功能化有序介孔氮化碳材料的制备及其可见光光催化性能研究

项目名称： 功能化有序介孔氮化碳材料的制备及其可见光光催化性能研究

项目编号： No.21201174

项目类型： 青年科学基金项目

立项/批准年度： 2013

项目学科： 无机化学

项目作者： 陈秀芳

作者单位： 中国科学院青岛生物能源与过程研究所

项目金额： 25万元

中文摘要： 多相光催化以其反应条件温和、可直接利用太阳光、反应路径短等独特性能而成为一种理想的绿色化学技术，在有机合成领域具有巨大的应用前景。针对光催化过程量子效率低而难以大规模应用的重大问题，本项目拟以环境友好的石墨相氮化碳为基体，通过引入有序介孔结构和对其进行表面贵金属改性修饰，从优化体相织构和表面功能改性两方面提高光催化效率，构建新型高效的可见光光催化剂，并应用于醇类光催化氧化合成羰基化合物；系统考察新型功能化催化剂的光催化性能；详细表征催化剂的组成、结构、光吸收特性、活性中心的空间结构与电子构型、有机物分子在催化剂表面的吸附行为和化学状态；研究孔结构和贵金属颗粒对光生电子-空穴对的分离及界面迁移、催化剂表面羟基自由基等活性氧物种的形成等影响，阐明孔结构和表面功能化促进光催化氧化过程的微观本质。本研究对开发新型可见光光催化剂、促进光催化技术在化学合成领域的规模化应用具有重大的理论和实际意义。

中文关键词： 光催化；石墨相氮化碳；表面功能化；催化；氧化

英文摘要： Heterogeneous photocatalysis is an ideal green chemical technology for its unique properties, such as mild reacion condition, direct use of sunlight, short reation path, which show great application prospect in organic synthesis. However, large-scale applications remain limited by the low quantum efficiency in the photocatalytic process. In this project, a novel and effective functional visible-light photocatalyst would be designed by introduction of ordered mesoporous structure and loading noble metal into/onto graphitic carbon nitride catalysts, and be applied in photocatalytic conversion of alcohol to carbonyl compounds. The photocatalytic performance of the novel funtional photocatalysts would be investigated systematically.The composition, structure, optical absorption properties, the spatial structure and electron configuration of active centers, the adsorption behavior and chemical state of organic molecules on the surface of catalysts would be detailedly characterized. The effect of pore structure and noble metal particles on the seperation of electron-hole pair and interface migration, the formation of reactive oxygen species such as hydroxyl radicals on the catalyst surface would be fully studied, and the microscopic nature of pore structure and surface functions to promote process of photocatalytic o

英文关键词： Photocatalysis；Graphitic Carbon Nitride；Surface Functionalization；Catalysis；Oxidation