活性炭负载TiO_2光催化降解甲醛  

Photocatalytic Degradation of Formaldehyde with TiO_2/AC

作　　者：孙和芳[1] 张国栋[1] 郑光宇[1] 

机构地区：[1]安徽工业大学化学与化工学院,安徽马鞍山243002

出　　处：《安徽工业大学学报（自然科学版）》2007年第1期39-42,共4页Journal of Anhui University of Technology（Natural Science）

摘　　要：研究了活性炭负载TiO2所制得的光催化剂(TiO2/AC)对空气中甲醛光催化降解效果,考察了光照时间、TiO2负载量、空气流量对甲醛光催化降解效率的影响,讨论了TiO2/AC对甲醛的吸附性能以及吸附一定量甲醛后对其光催化效果的影响。结果表明:在活性炭表面负载TiO2后,对甲醛仍具有很强的吸附能力;光催化剂在空气中对甲醛的光催化降解效率可达94.06%;吸附甲醛后,稳定状态下甲醛光催化降解效率和新制备催化剂基本相同;在保证每次镀膜(TiO2)厚度达到300 nm的条件下,一次镀膜光催化效率高于多次镀膜;随着空气流量的增加,甲醛光催化降解效率有所提高。Photo catalysis was studied under a non-circulating system. The effects of light time, film thickness, flux of formaldehyde and the amounts of formaldehyde absorb on the TiO2/AC photo catalyst was investigated. Under balanced conditions, the maximum photo catalytic efficiency was up to 94.06%. The photo catalytic efficiency was decreased with the coating every times of the film thickness of 300 nm .The flux of air only had small effect on the photo catalysis of formaldehyde.

关 键 词：二氧化钛 光催化 甲醛 降解 

分 类 号：TQ153[化学工程—电化学工业]