活性炭纤维负载TiO2光催化降解甲醛的影响因素

利用自制光催化气体反应器体系，以活性炭纤维负载TiO₂作催化剂，在紫外光照射下模拟降解室内污染气体甲醛，测试了活性炭纤维负载TiO₂催化剂的催化活性，探讨了紫外光光强、催化剂的酸度、反应器内湿度及反应时间等控制反应的主要因素对甲醛降解率的影响。结果表明，活性炭纤维与TiO₂的协同作用大大提高了对甲醛的降解效果；紫外光强增倍对甲醛降解率有一定提高，但提高幅度仅为11.71%；活性炭纤维用pH=5的TiO₂溶胶浸泡做催化剂对甲醛的降解效果最好，60 min内降解率达到68.37％；反应器内的湿度为81%甲醛降解率最高，反应60 min后达82.2%；随着反应时间的延长，甲醛降解率的上升幅度不断减小,最高只能达到94.59%。

Study on the factors influencing photocatalytic degradation of formaldehyde by TiO2 loaded on activated carbon fiber

A photocatalytic gas reactor system was manufactured by which the photocatalytic degradation of stimulant indoor formaldehyde gas by TiO₂ supported on activated carbon fiber under UV light was studied, the catalytic activity of TiO₂ loaded on activated carbon fiber was tested, and the main controlling factors which a effected the degradation rate of formaldehyde such as the intensity of UV light, the acidity of catalyst, the humidity in reactor and the reactive time were discussed. The results showed that: the degradation rate of formaldehyde was promoted greatly because of the synergies of TiO₂and activated carbon fiber. The degradation rate of formaldehyde was increased only 11.71% by doubled the intensity of UV light. The degradation rate of formaldehyde could get 68.37% in 60 minutes when activated carbon fiber was soaked by TiO₂ sol in pH=5. The formaldehyde gas could reach the maximum degradation rate that 82.2% in 60 minutes when the humidity was 81%. The change of formaldehyde degradation rate was declining with the extending of time and the high point only could reach 94.59%.