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Hydrothermal growth of well-aligned TiO_2 nanorod arrays: Dependence of morphology upon hydrothermal reaction conditions

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Rare Metals 2010年第3期29卷 286-291页

作者： LI Yuxiang ZHANG Mei GUO Min WANG Xidong Department of Physical Chemistry University of Science and Technology Beijing Beijing 100083 China College of Engineering Peking University Beijing 100871 China

Well-aligned TiO2 nanorod arrays （TNAs） were prepared on pretreated quartz substrates via hydrothermal *** effect of the different preparation conditions on the growth morphologies of TNAs was systematically investigated by X-ray diffraction （XRD） and field-emission scanning electron microscopy （FE-SEM）.The photocatalytic properties were tested by photodegradation of a methyl blue *** is demonstrated that the hydrothermal reaction conditions,such as precursor concentration,hydrothermal reaction temperature,and hydrothermal reaction times,can greatly affect the growth of *** the preparation process,TNAs with 2 μm in length and 140-170 nm in diameter and well-aligned orientation have been successfully *** photocatalytic experiment results indicate that TNAs have much better photocatalytic activity than TiO2 nanoparticles.

关键词： titanium dioxide nanorod arrays hydrothermal method photocatalyst

Preparation and Electrocatalytic Activity of Tungsten Carbide nanorod arrays

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Journal of Materials Science & Technology 2007年第5期23卷 591-594页

作者： Huajun ZHENG Zhenhai GU dinhuan ZHONG Wei WANG Research Center of Nano. Sci. ＆ Tech. Zhejiang University of Technology Hangzhou 310032 China State Key Laboratory for Breeding Base of Green Chemistry Synthesis Tech. Hangzhou 310014 China

High density tungsten carbide nanorod arrays have been prepared by magnetron sputtering （MS） using the aluminum lattice membrane （ALM） as template. Electrocatalytic properties of nitromethane electroreduction on the tungsten carbide nanorod arrays electrode were investigated by electrochemical method, and their electrocatalytic activity is approached to that of the Pt foil electrode.

关键词： Tungsten carbide nanorod arrays Aluminum lattice membrane Magnetron sputtering Electrocatalytlc activity

Enhancement of mass transfer efficiency and photoelectrochemical activity for TiO_(2)nanorod arrays by decorating Ni^(3+)-states functional NiO water oxidation cocatalyst

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Chinese Chemical Letters 2021年第6期32卷 1993-1997页

作者： Ningchao Zheng Xi He Weiqing Guo Zhuofeng Hu School of Environmental Science and Engineering Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation TechnologySun Yat-sen UniversityGuangzhou 510006China School of Environmental and Chemical Engineering Foshan UniversityFoshan 528000China

Photoelectrochemical(PEC)water splitting is a promising technology to use solar ***,current metal oxides photoanode face the problem of sluggish water oxidation *** this study,we propose that the sluggish water oxidation process will cause slow mass transfer efficiency,which are rarely considered previously,especially at large bias and strong *** transfer refers to the migration of reactants(like H_(2)O and OH^(-))to the photoanode surface,reaction with holes and diffusion of products(like radical and O^(2))to the bulk of the *** the migration and diffusion are not fast enough,the mass transfer will inhibit the increase of PEC *** problem will be more apparent for nanorod arrays(NRAs),where the space among the NRAs is related ***,we solve this problem by decorating the surface of the photoanode by NiO clusters with Ni3+state as water oxidation *** work studies the PEC process from the viewpoint of mass transfer and firstly demonstrates that mass transfer in NRAs structure can be promoted by using Ni-based water oxidation cocatalyst.

关键词： TiO_(2) nanorod arrays NiO cluster Cocatalyst Mass transfer Photoelectrochemical performance

Core-shell TiO_(2)/ZnO nanorod array films on FTO:Two-step synthesis and improved ethanol sensing performance

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Journal of Materiomics 2023年第4期9卷 725-734页

作者： Xiangli An Bowen Zhang Chongyang Wang Zhiyong Zhao Saisai Zhang Hari Bala Zhanying Zhang School of Materials Science and Engineering Henan Polytechnic UniversityJiaozuo454000China Cultivating Base for Key Laboratory of Environment-friendly Inorganic Materials in University of Henan Province Henan Polytechnic UniversityJiaozuo454000China

In this work,highly regular TiO_(2)nanorod array films were synthesized in situ on FTO by a facile hydrothermal method,and then ZnO shell layers were grown on the surface of the nanorods to form a coreshell structure via an ion-layer adsorption-reaction *** to the TiO_(2)nanorods,the prepared TiO_(2)/ZnO nanocomposites exhibited enhanced ethanol sensing performances,including a low working temperature,higher sensitivity,and faster response *** optimum sensor based on 2c-TiO_(2)/ZnO exhibited the maximum response value of 30.85 toward 50×10^(-6)C_(2)H_(5)OH at 340℃,which was almost 4.15 times higher than that of the TiO_(2)*** improved ethanol sensing mechanism was discussed in relation to the unique nanorod array structure and the heterojunctions between TiO_(2)and ZnO.

关键词： Core-shell structure TiO_(2)/ZnO nanorod arrays Heterojunction Gas sensor