibit high specific capacitance up to 296.6 F/g and also possess good cycling stability, which make them potential electrode materials for supercapacitors.
Co-reporter:Xiaoqian Xu ; Fangjian Qiao ; Liyun Dang ; Qingyi Lu ;Feng Gao
The Journal of Physical Chemistry C 2014 Volume 118(Issue 30) pp:16856-16862
Publication Date(Web):May 14, 2014
DOI:10.1021/jp500364v
In this study, porous SnO2 nanosheets composed of SnO2 nanoparticles were prepared by calcining SnS2 nanosheets. The SnO2 nanoparticles have an average diameter of 15–20 nm and porous SnO2 nanosheets have a large specific surface area of 37.39 m2/g. As photoanodes, the dye-sensitized solar cell (DSSCs) based on porous SnO2 nanosheets show a superior power conversion efficiency of 0.562%, improved by 134.2% compared to pure SnO2 nanoplate (0.240%). The efficiency improvement could be attributed to the unique porous architecture, which provides efficient electron channels and excellent ability of light scattering.
Co-reporter:Feng Gao;RongMei Liu;JingZhou Yin
Science China Chemistry 2014 Volume 57( Issue 1) pp:114-121
Publication Date(Web):2014 January
DOI:10.1007/s11426-013-4973-y
High surface energy of high-index facets endows nanocrystals with high activities and thus promotes potential applications such as highly efficient catalysts, special optical, electrical and magnetic devices. But the high surface energy of the high-index facets usually drives them to grow faster than the other facets and finally disappear during the crystal growth, which leads the synthesis of nanocrystals with high-indexed facets exposed to be a great challenge. Herein, we introduced two routes to control the synthesis of α-Fe2O3 polyhedrons with different sets of high-index facets, one using different metal ions (Ni2+, Cu2+ or Zn2+) as structure-directing agents and the other applying polymer surfactant sodium carboxymethyl cellulose (CMC) as additive. The growth process of high-index α-Fe2O3 polyhedrons was also discussed and possible growth mechanism was proposed.
Co-reporter:Qun Chen, Chengzhen Wei, Feng Gao, Huan Pang and Qingyi Lu
Nanoscale 2013 vol. 5(Issue 24) pp:12231-12236
Publication Date(Web):17 Sep 2013
DOI:10.1039/C3NR03453D
Self-supported Mn3O4 patterns of aligned nanorods and nanotubes were synthesized through a bi-directional-bi-dimensionality growth model by using sodium gluconate and urea as additives under mild hydrothermal conditions without the use of any substrates. In one direction, Mn3O4 grows to form one-dimensional nanorods or nanotubes, while in the other direction Mn3O4 grows into two-dimensional nanoplates to support the nanorods or nanotubes to align into arrays. These two kinds of new nanostructures, a nanotube pattern and a nanorod pattern, show similar and good bacteriostasis for Gram positive bacteria, but for Gram negative bacteria the nanotube pattern shows much better bacterial restraint than the nanorod pattern. Magnetic studies show that the nanorod arrays display similar magnetic properties to the commercial Mn3O4, while the nanotube arrays show different ferromagnetic behaviors with enhanced remnant magnetization and saturation magnetization (Ms) at low temperature.
Co-reporter:Wei Du, Rongmei Liu, Yuanwen Jiang, Qingyi Lu, Yongzhang Fan, Feng Gao
Journal of Power Sources 2013 Volume 227() pp:101-105
Publication Date(Web):1 April 2013
DOI:10.1016/j.jpowsour.2012.11.009
One-dimensional (1D) cobalt acetate hydroxide (Co5(OH)2(CH3COO)8·2H2O) prisms has been obtained through a low temperature re-crystallization process in the dissolvant of ethanol and then transferred to cobalt oxide by calcining in the air. Cobalt oxide keeps the outside configuration of the 1D cobalt acetate hydroxide but turns to be boxes with hollow structure inside through the Kirkendall effect. The precursor prisms and polycrystalline boxes both have length of about 3 μm, width of 300 nm and height of 300 nm characterized by X-ray powder diffraction (XRD), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The electrochemical measurement results show that the hollow Co3O4 structures exhibit wonderful capacitive properties with high capacitance and good cyclicity.Highlights► Cobalt acetate hydroxide prisms were obtained by a low temperature re-crystallization process. ► Hollow Co3O4 boxes were obtained by calcining cobalt acetate hydroxide prisms in air. ► Hollow Co3O4 structures exhibit wonderful capacitive properties.
Co-reporter:Rongmei Liu, Wei Du, Qun Chen, Feng Gao, Chengzhen Wei, Jing Sun and Qingyi Lu
RSC Advances 2013 vol. 3(Issue 9) pp:2893-2896
Publication Date(Web):21 Dec 2012
DOI:10.1039/C2RA22320A
Uniform Zn2SnO4/SnO2 hollow spheres were successfully synthesized and hybridized by calcining ZnSn(OH)6 solid spheres in air, and showed a very good efficiency of 4.52% as an electrode material for DSSCs. The in situ hybridization of Zn2SnO4 and SnO2 in Zn2SnO4/SnO2 hollow spheres is beneficial for electron transport and light scattering, and leads to the high efficiency of the Zn2SnO4/SnO2 composite in DSSCs.
Co-reporter:Rongmei Liu;Jingzhou Yin;Wei Du;Feng Gao;Yongzhang Fan
European Journal of Inorganic Chemistry 2013 Volume 2013( Issue 8) pp:1358-1362
Publication Date(Web):
DOI:10.1002/ejic.201200975
Abstract
In this study, we investigated the synthesis of monodisperse CuO hard and hollow nanospheres with extraordinary visible-light photocatalytic abilities for dye photodegradation. The monodisperse CuO hard nanospheres were constructed with assistance from the water-soluble biopolymer sodium alginate (SA). In alkaline solution, the hard CuO spheres can be gradually corroded by ammonia to form hollow CuO nanospheres under hydrothermal conditions. Their visible-light photocatalytic activities were investigated and the results show that both of the hard and the hollow CuO spheres have great visible-light photocatalytic abilities for the photodegradation of dyes. In particular, CuO hollow nanospheres show extraordinary photodegradation activity towards Methyl blue (MB) and it only takes 1 min for 50 mg of CuO hollow spheres to photodegrade 100 mL of 50 mg L–1 MB solution by using solar light and without the assistance of any equipment while for 50 mg of P25 (TiO2), it takes more than 30 min even under UV irradiation. As promising energy-saving materials, CuO nanospheres would have great application potential in environment protection technology.
Co-reporter:Chengzhen Wei;Wenzhe Zang;Jingzhou Yin; Qingyi Lu;Qun Chen;Rongmei Liu;Feng Gao
ChemPhysChem 2013 Volume 14( Issue 3) pp:591-596
Publication Date(Web):
DOI:10.1002/cphc.201200862
Abstract
In this study, we report the synthesis of monodispersive solid and hollow CdS spheres with structure-dependent photocatalytic abilities for dye photodegradation. The monodispersive CdS nanospheres were constructed with the assistance of the soulcarboxymthyi chitosan biopolymer under hydrothermal conditions. The solid CdS spheres were corroded by ammonia to form hollow CdS nanospheres through a dissolution–reprecipitation mechanism. Their visible-light photocatalytic activities were investigated, and the results show that both the solid and the hollow CdS spheres have visible-light photocatalytic abilities for the photodegradation of dyes. The photocatalytic properties of the CdS spheres were demonstrated to be structure dependent. Although the nanoparticles comprising the hollow spheres have larger sizes than those comprising the solid spheres, the hollow CdS spheres have better photocatalytic performances than the solid CdS spheres, which can be attributed to the special hollow structure.
Co-reporter:Yongzhang Fan, Rongmei Liu, Wei Du, Qingyi Lu, Huan Pang and Feng Gao
Journal of Materials Chemistry A 2012 vol. 22(Issue 25) pp:12609-12617
Publication Date(Web):30 Apr 2012
DOI:10.1039/C2JM31879B
Two different nanostructured copper–isonicotinic acid (INA) coordination polymers, Cu(C6H4NO2)2(H2O)4 and [Cu(C6H4NO2)(OH)]H2O have been successfully synthesized under hydrothermal conditions on a large scale without the assistance of surfactants or template. Cu(C6H4NO2)2(H2O)4 has the morphology of 2-dimensional (2D) butterfly-like nanosheet structures, while [Cu(C6H4NO2)(OH)]H2O consists of one-dimensional (1D) nanorods. A possible formation mechanism of the obtained coordination polymer nanostructures is proposed with provision of the crystal structure. After heat treatment, hierarchical CuO butterfly-sheet-like nanostructures and CuO nanotubes were obtained. The photocatalytic and antibacterial studies indicate that the as-obtained CuO samples have great photocatalytic activities for the degradation of Rhodamine B and good bacteriostatic activities. In addition, the electrochemical measurements show that CuO samples exhibit high reversible discharge capacities and stable cyclic performances.
Co-reporter:Jingzhou Yin, Feng Gao, Chengzhen Wei, and Qingyi Lu
Inorganic Chemistry 2012 Volume 51(Issue 20) pp:10990-10995
Publication Date(Web):October 2, 2012
DOI:10.1021/ic301496k
We successfully controlled the crystallographic surface of ZnSn(OH)6 crystals and systematically obtained ZnSn(OH)6 crystals in different shapes including cubes, truncated cubes, cuboctahedrons, truncated octahedrons, and octahedrons using a simple solvothermal method in a methylcellulose (MC) ethanol/water solution. By simply adjusting the amount of the NaOH solution added to the reaction system, we observed the shape evolution of ZnSn(OH)6 particles from cube to octahedron, with the sizes gradually increasing from about 200 nm to 1–2 μm. These results not only provide ZnSn(OH)6 polyhedra bound by different lattice planes, but also make it possible to investigate the morphology–property relationship of ZnSn(OH)6 particles with different morphologies obtained under similar conditions. The antibacterial activities of the as-prepared ZnSn(OH)6 polyhedral particles were studied. It was found that the antibacterial activities of ZnSn(OH)6 particles against Escherichia coli depend on the shape of the ZnSn(OH)6 particles, demonstrating that the surface structure of nanocrystals affects the antibacterial activity. Additionally, the obtained ZnSn(OH)6 polyhedra can be applied as precursors for Zn2SnO4/SnO2 composites with different morphologies by calcining at 600 °C.
Co-reporter:Huan Pang, Feng Gao, Qun Chen, Rongmei Liu and Qingyi Lu
Dalton Transactions 2012 vol. 41(Issue 19) pp:5862-5868
Publication Date(Web):28 Mar 2012
DOI:10.1039/C2DT12494G
Dendrite-like Co3O4 nanostructure, made up of many nanorods with diameters of 15–20 nm and lengths of 2–3 μm, has been successfully prepared by calcining the corresponding nanostructured Co-8-hydroxyquinoline coordination precursor in air. The Co3O4 nanostructure was evaluated as an electrochemical sensor for H2O2 detection and the results reveal that it has good linear dependence and high sensitivity to H2O2 concentration changes. As an electrode material of a supercapacitor, it was found that the nanostructured Co3O4 electrode exhibits high specific capacitance and long cycle life. The Co3O4 nanostructure also has good catalytic properties and is steadily active for CO oxidation, giving 100% CO conversion at low temperatures. The multifunctional Co3O4 nanostructure would be a promising functional nanomaterial applied in multi industrialized fields.
Co-reporter:Rongmei Liu;Yuanwen Jiang;Hao Fan; Qingyi Lu;Wei Du; Feng Gao
Chemistry - A European Journal 2012 Volume 18( Issue 29) pp:8957-8963
Publication Date(Web):
DOI:10.1002/chem.201201108
Abstract
In this study, quasi-cubic and hexagonal bipyramid α-Fe2O3 polyhedrons with high-index facets exposed were controllably synthesized by applying metal ions Zn2+ or Cu2+ as structure-directing agents. The growth of the α-Fe2O3 nanostructures with high-index facets were induced by metal ions without the addition of any other surfactants. The quasi-cubic form controlled by Zn2+ looks like a cube but has an angle of approximately 86° bound by (012), (10-2), and (1-12) facets, whereas the hexagonal bipyramid form controlled by Cu2+ has a sixfold axis bound by {012} facets. Magnetic measurements confirm that these two kinds of nanocrystals display shape- and surface-dependent magnetic behaviors. The hexagonal bipyramid iron oxide nanocrystals show a lower Morin transition temperature of 240 K and might be spin-canted ferromagnetically controlled at room temperature, and the ferromagnetism disappears at low temperature. The quasi-cubic nanocrystals have a splitting between FC curve and ZFC curve from the highest experimental temperature and no Morin transformation occurs; this indicates that they would be defect ferromagnetically controlled at low temperature. The reported metal-ion-directing technique could provide a universal method for shape- and surface-controlled synthesis of nanocrystals with high-index facets exposed.
Co-reporter:Rongmei Liu;Yuanwen Jiang;Hao Fan; Qingyi Lu;Wei Du; Feng Gao
Chemistry - A European Journal 2012 Volume 18( Issue 29) pp:
Publication Date(Web):
DOI:10.1002/chem.201290121
Co-reporter:Huan Pang, Qingyi Lu, Changyun Chen, Xiaoran Liu and Feng Gao
Journal of Materials Chemistry A 2011 vol. 21(Issue 36) pp:13889-13894
Publication Date(Web):09 Aug 2011
DOI:10.1039/C1JM10923E
Nickel orthoborate Ni3(BO3)2
nanoribbons were synthesized via a facile solid state reaction. The process is very simple and only two chemicals (H3BO3 and Ni(NO3)2) are used. It is the first time that well-defined 1D Ni3(BO3)2 nanoribbons can be obtained. The nanoribbons have widths in the range of 100–150 nm and length up to 20 μm. The antimicrobial studies show that the Ni3(BO3)2 nanoribbons have good antimicrobial activities towards Gram-negative bacteria and Gram-positive bacteria. In addition, we also explored the application of the Ni3(BO3)2 nanoribbons as electrochemical capacitors and found that the Ni3(BO3)2 nanoribbons have a large specific capacitance of 170 F g−1. The electric properties of single Ni3(BO3)2 nanoribbons were also investigated.
Co-reporter:Huan Pang, Qingyi Lu and Feng Gao
Chemical Communications 2011 vol. 47(Issue 42) pp:11772-11774
Publication Date(Web):26 Sep 2011
DOI:10.1039/C1CC14618A
Graphene oxide (GO) has been demonstrated as a nanostructure growth-directing template for the synthesis of fusiform zirconia nanostructures on GO planes. The obtained fusiform zirconia–GO hybrid composites (FZGO) have good dispersion ability and show highly selective capture of phosphopeptides from complex peptide mixtures.
Co-reporter:Jingzhou Yin, Feng Gao, Jianjun Wang and Qingyi Lu
Chemical Communications 2011 vol. 47(Issue 14) pp:4141-4143
Publication Date(Web):28 Feb 2011
DOI:10.1039/C1CC10382B
Novel drum-like Cd(OH)2 superstructures with uniform size were synthesized on a large scale through a facile one-pot hydrothermal route with the co-existence of ammonia and biopolymer sodium carboxymethyl cellulose solutions.
Co-reporter:Lina Guan, Huan Pang, Jianjun Wang, Qingyi Lu, Jingzhou Yin and Feng Gao
Chemical Communications 2010 vol. 46(Issue 37) pp:7022-7024
Publication Date(Web):24 Aug 2010
DOI:10.1039/C0CC02331K
Novel comb-like cuprous oxide nanorod-based structures were synthesized through an interface etching method with salicylaldehyde as ligand and reducing agent in a water–toluene system and were demonstrated to have great application potentials as ethanol sensors.
Co-reporter:Huan Pang, Qingyi Lu, Jianjun Wang, Yecheng Li and Feng Gao
Chemical Communications 2010 vol. 46(Issue 12) pp:2010-2012
Publication Date(Web):22 Jan 2010
DOI:10.1039/B919764H
Glucose was used to synthesize high-quality Cu microplates which underwent in situ large-scale assembly into puzzle-like patterns. The micropuzzles were applied to nonenzymatic glucose sensors. The as-prepared Cu micropuzzle-modified electrode shows good linear dependence and high sensitivity and selectivity to glucose concentration change.
Co-reporter:Jingzhou Yin, Feng Gao, Yufeng Wu, Jianjun Wang and Qingyi Lu
CrystEngComm 2010 vol. 12(Issue 11) pp:3401-3403
Publication Date(Web):14 Jun 2010
DOI:10.1039/C003551N
Several manganese-based nanostructures, including novel Mn3O4 octahedrons, MnOOH nanorods, MnO2 nanowires and aggregated MnCO3 nanoparticles in the form of spindles, have been prepared through the redox reactions between KMnO4 and sodium carboxymethyl cellulose.
Co-reporter:Jingzhou Yin, Qingyi Lu, Zhinan Yu, Jianjun Wang, Huan Pang and Feng Gao
Crystal Growth & Design 2010 Volume 10(Issue 1) pp:40
Publication Date(Web):December 14, 2009
DOI:10.1021/cg901200u
In this study, hierarchically complex hollow cage-like superstructures assembled by ZnO nanorods have been successfully constructed with water-soluble biopolymer sodium carboxymethyl cellulose as crystal growth modifiers. The number of the hollow cage could be adjusted from single-cage, double-cage, multi-cage to connected-cage. A possible formation mechanism of the hollow superstructures has also been proposed. The catalytic study shows that these ZnO superstructures have good abilities to enhance propellant combustion of ammonium perchlorate (an important oxidizer used in solid rocket propellants), by decreasing its decomposition temperature to as low as 285 °C. Photoluminescence studies reveal that the increase in the cage number leads to an increase in the relative photoluminescence intensity around 500 to 700 nm, which might be attributed to the increase in radiative defects at the interface of the components of the ZnO hollow structure with the growth in cage number.
Co-reporter:Huan Pang, Feng Gao and Qingyi Lu
CrystEngComm 2010 vol. 12(Issue 2) pp:406-412
Publication Date(Web):11 Sep 2009
DOI:10.1039/B904705K
In this article, we proposed a glycine-assisted double-solvent thermal approach to controllably synthesize a series of Cu2O microcrystals. In a water–ethanol system, the products have predominantly octahedral and polyhedral structures; while in water–glycol system or a water–glycerin system, the products have more tendencies to form a cubic type structure. Compared with the conventional route, this method provides a mild technique for various morphologies of Cu2O and omits the need for template or surfactant in such mild conditions. The effects of glycine and double solvents on the morphology control have also been discussed. The investigations of the application of these crystals for photodegradation of rhodamine B and mechano-catalytic overall water splitting to produce H2 reveals that all these products have great catalytic activities and the catalytic activities are affected by the morphology of the Cu2O crystals.
Co-reporter:Jingzhou Yin;Zhinan Yu;Feng Gao ;Jianjun Wang;Huan Pang
Angewandte Chemie International Edition 2010 Volume 49( Issue 36) pp:6328-6332
Publication Date(Web):
DOI:10.1002/anie.201002557
Co-reporter:Huan Pang, Qingyi Lu, Yecheng Li and Feng Gao
Chemical Communications 2009 (Issue 48) pp:7542-7544
Publication Date(Web):06 Nov 2009
DOI:10.1039/B914898A
Nickel oxide nanotubes with great antibacterial activities, electrochemical capacitance, and magnetic properties have been synthesized through a precursor method with dimethylglyoxime as precipitant for the precursor, and the method has been developed for the synthesis of Ni/C nanorods.
Co-reporter:Feng Gao, Huan Pang, Shuoping Xu and Qingyi Lu
Chemical Communications 2009 (Issue 24) pp:3571-3573
Publication Date(Web):08 May 2009
DOI:10.1039/B904801D
Porous Cu/C composites and CuO nanostructures can be easily synthesized from coordination precursors between Cu2+ and glycine, which are obtained simply by adding ethanol as a poor solvent into a Cu2+ and glycine solution, and verified to be potential antibacterial agents and photocatalysts.
Co-reporter:Huan Pang, Feng Gao and Qingyi Lu
Chemical Communications 2009 (Issue 9) pp:1076-1078
Publication Date(Web):05 Jan 2009
DOI:10.1039/B816670F
A glycine-mediated mixed-solvothermal approach has been proposed for the synthesis of novel Cu2O structures with different morphologies and the morphology effect on the antibacterial activity of the obtained Cu2O crystals has been studied, confirming that the obtained Cu2O crystals all show good antibacterial effects and that with the morphology of the Cu2O crystals changing from cubic to octahedral, the antibacterial property changes from general bacteriostasis to high selectivity.
Co-reporter:Huan Pang, Feng Gao, Lina Guan, Yiming Huang, Qingyi Lu
Chemical Physics Letters 2009 Volume 482(1–3) pp:118-120
Publication Date(Web):6 November 2009
DOI:10.1016/j.cplett.2009.09.093
Abstract
Using magnetic force lines as invisible template, cobalt microwire arrays, which are formed by cobalt nanoparticles and array along the direction of magnetic force lines, have been successfully obtained. It was confirmed that strong interaction between the synthetic magnetic material and the magnet template has a key effect on the formation of the arrays while weak interaction leads to the formation of individual microwires. This result provides us a new idea that the magnetic force lines could be an ideal template for magnetic material arrays and by controlling the arraying manner of magnet templates, different magnetic patterns could be obtained.
Co-reporter:Feng Gao, Qingyi Lu, Huan Pang and Sridhar Komarneni
The Journal of Physical Chemistry B 2009 Volume 113(Issue 37) pp:12477-12481
Publication Date(Web):August 24, 2009
DOI:10.1021/jp9048499
A brand new sandwich-type poly(furfuryl alcohol) (PFA) nanostructure as well as ordered PFA nanofiber arrays has been successfully obtained through a novel two-step polymerization method by using a porous alumina membrane as the template. This novel structure is made up of ordered PFA nanopillars supported by two PFA films on the top and bottom. The thickness of the PFA films on both sides could be adjusted from several micrometers to tens of micrometers, and the flexibility of the membrane could be controlled in a certain range. This sandwich-type polymer nanostructure can be used as an effective template for constructing other ordered porous films resembling the structure of the parent alumina membrane, and in this study, ordered porous titania membrane has been successfully obtained. Theoretically, many other novel porous (or meso- and macro-mixed porous) materials could be synthesized through this novel template.
Co-reporter:Huan Pang, Yecheng Li, Lina Guan, Qingyi Lu, Feng Gao
Catalysis Communications (10 March 2011) Volume 12(Issue 7) pp:611-615
Publication Date(Web):10 March 2011
DOI:10.1016/j.catcom.2010.12.015
An effective, recyclable, and biocompatible photocatalyst, TiO2/Ni composite, has been successfully synthesized by coating TiO2 films onto one-dimensional (1D) Ni nanostructures. The used 1D Ni nanomaterials have urchin-like structures, which makes them easily be coated by TiO2 nanocrystals. The TiO2/Ni nanocomposites have the functions of both TiO2 and Ni. The photocatalytic and biocompatibility studies show that the composite has outstanding photocatalytic activities for the decomposition of organic pollutants and great biocompatibility. The existence of magnetic Ni nanostructure makes the composite also has good magnetic properties, which enable the photocatalysts to be easily separated and recycle-used.Download full-size imageResearch Highlights► TiO2/Ni composite was easily synthesized using urchin-like Ni structures as template. ► TiO2/Ni composite has the functions of both TiO2 and Ni. ►The composite remains great photocatalytic activity and biocompatibility of TiO2. ►The photocatalysts can be easily separated and recycle-used.
Co-reporter:Yinlin Tong, Jiaying Xu, Hong Jiang, Feng Gao and Qingyi Lu
Dalton Transactions 2017 - vol. 46(Issue 30) pp:NaN9924-9924
Publication Date(Web):2017/07/04
DOI:10.1039/C7DT01931A
In this study, we developed a one-step self-activated route for synthesizing novel core–shell Cu@polymer nanocomposites. Under solvothermal conditions, Cu2+ was reduced to metal copper by formaldehyde and salicylaldehyde and the newly generated copper crystals acted as the catalysts to activate the condensation polymerization between formaldehyde and salicylaldehyde, resulting in the formation of core–shell Cu@polymer nanocomposites with Cu nanoparticles as the cores and polymer as the shells. The Cu@polymer nanocomposites can be applied as a nonenzymatic sensor for glucose detection. The as-prepared Cu@polymer nanocomposite modified electrode shows good linear dependence in a wide range from 0.01 mM to 1 mM, a low detection limit, high sensitivity up to 1417.1 μA cm−2 mM−1 and great selectivity to glucose concentration change.
Co-reporter:Jingzhou Yin, Yu Zhang, Qingyi Lu, Xinglong Wu, Zhengjing Jiang, Liyun Dang, Haifeng Ma, Yuanyuan Guo, Feng Gao and Qingyu Yan
Journal of Materials Chemistry A 2017 - vol. 5(Issue 25) pp:NaN12761-12761
Publication Date(Web):2017/05/31
DOI:10.1039/C7TA03929H
In this work, we report a facile approach to synthesize uniform Co3O4 hollow spheres with tunable shell numbers via controllably annealing cobalt(II) complex precursors at different heating rates. When evaluated as anodes for LIBs, the multi-shelled Co3O4 spheres exhibit high specific capacity, good rate capabilities and excellent cycling stability (1058 mA h g−1 over 100 cycles at 1 A g−1).
Co-reporter:Huan Pang, Qingyi Lu, Jianjun Wang, Yecheng Li and Feng Gao
Chemical Communications 2010 - vol. 46(Issue 12) pp:NaN2012-2012
Publication Date(Web):2010/01/22
DOI:10.1039/B919764H
Glucose was used to synthesize high-quality Cu microplates which underwent in situ large-scale assembly into puzzle-like patterns. The micropuzzles were applied to nonenzymatic glucose sensors. The as-prepared Cu micropuzzle-modified electrode shows good linear dependence and high sensitivity and selectivity to glucose concentration change.
Co-reporter:Huan Pang, Feng Gao and Qingyi Lu
Chemical Communications 2009(Issue 9) pp:NaN1078-1078
Publication Date(Web):2009/01/05
DOI:10.1039/B816670F
A glycine-mediated mixed-solvothermal approach has been proposed for the synthesis of novel Cu2O structures with different morphologies and the morphology effect on the antibacterial activity of the obtained Cu2O crystals has been studied, confirming that the obtained Cu2O crystals all show good antibacterial effects and that with the morphology of the Cu2O crystals changing from cubic to octahedral, the antibacterial property changes from general bacteriostasis to high selectivity.
Co-reporter:Jingzhou Yin, Feng Gao, Jianjun Wang and Qingyi Lu
Chemical Communications 2011 - vol. 47(Issue 14) pp:NaN4143-4143
Publication Date(Web):2011/02/28
DOI:10.1039/C1CC10382B
Novel drum-like Cd(OH)2 superstructures with uniform size were synthesized on a large scale through a facile one-pot hydrothermal route with the co-existence of ammonia and biopolymer sodium carboxymethyl cellulose solutions.
Co-reporter:Huan Pang, Qingyi Lu, Changyun Chen, Xiaoran Liu and Feng Gao
Journal of Materials Chemistry A 2011 - vol. 21(Issue 36) pp:NaN13894-13894
Publication Date(Web):2011/08/09
DOI:10.1039/C1JM10923E
Nickel orthoborate Ni3(BO3)2
nanoribbons were synthesized via a facile solid state reaction. The process is very simple and only two chemicals (H3BO3 and Ni(NO3)2) are used. It is the first time that well-defined 1D Ni3(BO3)2 nanoribbons can be obtained. The nanoribbons have widths in the range of 100–150 nm and length up to 20 μm. The antimicrobial studies show that the Ni3(BO3)2 nanoribbons have good antimicrobial activities towards Gram-negative bacteria and Gram-positive bacteria. In addition, we also explored the application of the Ni3(BO3)2 nanoribbons as electrochemical capacitors and found that the Ni3(BO3)2 nanoribbons have a large specific capacitance of 170 F g−1. The electric properties of single Ni3(BO3)2 nanoribbons were also investigated.
Co-reporter:Yongzhang Fan, Rongmei Liu, Wei Du, Qingyi Lu, Huan Pang and Feng Gao
Journal of Materials Chemistry A 2012 - vol. 22(Issue 25) pp:NaN12617-12617
Publication Date(Web):2012/04/30
DOI:10.1039/C2JM31879B
Two different nanostructured copper–isonicotinic acid (INA) coordination polymers, Cu(C6H4NO2)2(H2O)4 and [Cu(C6H4NO2)(OH)]H2O have been successfully synthesized under hydrothermal conditions on a large scale without the assistance of surfactants or template. Cu(C6H4NO2)2(H2O)4 has the morphology of 2-dimensional (2D) butterfly-like nanosheet structures, while [Cu(C6H4NO2)(OH)]H2O consists of one-dimensional (1D) nanorods. A possible formation mechanism of the obtained coordination polymer nanostructures is proposed with provision of the crystal structure. After heat treatment, hierarchical CuO butterfly-sheet-like nanostructures and CuO nanotubes were obtained. The photocatalytic and antibacterial studies indicate that the as-obtained CuO samples have great photocatalytic activities for the degradation of Rhodamine B and good bacteriostatic activities. In addition, the electrochemical measurements show that CuO samples exhibit high reversible discharge capacities and stable cyclic performances.
Co-reporter:Huan Pang, Feng Gao, Qun Chen, Rongmei Liu and Qingyi Lu
Dalton Transactions 2012 - vol. 41(Issue 19) pp:NaN5868-5868
Publication Date(Web):2012/03/28
DOI:10.1039/C2DT12494G
Dendrite-like Co3O4 nanostructure, made up of many nanorods with diameters of 15–20 nm and lengths of 2–3 μm, has been successfully prepared by calcining the corresponding nanostructured Co-8-hydroxyquinoline coordination precursor in air. The Co3O4 nanostructure was evaluated as an electrochemical sensor for H2O2 detection and the results reveal that it has good linear dependence and high sensitivity to H2O2 concentration changes. As an electrode material of a supercapacitor, it was found that the nanostructured Co3O4 electrode exhibits high specific capacitance and long cycle life. The Co3O4 nanostructure also has good catalytic properties and is steadily active for CO oxidation, giving 100% CO conversion at low temperatures. The multifunctional Co3O4 nanostructure would be a promising functional nanomaterial applied in multi industrialized fields.
Co-reporter:Huan Pang, Qingyi Lu and Feng Gao
Chemical Communications 2011 - vol. 47(Issue 42) pp:NaN11774-11774
Publication Date(Web):2011/09/26
DOI:10.1039/C1CC14618A
Graphene oxide (GO) has been demonstrated as a nanostructure growth-directing template for the synthesis of fusiform zirconia nanostructures on GO planes. The obtained fusiform zirconia–GO hybrid composites (FZGO) have good dispersion ability and show highly selective capture of phosphopeptides from complex peptide mixtures.
Co-reporter:Jing Sun, Haifeng Ma, Hong Jiang, Liyun Dang, Qingyi Lu and Feng Gao
Journal of Materials Chemistry A 2015 - vol. 3(Issue 31) pp:NaN15888-15888
Publication Date(Web):2015/06/24
DOI:10.1039/C5TA01613D
We developed a one-step method to obtain a high dispersion of Pt-based alloy nanoparticles on graphene by using both the carrier function and the reducibility of carbon without the addition of any other reducing agent. This method opens up a general and feasible route for the synthesis of different metals, and binary and ternary alloys (such as Pt, Pt–Cu, Pt–Ni, Pt–Ni–Cu, Pt–Co–Cu, Pt–Au–Cu, and so on) on graphene sheets, which would bring potential applications in many fields. Particularly in this study, the obtained PtCu/G composites exhibit superior electrochemical activities and high poison tolerance toward methanol oxidation compared to Pt/graphene and commercial Pt/graphene composites, demonstrating that PtCu/graphene can be used as a promising catalyst for direct methanol fuel cells.
Co-reporter:Feng Gao, Huan Pang, Shuoping Xu and Qingyi Lu
Chemical Communications 2009(Issue 24) pp:NaN3573-3573
Publication Date(Web):2009/05/08
DOI:10.1039/B904801D
Porous Cu/C composites and CuO nanostructures can be easily synthesized from coordination precursors between Cu2+ and glycine, which are obtained simply by adding ethanol as a poor solvent into a Cu2+ and glycine solution, and verified to be potential antibacterial agents and photocatalysts.
Co-reporter:Lina Guan, Huan Pang, Jianjun Wang, Qingyi Lu, Jingzhou Yin and Feng Gao
Chemical Communications 2010 - vol. 46(Issue 37) pp:NaN7024-7024
Publication Date(Web):2010/08/24
DOI:10.1039/C0CC02331K
Novel comb-like cuprous oxide nanorod-based structures were synthesized through an interface etching method with salicylaldehyde as ligand and reducing agent in a water–toluene system and were demonstrated to have great application potentials as ethanol sensors.
Co-reporter:Huan Pang, Qingyi Lu, Yecheng Li and Feng Gao
Chemical Communications 2009(Issue 48) pp:NaN7544-7544
Publication Date(Web):2009/11/06
DOI:10.1039/B914898A
Nickel oxide nanotubes with great antibacterial activities, electrochemical capacitance, and magnetic properties have been synthesized through a precursor method with dimethylglyoxime as precipitant for the precursor, and the method has been developed for the synthesis of Ni/C nanorods.
![Benzo[lmn][3,8]phenanthroline-1,3,6,8(2H,7H)-tetrone, 2,7-di-4-pyridinyl-](/data/chemimg/102500/34151-49-0.png)
![Benzo[lmn][3,8]phenanthroline-1,3,6,8(2H,7H)-tetrone, 2,7-di-4-pyridinyl-](/data/chemimg/102500/34151-49-0_b.png)
