随着经济的迅猛发展，人们对生活质量要求的提高，室内环境发生了巨大的变化，大量建筑材料和装潢材料造成了室内空气的污染，同时这些材料中各种化学添加剂使用量也在不断增加，使得新装修房间内空气中挥发性气体浓度高于室外，甚至高于工业区。常见的室内污染物有甲醛、甲苯、氨等挥发性气体，固体颗粒物质以及微生物污染物等。医学科研人员指出，这些污染物对人体健康有着极大的威胁，尤其是挥发性气体（voc），长期吸人会对人体的呼吸系统、心血管系统及神经系统有严重的危害，因此解决室内环境问题就显得尤为重要。目前，室内空气的净化技术主要有吸附、过滤、等离子体、静电、离子、膜分离以及光触媒等，而纳米TiO2：光触媒技术是近年来兴起的一项新技术，它可以利用包括太阳光在内的各种途径的紫外光，在室温条件下将各种挥发性气体予以光解，将微生物灭活等，从根本上解决了室内污染物对人体的危害。由于该项技术具有能耗低、操作简单、反映条件温和等优点， With the rapid development of economy, the improvement of people's living standard, great changes have taken place in the indoor environment, a lot of building materials and decoration materials caused by indoor air pollution, and these materials in various chemical additives usage is also increasing, the volatile gas concentration in air of newly decorated rooms is higher than outdoor, even higher than industrial zone. Common indoor pollutants are formaldehyde, toluene, ammonia and other volatile gases, solid particles and microbial pollutants. Medical researchers pointed out that these pollutants have a serious threat to human health, especially the volatile gas (VOC), will be long-term inhalation of respiratory system, cardiovascular system and nervous system of the human body are harmful, so it is very important to solve the problem of indoor environment. At present, the indoor air purification technology mainly include adsorption, filtration, plasma, electrostatic, ion, membrane separation and photocatalyst, nano TiO2 photocatalyst technology is a new technology developed in recent years, it can be a variety of ways including sunlight, using ultraviolet light, will be the photolysis of various volatile gases at room temperature under the condition of microbial inactivation, fundamentally solve the hazards of indoor pollutants on human body. The technology has the advantages of low energy consumption, simple operation and mild reaction condition,