TiO_2光催化降解废水中多环芳烃的研究进展

Progress in TiO_2 Photocatalytic Degradation of PAHs in Wastewater

多环芳烃是一类对人身和环境安全有着巨大危害的有机污染物。光催化氧化技术可以在相对温和的反应条件下实现多环芳烃的无害化处理。高效的光催化过程是制约该技术发展的关键。本文主要介绍了TiO_2基光催化剂的催化机理,并根据不同的增强光催化效率的途径,介绍了TiO_2光催化降解水中多环芳烃的研究进展。

Polycyclic aromatic hydrocarbons are a class of persistent organic pollutants that are ubiquitous in the environmental. Polycyclic aromatic hydrocarbons could harmlessly be treated by photocatalytic oxidation technology under relatively mild reaction conditions. Photo-catalytic efficiency is a key factor of controlling the advance of photocatalytic oxidation technology. In this paper, the photocatalytic mechanism of titanium dioxide and the methods of enhanced photocatalytic efficiency were reviewed, and the problem that the modified titanium oxide composites are currently used in wastewater treatment needs further study.