摘要
针对近年来TiO2光催化的研究和应用进展,对纳米TiO2的制备方法、光催化机理及其影响因素进行了综述,指出光源种类、光源强度、体系的反应温度、体系的pH值等是影响TiO2催化速率和效率的主要因素,在此基础上总结出提高纳米TiO2光催化活性方法,对掺杂半导体材料和表面改性两种主要方式进行了归纳,介绍了TiO2作为光催化剂在环境领域的应用及使用寿命,提出了TiO2作为光催化剂的发展趋势。
The preparation method,photocatalytic mechanism and influence factors of nano-titanium dioxide are introduced based on photocatalytic research and application. The main influence factor on catalytic rate and efficiency such as light source, light intensity, reaction temperature and PH value are pointed. Based on above, the methods of improving the photocatalytic activity of nano-TiO2 comprised of surface modification and doped semiconductor material are discussed. The application environment and life of TiO2 as a photocatalyst are introduced, and its trend of development are proposed.
基金
湖北省自然科学基金项目（2008CDB272）
湖北省教育厅重点项目（D200713005）
关键词
纳米二氧化钛
光催化
降解
活性
nano-titania
photocatalysis
degradation
activation
