纳米TiO_2改性及其光催化降解室内VOCs研究进展

Modification of TiO_2 nanomaterials and their application in photocatalytic degradation of VOCs in indoor air

作为室内空气中普遍存在的污染物,挥发性有机物(VOCs)对人体健康具有极大的潜在危害。绿色高效的光催化技术是降解VOCs的重要手段,但常规TiO_2催化剂存在光响应范围窄、量子效率低等缺点。因此,纳米TiO_2光催化剂的改性得到了广泛关注。目前的改性方法包括离子掺杂、贵金属沉积、半导体复合等。本文综述纳米TiO_2光催化剂的改性方法,分析了各方法提高光催化效率的原理及影响因素,总结了改性TiO_2纳米材料降解室内VOCs的研究进展。

The volatile organic compounds（VOCs） are one kind of ubiquitous pollutants in the indoor air,with great potential hazards on human health. The photocatalysis,which is green and highly efficient,is an important technology for the removal of VOCs. However,the conventional TiO2 has some shortcomings,such as the narrow light response range and the low quantum efficiency. So,the modification of TiO2 nanomaterials has been a wide concern. The modification methods for TiO2 nanomaterials include the ion doping,the noble metal deposition,and the semiconductor coupling. This paper reviews the modification methods for TiO2 nanomaterials,and analyzes the mechanism and the influencing factors for improving photocatalytic efficiency. The research progress for VOCs removal in indoor air with modified TiO2 nanomaterials is summarized. As a new application for photocatalytic materials,the photocatalytic degradation of VOCs in indoor air with modified TiO2 nanomaterials needs to be further studied.