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Carbon Doping Triggered Efficient Electrochemical Hydrogen Evolution of Cross-Linked Porous Ru-MoO_(2) Via solid-phase reaction Strategy

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Energy & Environmental Materials 2023年第1期6卷 392-400页

作者： Jialin Cai Jianye Yang Xin Xie Jie Ding Leyan Liu Wanyu Tian Yushan Liu Zhiyong Tang Baozhong Liu Siyu Lu The Green Catalysis Center and College of ChemistryZhengzhou UniversityZhengzhou 450000China Henan Institute of Advanced Technology Zhengzhou UniversityZhengzhou 450000China National Center of Nanoscience and Technology Beijing 100190China College of Chemistry and Chemical Engineering Henan Polytechnic University2001 Century AvenueJiaozuo 454000China

The defect-free structure of Mo-based materials is a“double-edged sword”,which endows the material with excellent stability,but limits its chemical versatility and application in electrochemical hydrogen evolution reaction(HER).Carbon doping engineering is an attractive strategy to effectively improve the performance of Mo-based catalyst and maintain their ***,we report a cross-linked porous carbon-doped MoO_(2)(C–MoO_(2))-based catalyst Ru/C–MoO_(2) for electrochemical HER,which is prepared by the convenient redox solid-phase reaction(SPR)of porous RuO_(2)/Mo_(2)C composite *** studies reveal that due to the presence of carbon atoms,the electronic structure of C–MoO_(2) has been properly adjusted,and the loaded small Ru nanoparticles provide a fast water dissociation rate and moderate H adsorption *** electrochemical studies under a pH-universal environment,Ru/C–MoO_(2) electrocatalyst exhibits a low overpotential at a current density of 10 mA cm^(-2) and has a low Tafel ***,Ru/C-MoO_(2) has excellent stability for more than 100 h at an initial current density of 100 mA cm^(-2).

关键词： carbon doped hydrogen evolution reaction macro-meso-micropore MoO_(2) Ru solid-phase reaction

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Characterizations of Tb：Zn2SiO4 films on silicon wafer prepared by sol-geldip-coating and solid-phase reaction

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Chinese Physics B 2004年第4期13卷 561-563页

作者：季振国赵士超向因宋永梁叶志镇 StateKeyLaboratoryforSiliconMaterials ZhejiangUniversityHangzhou310027China

Terbium-doped Zn2SiO4 films were successfully prepared on Si wafers by a simple sol-gel dip-coating and solid-phase reaction method of ZnO and SiO2. X-ray diffraction (XRD) and UV–Vis absorption results revealed that films processed below 850 degrees C were ZnO in wurzite structure and films processed above 850 degrees C were Zn2SiO4 in wellimite structure. Photoluminescence measurements of the Tb-doped Zn2SiO4 films showed two strong emission bands at 490 and 545nm. The photoluminescence lifetime was 4.6ms.

关键词： zinc silicate sol-gel solid-phase reaction photoluminescence

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Preparation of (Ti, Sn)O_2 Nano-Composite Photocatalyst by Supercritical Fluid Dry Combination Technology

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Journal of Materials Science & Technology 2005年第2期21卷 191-195页

作者： Jingchang ZHANG, Qing LI and Weiliang CAO Institute of Modern Catalysis, The Key Laboratory of Science and Technology of Controllable Chemical reactions, Ministry of Education, Beijing University of Chemical Technology, Beijing 100029, China Lab. of Controllable Chem. reactions Inst. of Modern Catalysis Beijing Univ. of Chem. Technol. Beijing 100029 China

A series of TiO2-SnO2 nano-sized composite photo-catalysts containing Sn (9.3%-30.1%) were prepared from TiCI4 and SnCl4·5H2O by using sol-gel, supercritical fluid dry and solid-phase reaction (SCFD) combination technology. Characterizations with X-ray diffraction (XRD), transmission electron microscopy (TEM) and Fourier Transform Infrared Spectroscopy (FTIR) showed that, in addition to anatase type TiO2, a new active phase (Ti, Sn)O2 (with particle size of 2.0-4.3 nm) formed, and there were no SnO2 crystals observed in the range of the doping concentration studied. Photo-catalytic reaction of phenol was used as a model reaction to evaluate the catalytic activities of the obtained catalysts. Compared with pure TiO2 or Ti-Sn catalyst prepared with general sol-gel method, Ti-Sn nano-composite photo-catalyst thus obtained showed significant improvement in catalytic activity. The photo-catalytic degradation rate of phenol could reach as high as 93.5% after 7 h. The preparation conditions of the new phase (Ti, Sn)O2 were investigated and its catalytic mechanism was proposed. The photo-catalytic particles prepared using SCFD combination technology exhibited small particle size, large surface area and high activity.

关键词： Anatase TiO2 (Ti, Sn)O2 Photo-catalytic Supercritical fluid dry method solid-phase reaction

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Potassium Tantalate K6Ta10.8O30 with Tungsten Bronze Structure and Its Photocatalytic Property

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Chinese Journal of Chemistry 2017年第2期35卷 189-195页

作者： Junting Wang Chun Xiao Xiaoyong Wu Gaoke Zhang School of Resources and Environmental Engineering Wuhan University of Technology Wuhan 430070 China

With the tunable and flexible physicochemical properties, tantalate photocatalysts with tungsten bronze struc- ture are worth being studied. In this work, we successfully synthesized a novel potassium tantalate K6Talo.8030 with tungsten bronze structure using a facile solid-state reaction route. The effects of calcination time on the phase com- position, morphology and crystallinity of the obtained samples were studied by XRD and SEM analyses. In addition, the photocatalytic activity of the samples was evaluated by the degradation of ARG dye under UV light irradiation. The results indicated that the K6Talo.8030 showed high photocatalytic activity for degradation of ARG and the pho- tocatalytic degradation of ARG followed the first order kinetics. Furthermore, the possible photocatalytic mecha- nism of the K6TamsO30 photocatalyst was proposed based on tungsten bronze structure feature and the scavengers experimental results. This study would give a new insight into tantalate photocatalysts.

关键词： tantalum tungsten bronze structure K6Ta10.8O30 solid-phase reaction photocatalysis acid red G

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