二氧化钛基光催化降解甲醛的研究进展

The Research Progress of the Photocatalytic Degradation of Formaldehyde by Titanium Dioxide

作为室内空气中普遍存在的污染物,甲醛对人体健康具有极大的潜在危害。二氧化钛(TiO_(2))作为一种很有前景的光催化剂,已有研究证明其具有光催化降解甲醛的效果。本文简要介绍了室内甲醛的危害;关于TiO_(2)光催化技术对甲醛降解的机理;针对TiO_(2)在降解甲醛过程中存在的缺陷,综述了几种应用较多的改性TiO_(2)的方法,包括掺杂、半导体复合、贵金属沉积、载体吸附等;最后,对本研究领域存在的一些问题作出了总结,并对其发展前景作了展望。

As a ubiquitous pollutant in indoor air,formaldehyde has great potential harm to human health.Titanium dioxide(TiO_(2)),as a promising photocatalyst,has been proved to have the effect of photocatalytic degradation of formaldehyde.This paper briefly introduces the harm of indoor formaldehyde;The degradation mechanism of formaldehyde by TiO_(2) photocatalysis technology;In view of the defects existing in the degradation of formaldehyde by TiO_(2),several methods of modification of TiO_(2),including doping,semiconductor composite,precious metal deposition,carrier adsorption and so on,were reviewed.Finally,some problems in this field are summarized,and the development prospect is prospected.