摘要
利用纳米TiO_2光催化剂处理印染废水是一种高效、低耗和环保的污水处理技术,但在实用过程中存在禁带宽度大,阶带空穴和导带电子易于复合,光催化剂固定化与光催化效率之间存在有矛盾等问题,限制了其被广泛的应用.文章综述了国内外在解决这三个问题上现有的研究进展和其他因素对该材料催化效率的影响,并提出了负载在活性材料上且经过多方面改性的TiO_2纳米纤维膜是该催化剂努力的方向之一.
The nano - TiO2 photocatalyst treatment for dyeing wastewater is a new efficient, low - consumption and environmentally friendly sewage treatment technology, but the problems, such as large band gap, easy recombination of the valence band hole and eonduction band electron as well as the contradiction between the nano - TiO2 photocatalyst immobilization and photocatalystic efficiency, limit its wide use. In this paper, the existing research advancement and tendency in striving to solve these problems at home and abroad are reviewed and influence of other factors on photocatalystic efficiency is analyzed. The TiO2 nano - fiber fihn modified by many ways and loaded on active materials is one of the striving directions.
出处
《嘉兴学院学报》
2010年第6期67-72,共6页
Journal of Jiaxing University
基金
嘉兴学院大学生研究训练(SRT)计划重点项目(851709002)
关键词
纳米TIO2光催化
禁带宽度
阶带空穴和导带电子
负载
研究现状
Nano TiO2 photoeatalysis
band gap
valence band hole and conduction band electron
load
research advancement
