Co-reporter:Zhenxing Fang, Shihui Jiao, Boran Wang, Wen Yin, Shuwei Liu, Ruiqin Gao, Zihe Liu, Guangsheng Pang, Shouhua Feng
Materials Today Energy 2017 Volume 6(Volume 6) pp:
Publication Date(Web):1 December 2017
DOI:10.1016/j.mtener.2017.09.014
The cubic phase WO3−x with two-dimensional nanosheet structure is prepared at a relative low temperature through thermal decomposition method. The starting material and decomposition environment are the key factors to obtain the cubic phase WO3−x. The cubic crystal structure is stabilized by the large amounts of oxygen vacancies. The dark blue cubic WO3−x exhibits electrocatalysis performance for hydrogen evolution reaction (HER) in acidic solution (an overpotential −294 mV at the current density of 10 mA/cm2). The cubic phase WO3−x shows good photothermal stability with eminent photothermal conversion effect (photothermal conversion efficiency is 48.7% at 808 nm).Download high-res image (165KB)Download full-size image
Co-reporter:Yue Zhao, Qingsen Zeng, Xu Liu, Shihui Jiao, Guangsheng Pang, Xiaohang Du, Kai Zhang and Bai Yang
Journal of Materials Chemistry A 2016 vol. 4(Issue 30) pp:11738-11746
Publication Date(Web):28 Jun 2016
DOI:10.1039/C6TA03585J
In this work, a novel environmentally friendly approach to deposit TiO2 films via an aqueous process is developed. The atomic force microscopy (AFM) measurement indicates that water-dispersed TiO2 nanocrystals (NCs) show excellent film-forming properties on an ITO-coated glass substrate. In addition, the femtosecond transient absorption (TA) and conductivity measurements suggest that the aqueous-processed TiO2 film shows excellent electron extraction ability and good conductivity. The aqueous-processed polymer/NC hybrid solar cells based on the aqueous-processed TiO2 electron extraction layer present superior photovoltaic performance and a PCE of 5.53% is achieved, which is the highest for hybrid solar cells fabricated via an aqueous process. Finally, the solar cells with the aqueous-processed TiO2 electron extraction layer exhibit better humidity resistance compared to the TiO2 film deposited via a sol–gel method.
Co-reporter:Yan Chen, Ye Xu, Shihui Jiao, Xiyang Wang, Lu Li, Zhenxing Fang, Guangsheng Pang, Shouhua Feng
Dyes and Pigments 2016 Volume 129() pp:191-198
Publication Date(Web):June 2016
DOI:10.1016/j.dyepig.2016.02.017
•A hydrothermal method was developed to synthesize blue TiO2 nanoparticles.•The reaction of Fe with Ti4+ can lead to the formation of Fe2+ and Ti3+ centers.•Ti3+ ions can in situ reduce noble meal salts to form noble metal nanoclusters.•The noble metal nanoparticles were in suit deposited with homogeneous separation.•The samples show effectively photocatalysis and CO oxidation abilities.Fe2+ and Ti3+ co-doped anatase TiO2 nanocrystallites with ca. 50% exposed {001} facets have been successfully synthesized by a facile hydrothermal method. The transition metal dopant induces the stability of Ti3+ ions in the structure. As-prepared anatase TiO2 exhibits a broad absorbance in the visible light region, which shows blue colour. Furthermore, these Ti3+ ions can in situ reduce the noble metal cations to neutral atoms, which form homogeneously nanoclusters on the TiO2 surface. The noble metal anchored samples show enhanced photocatalysis compared to the original Fe,Co-doped TiO2 sample under ultraviolet light. Among the noble metal anchored samples, Pd@Fe3–TiO2 can completely oxidize CO at the mild temperature above 250 °C.
Co-reporter:Weijie Duan;Shihui Jiao;Xu Liu;Jinlei Chen
Chemical Research in Chinese Universities 2015 Volume 31( Issue 2) pp:179-186
Publication Date(Web):2015 April
DOI:10.1007/s40242-015-5033-2
Two supramolecular compounds [Cu(imz)2][Cu(phen)(imz)]2{[Cu(phen)]2[PMo6VIMo6VV2IVO42]}(1) and [Co2(2,2′-bpy)4(C2O4)][Co(2,2′-bpy)3][PMo7VIMo5VV2IVO42](2,2′-bpy)0.5·H2O(2)(phen=1,10′-phenanthroline, imz= imidazole, 2,2′-bpy=2.2′-bipyridine) have been synthesized hydrothermally and characterized by elemental analyses, infrared spectrum, UV-Vis, X-ray photoelectron spectroscopy(XPS), electron spin resonance(ESR) spectra, thermogravimetry analyses and single crystal X-ray diffraction analyses. Single-crystal X-ray diffraction analyses revealed that both the compounds represent the examples of compounds based on the bi-capped Keggin polyoxoanion {PMo12V2O42} and transition metal mixed-organic-ligand coordination complexes. Compound 1 consists of bi-capped Keggin polyoxoanion [PMo12V2O42]5− supported copper coordination groups, which are further inter-connected with two types of copper complex fragments forming a 3D supramolecular framework via π⋯π stacking, C-H⋯O and N-H⋯O hydrothermal bonding interactions. Compound 2 is a new hybrid consisted of polyoxoanion [PMo12V2O42]4−, [Co2(2,2′-bpy)4(C2O4)]2+ and [Co(2,2′-bpy)3]2+. There are no direct interactions in compound 2, but the polyoxoanions together with two different cobalt complex groups construct a 3D supramolecular network through C-H⋯O hydrogen bonding interactions.
Co-reporter:Xu Liu;Yan Chen;Shihui Jiao
Chemical Research in Chinese Universities 2015 Volume 31( Issue 5) pp:688-692
Publication Date(Web):2015 October
DOI:10.1007/s40242-015-5300-2
A facile approach was developed to prepare highly dispersed TiO2 nanoparticles with selected phase. The crystallization phase of the nanoparticles can be easily tuned from anatase to rutile by the dosage of hydrochloric acid in the reaction system. The crystallite size of the as-prepared anatase TiO2 nanoparticles was ca. 3.2 nm with high dispersion. A transparent TiO2 colloid was obtained by dispersing the as-prepared anatase TiO2 nanoparticles in deionized water without any organic additives added. The concentration of TiO2-H2O colloid can be as high as 1600 g/L. The optical transmittance of TiO2-H2O colloid with a low concentration was nearly 100% in the visible region. Furthermore, anatase TiO2 nanoparticles(TiO2-NPs) showed superior photocatalytic performance compared to rutile TiO2-NPs.
Co-reporter:Xuan Cao, Yan Chen, Shihui Jiao, Zhenxing Fang, Man Xu, Xu Liu, Lu Li, Guangsheng Pang and Shouhua Feng
Nanoscale 2014 vol. 6(Issue 21) pp:12366-12370
Publication Date(Web):21 Aug 2014
DOI:10.1039/C4NR03729D
Magnetic n-type semiconductor Fe3O4 nanoparticle and p-type semiconductor FeWO4 nanowire heterostructures were successfully synthesized without any surfactants or templates via a facile one-step hydrothermal process at 160 °C. The heterojunction structure and morphology were characterized by X-ray powder diffraction (XRD), transmission electron microscopy (TEM) and high-resolution transmission electron microscopy (HRTEM). Magnetic measurements indicated the coexistence of ferrimagnetic behavior of Fe3O4 and weak antiferromagnetic behavior of FeWO4. The degradation of methylene blue (MB) under UV-Visible light irradiation was studied as a model experiment to evaluate the catalytic activity of the Fe3O4/FeWO4 heterostructure p–n junctions. The decomposition efficiency was 97.1% after one hour UV-Visible irradiation. This magnetic photocatalyst can be easily recovered from the solution using a permanent magnet and redispersed by removing the magnet.
Co-reporter:Jinlei Chen, Fei-Yan Yi, Hong Yu, Shihui Jiao, Guangsheng Pang and Zhong-Ming Sun
Chemical Communications 2014 vol. 50(Issue 72) pp:10506-10509
Publication Date(Web):21 Jul 2014
DOI:10.1039/C4CC04614E
Detecting volatile amines is a significant topic in the quality control of food and medical diagnosis. We report the first Eu-coordination polymer (CP) as a sensory material for the detection of a class of amine vapors with high selectivity and rapid response.
Co-reporter:Chao Liu, Gao Li, Douglas R. Kauffman, Guangsheng Pang, Rongchao Jin
Journal of Colloid and Interface Science 2014 Volume 423() pp:123-128
Publication Date(Web):1 June 2014
DOI:10.1016/j.jcis.2014.02.022
•A synthetic method for ultrasmall Pt nanoparticles (∼1 nm) is developed.•Compared to bulk Pt, structural relaxation is observed in the Pt nanoparticles.•The Pt 4f core level energy shifts positively by +1 eV compared with bulk Pt.We report the synthesis of ligand-protected, ultrasmall Pt nanoparticles of ∼1 nm size via a one-phase wet chemical method. Using matrix-assisted laser desorption ionization mass spectrometry (MALDI-MS), we determined the mass of the nanoparticles to be ∼8 kDa. Characterization of the Pt nanoparticles was further carried out by powder X-ray diffraction (XRD), transmission electron microscopy (TEM), thermogravimetric analysis (TGA), optical absorption spectroscopy, and X-ray photoelectron spectroscopy (XPS). Interestingly, we observed a large structural relaxation in the 8 kDa nanoparticles (i.e. lattice parameter elongation by +10%) compared to bulk platinum. XPS analysis revealed a positive shift of Pt 4f core level energy by approximately +1 eV compared with bulk Pt, indicating charge transfer from Pt to S atom of the thiolate ligand on the particle. Compared to bulk Pt, the 5d band of Pt nanoparticles is narrower and shifts to higher binding energy. Overall, the ∼1 nm ultrasmall Pt nanoparticles exhibit quite distinct differences in electronic and structural properties compared to their larger counterparts and bulk Pt.
Co-reporter:Yong Nam Han, Shihui Jiao, Man Xu, Yaohua Xu, Guangsheng Pang and Shouhua Feng
RSC Advances 2014 vol. 4(Issue 46) pp:24142-24146
Publication Date(Web):23 May 2014
DOI:10.1039/C4RA02722A
KNbWO6·H2O:xEu3+ is prepared by ion exchange under hydrothermal conditions. Three K+ ions of KNbWO6·H2O are exchanged for one Eu3+ ion and KNbWO6·H2O:xEu3+ keeps its defect pyrochlore structure. Thermal analysis results indicate that the Eu3+ ion incorporates into the channels of the defect pyrochlore structure in the form of the aqueous ion [Eu(H2O)n]3+. [Eu(H2O)n]3+ in the channel looses water at 450 °C, which is much higher than that of KNbWO6·H2O. The hydration of the Eu3+ ion in the pyrochlore structure has significant influence on the luminescence properties of KNbWO6·H2O:xEu3+. The emission intensity increases 10 times when the as-prepared KNbWO6·H2O:xEu3+ is annealed at 450 °C for 2 h.
Co-reporter:Yong Nam Han, Shihui Jiao, Man Xu, Guangsheng Pang and Shouhua Feng
RSC Advances 2014 vol. 4(Issue 28) pp:14357-14360
Publication Date(Web):03 Feb 2014
DOI:10.1039/C3RA47190J
The octahedral defect pyrochlore KNbWO6·H2O is prepared by a two-step solvothermal process. It shows an excellent performance in the removal of toxic Pb2+ by ion exchange. The removal process fits well with the Langmuir isotherm, and the maximum removal capacity is 86.95 mg g−1 at pH 5.0. High selectivity to Pb2+ is observed in an aqueous solution also containing Mn2+, Cd2+ and Co2+. The kinetics of the ion exchange process can be expressed by the pseudo-second-order rate kinetic model.
Co-reporter:Shiyao Zhu, Shihui Jiao, Ziwei Liu, Guangsheng Pang and Shouhua Feng
Environmental Science: Nano 2014 vol. 1(Issue 2) pp:172-180
Publication Date(Web):27 Feb 2014
DOI:10.1039/C3EN00078H
CuZn hydroxyl double salts (CuZn–HDS) were prepared using the same synthesis method of LHZS by adding a copper source. When tested as adsorbents for methyl orange (MO) removal, CuZn–HDS exhibited better performance than layered hydroxyl zinc salt (LHZS). CuZn-1 had a surface area of 33.8 m2 g−1 and displayed a maximum adsorption capacity of 847 mg g−1 for MO, which made it a potentially attractive adsorbent in water purification. The adsorption process followed a pseudo-second-order kinetic model, and the adsorption isotherm has been satisfactorily fitted using the Langmuir model. The adsorption mechanism for MO on CuZn-1 was also investigated.
Co-reporter:Dong Wang, Jianbo Sun, Xuan Cao, Yihan Zhu, Qingxiao Wang, Guangchao Wang, Yu Han, Geyu Lu, Guangsheng Pang and Shouhua Feng
Journal of Materials Chemistry A 2013 vol. 1(Issue 30) pp:8653-8657
Publication Date(Web):24 May 2013
DOI:10.1039/C3TA11506B
The inner structure of W18O49 mesocrystals was observed by electron microscopy with the help of ultramicrotomy and focused ion beam techniques. The results showed that these mesocrystals contain irregular mesopores formed through partial fusion of self-assembled nanowires, and consequently have long-range structural ordering in one dimension and short-range ordering in the other two dimensions. The W18O49 mesocrystals exhibit superior performance in gas sensing applications, which is considered to be associated with the presence of more oxygen vacancy sites in the unique mesoporous structure.
Co-reporter:Daxin Liang, Ruoshui Ma, Shihui Jiao, Guangsheng Pang and Shouhua Feng
Nanoscale 2012 vol. 4(Issue 20) pp:6265-6268
Publication Date(Web):23 Aug 2012
DOI:10.1039/C2NR31193C
Chalcopyrite CuFeS2 nanocrystals with a diameter of 6.4 nm were synthesized using a facile solution-phase method. Due to quantum confinement, the CuFeS2 nanocrystals exhibit a maximum ZT value of 0.264 at 500 K, which is 77 times the value of bulk chalcopyrite.
Co-reporter:Hongliang Li, Jingjing Sang, Junhua Zhao, Aiping Fu, Hui Liu, Man Xu, Guangsheng Pang and Xiu Song Zhao
New Journal of Chemistry 2012 vol. 36(Issue 11) pp:2308-2315
Publication Date(Web):24 Aug 2012
DOI:10.1039/C2NJ40595D
Air-stable metallic Co nanoparticles were incorporated into the pores or anchored onto the external surface of an ordered mesporous carbon/SBA-15 composite by simply treating the cobalt precursor-impregnated surfactant-containing SBA-15 via the Reaction under Autogenic Pressure at Elevated Temperature (abbreviated to RAPET) process, resulting in bifunctional Co@carbon/SBA-15 composites. Surfactant-containing mesoporous SBA-15 (denoted as surf-SBA-15 composite) was firstly impregnated with a cobalt precursor solution and then calcined under autogenic pressure at elevated temperature using a Swagelok-like high-temperature autoclave in an N2 atmosphere. During the RAPET process, the cobalt precursor impregnated into the channel of the surf-SBA-15 composites decomposed and was reduced by the surfactant species, meanwhile, the surfactant, which was used as a soft template for the formation of mesoporous silica, was carbonized and coated onto the internal and the external surface of mesoporous silica and partially onto the incorporated metallic Co nanoparticles, forming Co nanoparticles encapsulated by a mesoporous carbon/SBA-15 composite (mesoporous Co@carbon/SBA-15) in situ. The products were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), nitrogen adsorption–desorption measurements and X-ray diffraction (XRD). The influences of the concentration of cobalt precursors on the morphologies and the magnetic properties of the mesoporous Co@carbon/silica composites were studied. The adsorption/separation ability of the magnetic mesoporous composite to organic guest molecules and the stability of the nanosized metallic Co decorations in air or in an acid environment were also investigated.
Co-reporter:Ruoshui Ma, Feng Cao, Jian Wang, Guangrui Zhu, Guangsheng Pang
Materials Letters 2011 Volume 65(19–20) pp:2880-2882
Publication Date(Web):October 2011
DOI:10.1016/j.matlet.2011.06.084
CoNb2O6 was prepared by hydrothermal synthesis with polyvinyl alcohol as an additive. X-ray diffraction, scanning electron microscopy and transmission electron microscopy were used to investigate the lattice parameters and the particle morphology. The products were observed as irregular particles with an average particle size of ca. 500 nm, which agglomerated from thin slices. Compared with the common columbite CoNb2O6, which was obtained by a traditional solid-state reaction, the product obtained by the hydrothermal method crystallized into a rutile structure. The rutile CoNb2O6 was metastable and it could transform into the columbite structure after calcining at 800 °C in air for 4 h.Research highlights► Cobalt niobate with a rutile structure was prepared by hydrothermal synthesis. ► A transformation from rutile to columbite structure happens at 800 °C. ► The CoNb2O6 particles were formed by the agglomeration of thin slices.
Co-reporter:Yingwei Zhang;Chao Liu, ;Shihui Jiao;Shiyao Zhu;Dong Wang;Daxin Liang ;Shouhua Feng
European Journal of Inorganic Chemistry 2010 Volume 2010( Issue 8) pp:1275-1282
Publication Date(Web):
DOI:10.1002/ejic.200900853
Abstract
A novel CaNb2O6 hierarchical micro/nanostructure was successfully fabricated under mild hydrothermal conditions in the absence of templates or organic additives. In this hierarchical micro/nanostructure, the nanosheets grow vertically on the surface of the one-dimensional microneedles whose axial direction is along the c-axis, and the single crystalline nanosheets are parallel to the (020) planes. A two-step nucleation–growth mechanism is proposed to explain the formation of the CaNb2O6 hierarchical micro/nanostructure, based on the observation of a time-dependent morphology evolution process. The hierarchically structured CaNb2O6 exhibits a stronger enhancement of photocatalytic activity in the degradation of rhodamine B (RhB) than other morphological CaNb2O6 samples, such as nanoparticles, nanoribbons, and microneedles. This simple hydrothermal method provides a new general approach for the synthesis of potentially useful niobates.
Co-reporter:Shihui Jiao, Yan Chen, Man Xu, Yingwei Zhang, Dong Wang, Guangsheng Pang, Shouhua Feng
Materials Letters 2010 Volume 64(Issue 15) pp:1704-1706
Publication Date(Web):15 August 2010
DOI:10.1016/j.matlet.2010.05.007
α-Fe2O3 nanoparticles/TiO2 nanowires hybrid structure is fabricated by two-step hydrothermal treatment. TiO2 nanowires are prepared by heating of titanate nanowires, which are obtained by hydrothermal treatment of TiO2 powder and further repeated HCl treatment. α-Fe2O3 nanoparticles are deposited on the surface of TiO2 nanowires by hydrothermal treatment in Fe(NO3)3 solution. The HRTEM images confirm the junctions between α-Fe2O3 nanoparticles and TiO2 nanowires. The formation of hybrid structures has significant influence on the magnetic properties of α-Fe2O3. The Morin transition temperature of α-Fe2O3 nanoparticles/TiO2 nanowires hybrid structure is 190 K, which is determined by the sharp peak in the differential ZFC curve. Whereas there is no observable Morin transition for the corresponding isolated α-Fe2O3 nanoparticles with similar average particles size of ca. 20 nm.
Co-reporter:Yu Wang, Guangsheng Pang, Yan Chen, Shihui Jiao, Dong Wang, Shouhua Feng
Journal of Solid State Chemistry 2008 Volume 181(Issue 2) pp:217-220
Publication Date(Web):February 2008
DOI:10.1016/j.jssc.2007.11.019
Fe3+–Nb5+ co-doped SnO2 was prepared at 1200 °C by a simple chemical co-precipitation method. The Sn1−2xFexNbxO2 solid solutions kept cassiterite structure in the range of 0
Co-reporter:Ying Hou;Ming Yang;Shouhua Feng
Journal of Materials Science 2008 Volume 43( Issue 7) pp:2149-2152
Publication Date(Web):2008 April
DOI:10.1007/s10853-007-1958-2
In this work, ZnO microrods with etched surface are prepared by two-step hydrothermal reaction. ZnO microrods are prepared firstly by decomposing LHS-Zn under hydrothermal conditions. It is found that the (0001)-Zn face of ZnO microrods will dissolve partly due to the existence of LHS-Zn during further hydrothermal treatment, and ZnO microrods with etched surface are obtained. X-ray powder diffraction is used to determine the crystal structure, and scanning electron microscopy is used to observe the morphology of products. The photoluminescence spectra are investigated.
Co-reporter:Linfeng Jiang ; Ming Yang ; Shiyao Zhu ; Guangsheng Pang ;Shouhua Feng
The Journal of Physical Chemistry C 2008 Volume 112(Issue 39) pp:15281-15284
Publication Date(Web):September 5, 2008
DOI:10.1021/jp804705v
A series of ZnS nanostructures with controllable crystal phase and morphology were synthesized by a solvothermal method using Zn(NCS)2(C5H5N)2 as a precursor. Nanospheres, microflowers, and microspheres assembled with hexagonal or cubic nanocrystals were obtained in different solvents. Phase evolution of ZnS in polyols was also discussed. Hexagonal ZnS is stable in polyols with neighboring hydroxyl, whereas cubic ZnS is stable in polyols without neighboring hydroxyl. The ligation of hydroxyl groups with Zn atoms on the surface of ZnS is responsible for the phase evolution of ZnS in polyols.
Co-reporter:Muquan Yang;Yingwei Zhang;Shouhua Feng
European Journal of Inorganic Chemistry 2007 Volume 2007(Issue 24) pp:
Publication Date(Web):29 JUN 2007
DOI:10.1002/ejic.200700155
Cuprous oxide hollow nanospheres were prepared by heating a solution of copper acetate and hydrazine as a reductant in 2-propanol at reflux. The size distribution of the nanospheres is mainly in the range 100–200 nm. The products were characterized by X-ray diffraction, UV/Vis diffuse reflectance spectroscopy, SEM, and TEM. The results indicated that the Cu2O hollow nanospheres aggregated from small nanoparticles with an average size of ca. 6.6 nm. The UV/Vis diffuse reflectance spectrum indicated that the optical absorption edge of the hollow Cu2O nanospheres is redshifted relative to their solid counterparts. The influence of the reaction conditions, such as reaction temperature, reaction time, and the amount of water, on the formation of the nanospheres as well as their morphology were studied. (© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2007)
Co-reporter:Ying Hou;Shouhua Feng;Ming Yang
Crystal Research and Technology 2007 Volume 42(Issue 11) pp:1068-1072
Publication Date(Web):20 JUN 2007
DOI:10.1002/crat.200710947
The influence of annealing atmosphere on the optical properties of flower-like ZnO is investigated. The flower-like ZnO is composed of nanosheets. Annealing at 500°C results in the increase of the thickness of nanosheets and the enhancement of UV emission. PL spectra results show that the annealing atmosphere affects the visible emission band, which is sensitive to intrinsic and surface defects in the flower-like ZnO. The vibrational properties of the flower-like ZnO annealing in different atmospheres are characterized by Raman spectra. (© 2007 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)
Co-reporter:Shihui Jiao;Hongwei Liang;Yan Chen
Journal of Nanoparticle Research 2007 Volume 9( Issue 4) pp:605-610
Publication Date(Web):2007 August
DOI:10.1007/s11051-006-9083-8
Nanoparticles and nanorods of CuSb2O6 are prepared by hydrothermal method and its high temperature α-phase is stabilized at room temperature. The average size of the nanoparticles is ca. 13.7 nm. The nanorods, with a width of ca. 20 nm and an aspect ratio of ca. 5, are the agglomerates composing of smaller nanoparticles with an average size of ca. 8.3 nm. Compared with the high temperature α-phase of bulk sample at 400 K, the lattice of nanophases elongated in ab plane and compressed along c direction. The CuSb2O6 nanoparticles exhibit predominant paramagnetic phenomenon. The difference in magnetic properties of the nanoparticles and nanorods indicates the interfacial interaction of agglomerated nanoparticles.
Co-reporter:Ming Yang;Jixue Li;Linfeng Jiang;Shouhua Feng
European Journal of Inorganic Chemistry 2006 Volume 2006(Issue 19) pp:
Publication Date(Web):28 AUG 2006
DOI:10.1002/ejic.200600369
ZnO nanowires with diameters in the range of 10 to 30 nm and lengths of ca. several micrometers are prepared with the use of ZnO nanoparticles as building blocks. The length and diameter of the ZnO nanowires can be controlled by the variation of the concentration of the nanoparticles in the orientation attachment process. A plausible mechanism for the concentration-controlled orientation attachment process is suggested. (© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2006)
Co-reporter:Shangmei Sun, Li Yang, Guangsheng Pang, Shouhua Feng
Applied Catalysis A: General (15 July 2011) Volume 401(Issues 1–2) pp:
Publication Date(Web):15 July 2011
DOI:10.1016/j.apcata.2011.05.015
Mg-doped LaCoO3 particles were prepared in various particle sizes via a modified sol–gel method using excess MgO as pinning particles. The adsorbed oxygen species of the products were studied by XPS, TPD-O2 and TPR-H2. The amount of adsorbed oxygen varied with changes in average particle size and had an important effect on the catalytic activity towards CO oxidation. XPS and TPD-O2 results indicated that there were two kinds of surface oxygen species and that the relative ratio of the surface adsorbed oxygen to lattice oxygen increased with an increasing BET surface area. The catalytic activities of Mg-doped LaCoO3 particles were clearly enhanced with the increase of surface area and the amount of adsorbed oxygen.Graphical abstract.Download high-res image (116KB)Download full-size imageHighlights► Mg-doped LaCoO3 particles were prepared in various particle sizes. ► The particle size had influence on the adsorbed oxygen species. ► The adsorbed oxygen took effect on the catalytic activity of Mg-doped LaCoO3. ► The desorption temperature of oxygen varied with changes in average particle size.
Co-reporter:Yue Zhao, Qingsen Zeng, Xu Liu, Shihui Jiao, Guangsheng Pang, Xiaohang Du, Kai Zhang and Bai Yang
Journal of Materials Chemistry A 2016 - vol. 4(Issue 30) pp:NaN11746-11746
Publication Date(Web):2016/06/28
DOI:10.1039/C6TA03585J
In this work, a novel environmentally friendly approach to deposit TiO2 films via an aqueous process is developed. The atomic force microscopy (AFM) measurement indicates that water-dispersed TiO2 nanocrystals (NCs) show excellent film-forming properties on an ITO-coated glass substrate. In addition, the femtosecond transient absorption (TA) and conductivity measurements suggest that the aqueous-processed TiO2 film shows excellent electron extraction ability and good conductivity. The aqueous-processed polymer/NC hybrid solar cells based on the aqueous-processed TiO2 electron extraction layer present superior photovoltaic performance and a PCE of 5.53% is achieved, which is the highest for hybrid solar cells fabricated via an aqueous process. Finally, the solar cells with the aqueous-processed TiO2 electron extraction layer exhibit better humidity resistance compared to the TiO2 film deposited via a sol–gel method.
Co-reporter:Jinlei Chen, Fei-Yan Yi, Hong Yu, Shihui Jiao, Guangsheng Pang and Zhong-Ming Sun
Chemical Communications 2014 - vol. 50(Issue 72) pp:NaN10509-10509
Publication Date(Web):2014/07/21
DOI:10.1039/C4CC04614E
Detecting volatile amines is a significant topic in the quality control of food and medical diagnosis. We report the first Eu-coordination polymer (CP) as a sensory material for the detection of a class of amine vapors with high selectivity and rapid response.
Co-reporter:Shiyao Zhu, Shihui Jiao, Ziwei Liu, Guangsheng Pang and Shouhua Feng
Environmental Science: Nano 2014 - vol. 1(Issue 2) pp:NaN180-180
Publication Date(Web):2014/02/27
DOI:10.1039/C3EN00078H
CuZn hydroxyl double salts (CuZn–HDS) were prepared using the same synthesis method of LHZS by adding a copper source. When tested as adsorbents for methyl orange (MO) removal, CuZn–HDS exhibited better performance than layered hydroxyl zinc salt (LHZS). CuZn-1 had a surface area of 33.8 m2 g−1 and displayed a maximum adsorption capacity of 847 mg g−1 for MO, which made it a potentially attractive adsorbent in water purification. The adsorption process followed a pseudo-second-order kinetic model, and the adsorption isotherm has been satisfactorily fitted using the Langmuir model. The adsorption mechanism for MO on CuZn-1 was also investigated.
Co-reporter:Dong Wang, Jianbo Sun, Xuan Cao, Yihan Zhu, Qingxiao Wang, Guangchao Wang, Yu Han, Geyu Lu, Guangsheng Pang and Shouhua Feng
Journal of Materials Chemistry A 2013 - vol. 1(Issue 30) pp:NaN8657-8657
Publication Date(Web):2013/05/24
DOI:10.1039/C3TA11506B
The inner structure of W18O49 mesocrystals was observed by electron microscopy with the help of ultramicrotomy and focused ion beam techniques. The results showed that these mesocrystals contain irregular mesopores formed through partial fusion of self-assembled nanowires, and consequently have long-range structural ordering in one dimension and short-range ordering in the other two dimensions. The W18O49 mesocrystals exhibit superior performance in gas sensing applications, which is considered to be associated with the presence of more oxygen vacancy sites in the unique mesoporous structure.
![1H-Imidazole, 1,1'-[1H-pyrrole-2,5-diylbis(methylene)]bis-](http://img.cochemist.com/ccimg/454700/454677-73-7.png)
![1H-Imidazole, 1,1'-[1H-pyrrole-2,5-diylbis(methylene)]bis-](http://img.cochemist.com/ccimg/454700/454677-73-7_b.png)
