摘要
光催化技术是一种新兴的高效节能现代废水处理技术,目前还处于实验室研究阶段。本文综述了纳米TiO2光催化降解机理;并讨论了催化剂颗粒度、pH值、表面改性、载体、外加氧化剂对其光催化活性的影响;然后对纳米TiO2在降解有机废水和无机废水、自来水净化等方面的应用进行了评述;最后指出了目前纳米TiO2在应用领域中存在的不足,并展望了合成出对可见光有高响应率的光催化剂以及和传统污水处理技术相结合的发展前景。
Photocatalytic technology is a new modern wastewater treatment technology with high efficiency and energy saving, and is still researched in the laboratory. Photocatalytic degradation mechanism by using namometer TiO2 is introduced, and the photocatalytic activity effect on the catalyst particle degree, pH value, surface modification, carrier, plus oxidants are discussed. Then the application about degradation of organic wastewater, inorganic wastewater and tap water purification by using namometer TiO2 are elaborated. At last, the defect of application field on namometer TiO2 is pointed out, and the prospects of combination about a high response rate of catalyst and traditional sewage treatment are proposed.
关键词
光催化
二氧化钛
影响因素
废水处理
photocatalysis
titanium dioxide
influence factors
wastewater treatment
