摘要
半导体非均相光催化技术在环境治理与净化方面越来越受到人们的重视。概述了半导体TiO2光催化去除废水中重金属离子的机理,从光催化还原角度综合分析了废水中4种主要重金属离子Cr(Ⅵ)、Hg(Ⅱ)、Pb(Ⅱ)、Ag(Ⅰ)的光催化去除特性及其影响因素,进一步加深了对TiO2光催化本质规律的认识,最后讨论了TiO2光催化技术存在的问题和今后的发展趋势。
More and more attention has been paid to environmental governance and purification by semiconductor heterogeneous photocatalysis. An overview is given on the mechanism of TiO2 photocatalytic removal of heavy metal ions. From the angle of photocatalytic reduction, the removing characteristics of photocatalysis of four primary heavy metal ions Cr ( Ⅵ ), Hg ( Ⅱ ) ,Pb ( Ⅱ ) ,Ag ( Ⅰ ), and their influencing factors are summarized and analyzed. Further understanding on the essential disciplinarian of TiO2 photocatalysis is obtained. At the end, the problems existing in TiO2 photocatalytic technique and the trend of its future development are discussed.
出处
《工业水处理》
CAS
CSCD
北大核心
2012年第7期9-14,共6页
Industrial Water Treatment
关键词
重金属离子
光催化还原
二氧化钛
废水
heavy metal ions
photocatalytic reduction
titanium dioxide
wastewater