环境领域的二氧化钛基光催化剂负载和改性技术研究进展

摘要

As the ever increasing environmental problems,TiO2 based photocatalyst becomes a hot spot,due to its various excellent properties. TiO2 based photocatalyst researches include the energy-based photolysis of water splitting,solar cells,water pollutants removal,and utilization of CO2 and so on. The research progress of loading and modification of TiO2 at home and abroad in recent years is reviewed. The use of silicates,polymers,glass and carbon materials and other carriers to load titanium dioxide,can effectively avoid the problems of easy loss,difficult to recycle and easy agglomeration. The modification of titanium dioxide by nonmetallic doping , precious metal deposition,transition metal ion doping,dye sensitization and semiconductor material composites can effectively reduce the band gap of titanium dioxide semiconductor materials as well as the compound probability of electron and hole,and enhance the visible light activity of the TiO2 based catalyst. And the future applications of TiO2 based photocatalyst in sewage treatment and atmospheric organic pollutants treatment are also prospected.%在环境问题日益加剧的今天,二氧化钛基光催化剂因其具有优异的性质,是光催化领域中人们研究的热点.二氧化钛基光催化剂研究包括能源领域的光解水制氢、太阳能电池、水体内污染物的去除以及CO2资源化利用等方面.本文综述了近年来国内外二氧化钛的负载和改性技术的研究进展.通过硅土类、聚合物类、玻璃类和碳材料等载体来负载二氧化钛,可有效解决其易流失、难回收和容易团聚的问题;以非金属掺杂、贵金属沉积、过渡金属离子掺杂、染料敏化和半导体材料复合等对二氧化钛进行改性研究,可有效减小二氧化钛半导体材料禁带宽度,能够有效降低电子和空穴复合的概率,增强二氧化钛基催化剂的可见光活性.并对未来的二氧化钛基光催化剂在环境中污水处理及大气有机污染物治理应用研究方面进行了展望.