臭氧光催化转化的基础研究

项目名称： 臭氧光催化转化的基础研究

项目编号： No.21466035

项目类型： 地区科学基金项目

立项/批准年度： 2015

项目学科： 有机化学

项目作者： 谭欣

作者单位： 西藏大学

项目金额： 55万元

中文摘要： 具有极强氧化性的臭氧（O3）给人类生活带来日益负面影响，尤其在西藏高海拔地区室内环境、活动频繁的车厢，以及高空飞行的客机坐舱等封闭环境中，随海拔浓度增高的O3难以实现自降解而给人们的健康构成持续威胁和影响，因此高效便捷地去除空气中O3在西藏意义重大。本项目研究制备一系列新型贵金属改性(001)TiO2/Gn复合光催化剂，利用气相光催化反应器，实现封闭环境空气中O3安全快速降解。采用改性Hummer法和水热法分步制备贵金属改性(001)TiO2/Gn复合光催化剂；通过XRD、TEM、XPS、IR、DRS、UV、NMR表征方法对贵金属改性(001)TiO2/Gn复合材料进行表征和分析，研究三者协调作用机理。在光催化反应器中采用复合光催化剂降解处理O3，测定降解效率，研究Gn用量、TiO2（001）晶面、贵金属类型等对光催化效率的影响规律，实现光催化降解臭氧反应机理和动力学的基础研究。

中文关键词： 二氧化钛；高能晶面；臭氧；水热法

英文摘要： The negative influence of ozone (O3) is increasingly prominent, due to its strong oxidizing property. The environment pollutions caused by O3 threats seriously to people's life safety and health. Especially, in closed environment where most of people appear frequently, such as subway cars, aircraft cabins, and so on, which is difficult to rapid degradation. Therefore, how to remove O3 efficiently and conveniently becomes an important research subject. In order to realize that the degradation of O3rapidly and effectively, a series of new type of precious metal modification (001) TiO2/Gn composite photocatalysts will be prepared and be applied to the treatment of high concentration of O3 in closed environment. The main research contents: Preparation of precious metal modification (001) TiO2/Gn composite photocatalysts step by step via modified Hummer method, hydrothermal method and chemical reduction method, respectively. XRD, SEM, TEM, XPS, IR, DRS, UV, and NMR are used to characterize analyze the composite materials comprehensively. The coordination mechanism among precious metal, (001) TiO2 and Gn will be investigated in detail. Design and build photocatalytic reactor, investigate the photocatalyst degradation of O3 by the composite photocatalysts. The efficiency of photocatalytic degradation will be tested. The effects of Gn dosage, the crystal plane (001) of TiO2, and precious metals type on the efficiency of photocatalyst degradation of O3 were also studied. The reaction mechanism of photocatalyst degradation of O3 by the precious metal modification (001) TiO2/Gn will be analyzed.

英文关键词： TiO2;high-energy;hydrothermal;method