Hierarchically nanostructured porous TiO_2(B) with superior photocatalytic CO_2 reduction activity

查看全文 作　　者：Tingmin [1]Di;Jinfeng [1]Zhang;Bei [1]Cheng;Jiaguo [1,2]Yu;Jingsan [3]Xu

机构地区：[1]State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology;[2]Department of Physics, Faculty of Science, King Abdulaziz University;[3]School of Chemistry, Physics and Mechanical Engineering, Queensland University of Technology

出　　处：《Science China Chemistry》索引2018年第61卷第3期,共7页

基　　金：supported by the National Basic Research Program of China(2013CB632402);the National Natural Science Foundation of China(51320105001,21433007,51372190,21573170);the Natural Science Foundation of Hubei Province(2015CFA001);the Fundamental Research Funds for the Central Universities(WUT:2015-III-034);Innovative Research Funds of SKLWUT(2017-ZD-4);the Discovery Early Career Researcher Award(DECRA)by Australian Research Council(DE160101488) 摘　　要：Hierarchically nanostructured, porous TiO_2(B) microspheres were synthesized by a microwave-assisted solvothermal method combined with subsequent heat treatment in air. The materials were carefully characterized by scanning and transmission electron microscopy, X-ray diffraction, CO_2 adsorption, and a range of spectroscopies, including Raman, infrared, X-ray photoelectron and UV-Vis spectroscopy. The hierarchical TiO_2(B) particles are constructed by ultrathin nanosheets and possess large specific surface area, which provided many active sites for CO_2 adsorption as well as CO_2 conversion. The TiO_2(B)nanostructures exhibited marked photocatalytic activity for CO_2 reduction to methane and methanol. Anatase TiO_2 and P25 were used as the reference photocatalysts. Transient photocurrent measurement also proved the higher photoactivity of TiO_2(B) than that of anatase TiO_2. In-situ infrared spectrum was measured to identify the intermediates and deduce the conversion process of CO_2 under illumination over TiO_2(B) photocatalyst. 关键词：TiO2 多孔 CO2 光电流测量光催化剂光谱学变换过程红外线

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Hierarchically nanostructured porous TiO_2(B) with superior photocatalytic CO_2 reduction activity

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