Co-reporter:Longfeng Li;Long Tian;Yongxing Liu;Dan Liu;Chengyu Li;Mingzhu Liu
CrystEngComm (1999-Present) 2017 vol. 19(Issue 16) pp:2195-2201
Publication Date(Web):2017/04/19
DOI:10.1039/C7CE00239D
A sub-micrometer PbS particle with hierarchical structure, in which each octahedron was composed of six self-defined sub-octahedrons, was captured as the intermediate product in an evolution process from a six-pod to an octahedral-shaped PbS crystal. Moreover, the six sub-octahedrons of each octahedron presented almost intact octahedral morphology as well. Cl− was found to be a good structure-directing agent that changed the growth habit of the PbS crystals and helped in the formation of a hierarchical octahedron (HO). Compared with other reported products with similar octahedral growth habit, the formation of a HO required a special equilibrium between a thermodynamic and kinetic growth regime, which resulted in the ratio of 3.46 of the average growth rate along the <100> direction to that along the <111> direction. The local supersaturation degree (LSD) around each individual nucleus was proposed to represent the real driving force that determined the different growth mechanisms. This study may be helpful for the design and synthesis of desired structures that are thermodynamically unstable.
Co-reporter:Mingzhu Liu, Mei Leng, Dan Liu, Fanglin Chen, Chengyu Li, and Cheng Wang
Inorganic Chemistry 2014 Volume 53(Issue 21) pp:11484-11491
Publication Date(Web):October 23, 2014
DOI:10.1021/ic501368y
Hierarchical cubelike submicrometer PbS particles consisting of truncated octahedrons, cuboctahedrons, and cubes were prepared in ethylene glycol solution under favorable high mole ratio of thiourea (Tu) to Pb(AC)2 (RS/Pb) via a pumping process. A qualitative analysis based on the classical nucleation theory coupled with the crystal growth theory is employed to interpret the observed experimental phenomena. By varying the concentration of reactants, RS/Pb, and reaction temperature, it is possible to tune the local supersaturation degree (LSD), which is determined by the number of nuclei and overall growth unit (or concentration), surrounding each growing particle that dictates the branching and faceting of PbS particle. Relatively high LSD that is required for branching growth could be achieved at lower concentration of Tu and reaction temperature. Increasing the concentration of Tu and reaction temperature resulted in less LSD and yielded cubic PbS particles.
Co-reporter:Zhanli Chai, Hui Wang, Quanyu Suo, Niri Wu, Xiaojing Wang and Cheng Wang
CrystEngComm 2014 vol. 16(Issue 17) pp:3507-3514
Publication Date(Web):10 Feb 2014
DOI:10.1039/C4CE00005F
Polycrystalline nanotubular Bi2Te3 and PbTe were synthesized through a high-temperature solution process using extracted metal-TOPO (trioctylphosphine oxide) precursors and Te nanowires as sacrificial templates. X-ray diffraction, scanning electron microscopy, transmission electron microscopy, selected area electron diffraction, and high-resolution transmission electron microscopy were employed to characterize the products. The formation of such a tubular nanostructure is proposed to be the result of the Kirkendall effect. Compared with single crystalline nanotubes, such a polycrystalline nanotubular structure is considered to have great influences on the thermal conductivity owing to the numerous grain boundaries. Transport properties of hot-pressed bulk samples formed by the as-prepared nanotubular products were investigated. Thermal conductivities of the hot-pressed nanotubular samples were greatly reduced by around 80%, compared to the melt ones.
Co-reporter:Yong Zhang;Fang Fang;Lidan Wang;Xujie Wang;Xueying Chu;Jinhua Li;Xuan Fang;Zhipeng Wei;Xiaohua Wang
Polymer Composites 2014 Volume 35( Issue 6) pp:1204-1211
Publication Date(Web):
DOI:10.1002/pc.22769
The γ-methacryloxypropyltrimethoxysilane (γ-MPS) has been employed to make hydrophilic surface of ZnO nanostructures into hydrophobic or superhydrophobic surface. Such chemical process, which binds ZnO nanostructures and organic silane together, makes the combination of organic and inorganic materials more durable and stable. Furthermore, modification of different morphologies of ZnO nanostructures has an exceptional wide field of application. Modification of ZnO nanostructures using silane coupling agent γ-MPS can produce the hydrophobic surface of ZnO, and moreover it is expected to further synthesize of many hydrophobic organic–inorganic composite materials. POLYM. COMPOS., 35:1204–1211, 2014. © 2013 Society of Plastics Engineers
Co-reporter:Lidan Wang, Zisheng Su, Cheng Wang
Organic Electronics 2013 Volume 14(Issue 4) pp:1163-1169
Publication Date(Web):April 2013
DOI:10.1016/j.orgel.2013.02.004
A new approach is exploited to realize nonvolatile organic write-once–read-many-times (WORM) memory based on copper phthalocyanine (CuPc)/hexadecafluoro-copper-phthalocyanine (F16CuPc) p–n junction. The as-fabricated device is found to be at its ON state and can be programmed irreversibly to the OFF state by applying a negative bias. The WORM device exhibits a high ON/OFF current ratio of up to 2.6 × 104. An interfacial dipole layer is testified to be formed and destructed at the p–n junction interface for the ON and OFF states, respectively. The ON state at positive voltage region is attributed to the efficient hole and electron injection from the respective electrodes and then recombination at the CuPc/F16CuPc interface, and the transition of the device to the OFF state results from the destruction of the interfacial dipole layer and formation of an insulating layer which restricts charge carrier recombination at the interface.Graphical abstractHighlights► Organic WORM memory device based on CuPc/F16CuPc p–n junction. ► The as fabricated device exhibits an ON state and it can be turned to OFF state by a reverse bias. ► The ON/OFF current ratio reaches up to 2.6 × 104. ► Interfacial dipole is formed in the CuPc/F16CuPc p–n junction. ► The ON/OFF transition is controlled by the interfacial dipole formation and destruction.
Co-reporter:Mingzhu Liu, Ya Yan, Lan Zhang, Xin Wang and Cheng Wang
Journal of Materials Chemistry A 2012 vol. 22(Issue 23) pp:11458-11461
Publication Date(Web):20 Apr 2012
DOI:10.1039/C2JM31484C
Deflated-balloon-like and crumpled carbon nanosheets were prepared via a low-temperature hydrothermal carbonization of glucose at the two-phase interfaces. A low amount of glucose and a high amount of sodium dodecyl sulfate were found to be propitious to the formation of graphitic carbon nanosheets with low thickness. Their applications as supercapacitive materials were demonstrated.
Co-reporter:Yu Zhang, Xiao Wang, Shuyan Song, Dapeng Liu and Cheng Wang
CrystEngComm 2012 vol. 14(Issue 22) pp:7552-7555
Publication Date(Web):02 Jul 2012
DOI:10.1039/C2CE25253H
A facile solid–liquid interfacial synthetic strategy has been developed to synthesize Au–PbS hybrid nanocrystals via a thermolysis process. The size of the obtained Au–PbS hybrid nanocrystals could be tuned by varying the amounts of HAuCl4 introduced into the reaction system. A mutual inhibition of particle growth for both components in the hybrid nanocrystals has been observed during the synthetic process.
Co-reporter:Chao Yu, Mei Leng, Mingzhu Liu, Yang Yu, Dan Liu and Cheng Wang
CrystEngComm 2012 vol. 14(Issue 10) pp:3772-3777
Publication Date(Web):13 Mar 2012
DOI:10.1039/C2CE06624F
Normal and flattened rhombic dodecahedral sub-micrometer Ag2S particles were synthesized by a facile hydrothermal method. The effects of molar ratio of thiourea (Tu) to AgNO3 and volume of concentrated HCl aqueous solution on the morphologies of Ag2S particles have been systematically investigated. Experimental results indicated that the formation of soluble Ag-Tu complexes was a key issue to regulate the morphology of final products. The stability and decomposition of the soluble complexes were found to be dependent on the molar ratios of Tu to AgNO3 and HCl. A body-centered cubic to monoclinic phase-transfer mechanism was proposed to explain the formation of regularly morphological Ag2S particles.
Co-reporter:Mei Leng, Chao Yu and Cheng Wang
CrystEngComm 2012 vol. 14(Issue 24) pp:8454-8461
Publication Date(Web):03 Oct 2012
DOI:10.1039/C2CE26295A
In this study, we have successfully achieved a systematic and precise shape control of Cu2O nano- and microcrystals in alkaline aqueous solution using ascorbic acid (Vc) as the reductant. A morphological evolution of Cu2O polyhedra from cubic to 18-facet octahedral, small Rhombicuboctahedral (sR), 50-facet polyhedral and truncated octahedral could be attained by increasing the concentration of NaOH in the range of 0.05 to 2.0 mol L−1. In order to prepare octahedral particles, ethanol was added to the alkaline solution. The morphological evolution was interpreted from both a geometrical point of view and the variant affinity between OH− and different crystalline planes. The shape- and size-dependent catalytic activity of the as-prepared Cu2O polyhedral particles was examined on the cross-coupling reaction of iodobenzene and phenol.
Co-reporter:Dan Liu;Yongxin Liu;Guohai Xu;Guanghua Li;Yang Yu
European Journal of Inorganic Chemistry 2012 Volume 2012( Issue 28) pp:4413-4417
Publication Date(Web):
DOI:10.1002/ejic.201200851
Abstract
Two 3D supramolecular isomers with composition Co2(BDC)2(BPNO) (BPNO = 4,4′-bipyridyl N,N′-dioxide, BDC = 1,4-benzenedicarboxylic acid) were prepared by using mixed ligands in different solvents. The two compounds are built up from different infinite chains of corner-sharing CoO6 octahedra. In compound 1, 2D Co–BDC layers are pillared by neutral BPNO to form a 3D framework, while in compound 2, the interconnection between the zig-zag Co–O chains and two organic moieties leads to a Co-based MIL-53 analogue containing 1D nanosized rhombic channels. Compound 1 is a weak ferromagnet with two field-induced magnetic transitions, and compound 2 displays antiferromagnetic interactions. Furthermore, compound 1 shows a typical solvatomagnetic effect and its desolvated compound appears to be a hidden weak ferromagnet with two field-induced magnetic transitions. The structural variation between compounds 1 and 2 is ascribed to the different host–guest interactions within the two compounds and is believed to be responsible for the difference in the magnetic properties. As a result of their identical framework composition, compounds 1 and 2, after removal of the guest molecules, exhibited similar gas adsorption behavior.
Co-reporter:Xiyan Li, Yongqian Lei, Xiaona Li, Shuyan Song, Cheng Wang, Hongjie Zhang
Solid State Sciences 2011 Volume 13(Issue 12) pp:2129-2136
Publication Date(Web):December 2011
DOI:10.1016/j.solidstatesciences.2011.08.011
α-Fe2O3 nanocrystals (NCs) with different morphologies are successfully synthesized via a facile template-free hydrothermal route. By simply changing the volume ratio of ethanol to water, we obtained three different α-Fe2O3 nanostructures of rhombohedra, truncated rhombohedra and hexagonal sheet. The morphologies and structures of the as-obtained products have been confirmed by varieties of characterizations such as X-ray diffraction (XRD), X-ray photoelectron spectrometry (XPS), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). The influences of the experimental conditions, such as the amount of NaOH and reaction temperature on the morphologies of the as-prepared α-Fe2O3 NCs, have been well investigated. Additionally, magnetic investigations show that the as-obtained α-Fe2O3 nanostructures show structure-dependent magnetic properties. Furthermore, the electrochemical experiments indicate that the as-prepared α-Fe2O3 hexagonal sheets exhibit strong electrocatalytic reduction activity for H2O2.Highlights► α-Fe2O3 nanocrystals with different morphologies are successfully synthesized via a facile template-free hydrothermal route. ► By simply changing the volume ratio of ethanol to water, three different nanostructures were obtained. ► The as-prepared α-Fe2O3 hexagonal sheets exhibited strong electrocatalytic reduction activity for H2O2.
Co-reporter:Guohai Xu ; Xiaoguang Zhang ; Peng Guo ; Chengling Pan ; Hongjie Zhang
Journal of the American Chemical Society 2010 Volume 132(Issue 11) pp:3656-3657
Publication Date(Web):March 2, 2010
DOI:10.1021/ja910818a
Four MnII-based MIL-53 single crystals were prepared using four neutral pyridine N-oxides as bridging μ2-ligands. In the case of 4,4′-bipridine-N,N′-dioxide (BPNO), the infinite manganese oxide chains were further interconnected by BPNO besides BDC, which allows 1D channels to be accessible for guest molecules. The liquid-phase adsorption and separation of C6−C8 aromatics using the evacuated compound as an absorbent were investigated via crystal-to-crystal transformations. Both structural evolution of the compounds and selectivity of C6−C7 aromatics of one evacuated compound could be attributed to noncovalent interactions, especially π−π interaction.
Co-reporter:Mei Leng ; Mingzhu Liu ; Yibo Zhang ; Zhenqing Wang ; Chao Yu ; Xiangguang Yang ; Hongjie Zhang
Journal of the American Chemical Society 2010 Volume 132(Issue 48) pp:17084-17087
Publication Date(Web):November 12, 2010
DOI:10.1021/ja106788x
Micro- and nanoparticles with high-index facets may exhibit higher chemical activities that are of great importance in practical applications. Cuprite is a potential alternative to expensive noble metals as the catalyst for CO oxidation at moderate temperatures. We report here a solution based approach to the preparation of unusual polyhedral 50-facet Cu2O microcrystals with a morphological yield higher than 70%. It has been revealed that the concentration of OH− and the volume ratio of polar organic solvent to water in the mixed solvent play crucial roles in controlling the morphology of Cu2O microcrystals. The formation of the 50 facets could be geometrically viewed as the truncation of all the 24 vertices of a small rhombicuboctahedron having 26 facets. When growing from solutions, however, the anisotropic growth rates along the ⟨100⟩, ⟨110⟩, and ⟨111⟩ directions might be responsible for the formation of this morphology. The Miller index of the 24 nearly isosceles trapezoids could be assigned to {311} planes based on geometrical analysis and was verified by simulated models using the WinXmorph software and supported by TEM and ED observations. Compared with other polyhedral Cu2O microcrystals, the as-prepared microcrystals showed a higher specific catalytic rate toward CO oxidation.
Co-reporter:Zhanli Chai;Hongjie Zhang;Cara M. Doherty;Bradley P. Ladewig;Anita J. Hill;Huanting Wang
Advanced Functional Materials 2010 Volume 20( Issue 24) pp:4394-4399
Publication Date(Web):
DOI:10.1002/adfm.201001412
Abstract
Nafion–carbon (NC) composite membranes were prepared by hydrothermal treatment of Nafion membrane impregnated with glucose solution. The carbon loading of the NC membrane was tuned by controlling the hydrothermal carbonization time. X-ray diffraction, Fourier-transform infrared spectroscopy, scanning electron microscopy, thermogravimetric analysis, and positron annihilation lifetime spectroscopy were used to characterize plain Nafion and NC composite membranes. Nafion–carbon composite membranes exhibited better proton conductivity and reduced methanol permeability than those of the plain Nafion membrane. A single cell prepared with the NC composite membrane with a carbon loading of 3.6 wt% exhibited the highest cell performance. Compared with the cell performance of plain Nafion membrane, the maximum power density of the new cell improved by 31.7% for an H2/O2 fuel cell at room temperature, and by 44.0% for a direct methanol fuel cell at 60 °C.
Co-reporter:Zhanli Chai, Dehua Dong, Cheng Wang, Hongjie Zhang, Paul A. Webley, Dongyuan Zhao, Huanting Wang
Journal of Membrane Science 2010 Volume 356(1–2) pp:147-153
Publication Date(Web):1 July 2010
DOI:10.1016/j.memsci.2010.04.001
Nanoporous niobium phosphate (Nb–P) electrolyte membranes were prepared by dry pressing Nb–P nanoparticles for low temperature fuel cells. Highly dispersible Nb–P nanoparticles were synthesized by dispersing Nb–P precursor in furfuryl alcohol, which was polymerized to poly(furyfuryl alcohol) as a space-confinement additive during calcination. SEM, TEM and a range of spectroscopies were used to characterize Nb–P particles and membranes (discs). Nanoporous Nb–P membrane exhibited high proton conductivity (17.4 mS cm−1), low methanol permeability (1.1 × 10−7 cm2 s−1) whereas Nb–P membrane prepared from Nb–P particles synthesized without adding furfuryl alcohol had poor proton conductivity (0.341 mS cm−1) and high methanol permeability (3.13 × 10−5 cm2 s−1). The cell prepared with nanoporous Nb–P membrane showed good cell performance when operated as both H2–O2 fuel cell at room temperature and as DMFC at 60 °C; also this cell performs better than the cell with Nafion membrane at a current density of <72 mA cm−2, and its peak power density is comparable to the cell with Nafion membrane.
Co-reporter:Zhenqing Wang, Gongfeng Xu, Yanfeng Bi and Cheng Wang
CrystEngComm 2010 vol. 12(Issue 11) pp:3703-3707
Publication Date(Web):
DOI:10.1039/C002873H
Co-reporter:Mingzhu Liu;Mei Leng;Chao Yu;Xin Wang
Nano Research 2010 Volume 3( Issue 12) pp:843-851
Publication Date(Web):2010 December
DOI:10.1007/s12274-010-0055-z
Two-dimensional (2-D) Ag nanoplates have surface plasmon resonances which can be tuned from the visible to the near-IR by varying the size and morphology of the nanoplates. Due to their anisotropic structures and different surface energy distributions, Ag nanoplates—especially triangular ones—are kinetically stable and can transform into other nanostructures. Taking advantage of the synergetic effects of HNO3 and Cl− in the reduction solution, uniform Ag hexagonal nanoplates (HNPs) have been captured during the transformation of Ag triangular nanoplates (TNPs). The dimensions of the Ag HNPs can be controlled by changing the concentrations of reagents in the reaction or/and reduction solutions. Resonance absorption spectra of the obtained Ag HNPs indicated that their in-plane resonance peaks could be tuned from the visible to the near-IR region, showing their potential applications in medical diagnosis.
Co-reporter:Zhenqing Wang ; Hongjie Zhang
Inorganic Chemistry 2009 Volume 48(Issue 17) pp:8180-8185
Publication Date(Web):July 31, 2009
DOI:10.1021/ic900456t
Four transition-metal−amine complexes incorporating indium thioarsenates with the general formula M(tren)InAsS4 (M = Mn, Co, and Zn) and a noncondensed AsS33− unit have been prepared and characterized. Single-crystal X-ray diffraction analyses show that compound 1 (M = Mn) crystallizes in the triclinic crystal system (space group: P1̅) and consists of a one-dimensional (1D) inorganic 1∞{[InAsS4]2−} chain and [Mn(tren)]2+ groups bonded to the opposite sides of an eight-membered In2As2S4 ring along the backbone of the infinite inorganic chains. Compounds 2 (M = Mn), 3 (M = Zn), and 4 (M = Co) are isomorphous molecular compounds. They all crystallize in the monoclinic crystal system (space group: P21/c). The Mn2+ cation of [Mn(tren)]2+ in 1 has a distorted octahedral environment, while the transition-metal cations of [M(tren)]2+ in the other three compounds locate in trigonal-bipyramidal environments. This difference results in different bonding modes of [M(tren)]2+ to indium thioarsenates between compound 1 and the other three compounds.
Co-reporter:Guohai Xu, Peng Guo, Shuyan Song, Hongjie Zhang and Cheng Wang
Inorganic Chemistry 2009 Volume 48(Issue 11) pp:4628-4630
Publication Date(Web):April 16, 2009
DOI:10.1021/ic900376h
A multinary molecular nanocluster, in which a T3 supertetrahedral [Sn4Ga4Zn2Se20]8− core was neutralized and covalently terminated by four [(TEPA)Mn]2+ (TEPA = tetraethylenepentamine) metal complexes, was synthesized and characterized. The cluster is assembled into, through hydrogen bonding and van de Waals forces, a superlattice that is chemically stable and free of strong covalent coupling. The four different cations were distributed within the cluster in such a manner that both the local charge balance and global charge compensation by the metal complex could be satisfied.
Co-reporter:Xiaoguang Zhang, Xin Ge, and Cheng Wang
Crystal Growth & Design 2009 Volume 9(Issue 10) pp:4301
Publication Date(Web):September 18, 2009
DOI:10.1021/cg801015b
The phase and morphology variations of titania prepared in ethanol/acetic acid mixture solvents have been systematically investigated. X-ray diffraction results and microscopy observations reveal that pure anatase aggregates consisted of small nanoparticles, pure rutile microspheres comprised of nanofibers, and their mixtures could be obtained by varying ratios of ethanol to acetic acid under solvothermal conditions. The contents of anatase and rutile in the mixed phases also vary with the ratios of ethanol to acetic acid. Field emission scanning electron microscopy and high resolution transmission electron microscopy results show that the two phases are separated from each other in final products and form aggregates with morphologies resembling to their pure phase products obtained under favorable conditions. The as-produced rutile nanofibers, either in pure phase or in mixed phases, tend to grow into hollow microspheres. An interfacial growth model is proposed for describing the formation of such microspheres. The degradations of methyl orange in aqueous solutions in the presence of as-prepared titania under UV irradiation were used as a probe for evaluating their photocatalytic activities.
Co-reporter:Zhanli Chai, Zeping Peng, Cheng Wang, Hongjie Zhang
Materials Chemistry and Physics 2009 Volume 113(2–3) pp:664-669
Publication Date(Web):15 February 2009
DOI:10.1016/j.matchemphys.2008.07.121
Polycrystalline nanotubular Bi2Te3 could be prepared via a high-temperature solution process using nanoscale tellurium, decomposed from trioctylphosphine oxide (TOPO) extracted tellurium species (Te-TOPO), as sacrificial template. The formation of such tubular structure is believed to be the result of outward diffusion of Te during the alloying process. The electrical properties (Seebeck coefficient and electrical conductivity) of the polycrystalline nanotubular Bi2Te3 have been studied and the experimental results show that the electrical conductivity is approximately three orders of magnitude smaller than bulk bismuth telluride materials mainly due to the much larger resistance brought by the insufficient contact between the nanotubular structures.
Co-reporter:Rongguo Chen, Xiaoguang Zhang, Zhaohui Su, Rui Gong, Xin Ge, Hongjie Zhang and Cheng Wang
The Journal of Physical Chemistry C 2009 Volume 113(Issue 19) pp:8350-8356
Publication Date(Web):2017-2-22
DOI:10.1021/jp8114622
Perfectly hydrophobic (PHO) coatings consisting of silicone nanofibers have been obtained via a solution process using methyltrialkoxysilanes as precursors. On the basis of thermal gravimetry and differential thermal analysis (TG-DTA) and Fourier transform infrared spectroscopy (FTIR) results, the formula of the nanofibers was tentatively given and a possible growth mechanism of the nanofibers was proposed. Because of the low affinity between the coatings and the small water droplet, when using these coatings as substrate for collecting water vapor, the harvesting efficiency could be enhanced as compared with those from bare glass substrate for more than 50% under 25 °C and 60−90% relative humidity. By removing the surface methyl group by heat treatment or ultraviolet (UV) irradiation, the as-prepared perfectly hydrophobic surface can be converted into a superhydrophilic surface.
Co-reporter:Li Gao;Xin Ge;Zhanli Chai;Guohai Xu;Xin Wang
Nano Research 2009 Volume 2( Issue 7) pp:565-574
Publication Date(Web):2009 July
DOI:10.1007/s12274-009-9056-1
Submicrometer sized pure cubic phase, Eu3+ doped, and Yb3+/Er3+ co-doped α-NaYF4 particles with octahedral morphology have been prepared in acetic acid. The acetate anion plays a critical role in the formation of such symmetric octahedral structures through its selective adsorption on the (111) faces of the products. The size of the as-prepared octahedra can be tuned by varying the amount of sodium acetate added to the acetic acid. A possible formation mechanism for these octahedra has been proposed. The doped α-NaYF4 octahedral submicrometer particles show down-conversion and up-conversion photoluminescence typical of these materials.
Co-reporter:Zeping Peng, Yusheng Jiang, Yonghai Song, Cheng Wang and Hongjie Zhang
Chemistry of Materials 2008 Volume 20(Issue 9) pp:3153
Publication Date(Web):April 12, 2008
DOI:10.1021/cm703707v
Nanostructured PbS with different morphologies and particle sizes have been prepared through a polyol process. Narrow size distribution for star-shaped, octahedral, tetradecanehedral, and cubic products were achieved by slowly introducing the source materials using a peristaltic pump in the presence of poly(vinylpyrrolidone) (PVP) as additive. Systematic variation of the kinetic factors, including the additive, the reaction temperature, the duration time, the ratio of source materials, the sulfur sources, and the Pb(Ac)2·3H2O concentration, reveals that the morphology depends mainly on the supersaturation degree of the free sulfur ions released from thiourea under elevated temperature. Semiquantitative analysis based on the X-ray diffraction (XRD) patterns of these products gives that the peak area ratio of (200) to (111) increases with the increase of the supersaturation degree within the reaction system. The four types of symmetric morphology showed different oxidation stability toward the 514.5 nm argon ion laser irradiation when the power was set at 12.5 mW.
Co-reporter:Mingzhu Liu, Ya Yan, Lan Zhang, Xin Wang and Cheng Wang
Journal of Materials Chemistry A 2012 - vol. 22(Issue 23) pp:NaN11461-11461
Publication Date(Web):2012/04/20
DOI:10.1039/C2JM31484C
Deflated-balloon-like and crumpled carbon nanosheets were prepared via a low-temperature hydrothermal carbonization of glucose at the two-phase interfaces. A low amount of glucose and a high amount of sodium dodecyl sulfate were found to be propitious to the formation of graphitic carbon nanosheets with low thickness. Their applications as supercapacitive materials were demonstrated.
