TiO2的光助导电性、光助气敏性及光催化性能的关系研究

项目名称： TiO2的光助导电性、光助气敏性及光催化性能的关系研究

项目编号： No.21273037

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 数理科学和化学

项目作者： 戴文新

作者单位： 福州大学

项目金额： 80万元

中文摘要： 反应物本身对TiO2的光催化（氧化或还原）性能有着显著影响，揭示反应物的作用本质，对于构建高效光催化体系具有重要的理论和实际意义。项目从反应物吸附是多相催化过程的重要步骤这一传统热催化观点出发，基于TiO2的半导电和气敏特性，提出利用光激发下TiO2表面的导电性（光助导电性）及对反应物的气敏性（光助气敏性）表征反应物的吸附作用、以探讨反应物在TiO2光催化过程中作用行为的新思路。拟制备TiO2系列催化剂，表征TiO2的光助导电性及其对O2、H2和其他反应物的气敏性，评价TiO2在气固相体系中光催化氧化或还原不同反应物的性能，探寻TiO2的光助导电性、光助气敏性和光催化性能三者间关系，阐述TiO2的光助导电性对其吸附反应物及光催化行为的影响规律，进而从导电性角度揭示反应物在TiO2光催化反应过程中的作用本质，为TiO2光催化剂在不同氧化或还原体系的性能改进及应用提供理论依据和实现途径。

中文关键词： TiO2；反应物吸附；光助导电性；光助气敏性；光催化性能

英文摘要： As well known, the photocatalytic performance of TiO2 is usually somewhat dependent on the reactant itself. To explore the effects of reactants on the photocatalytic behavior of TiO2 has an real theoretical and practical significance for building a high effective photocatalytic system of TiO2. In this project, based on the important role of the chemisorption behavior of reactants during the process of a multiphase catalysis as well as the semiconductor property of TiO2, a new idea is offered to study the effects of reactants on the photocatalytic performances of TiO2, i.e., the UV-assisted conductivity and the UV-assisted gas sensing properties of TiO2 is proposed to correlate with the chemisorption behaviors and the corresponding reaction processes of reactants at the surface of TiO2 under UV irradiation. For this purpose, a series of TiO2 catalysts will be tested the conductivity and the gas sensing properties for H2, O2 and other reactants under UV irradiation, respectively, and also be performed the photocatalytic activities of oxidizing or reducing the reactants in different reaction systems. Based on the above testing results, the correlation among the UV-assisted conductivities, the UV-assisted gas sensing properties for reactants and the photocatalytic activities of TiO2 will be studied. It is expected t

英文关键词： TiO2；Chemisorption of reactant；UV-assisted conductivity；UV-assisted gas sensitivity；Photocatalytic performance