甲基橙溶液多相光催化降解研究

Photocatalytic Degradation of Methyl Orange in TiO_2 Suspension

利用中压汞灯作为光源，在ＴｉＯ２粉末悬浆体系内，以甲基橙溶液光降解脱色速率为例，探讨间歇式电光源圆柱形光化学反应器的运行情况及影响因素．分别考察了使用３００Ｗ和５００Ｗ中压汞灯、石英和玻璃冷阱、甲基橙溶液温度在２０℃或５０℃、不同ＴｉＯ２催化剂以及不同催化剂投加量对甲基橙溶液脱色速率的影响．从而得出在现有电光源圆柱形反应器的最佳运行条件下，２０ｍｇ／Ｌ的甲基橙溶液光照１０ｍｉｎ，脱色率达９７．４％．

The photocatalytic decolorization of methyl orange in TiO_2 suspension irradiated by middle pressure mercury lamp was investigated with the typical bench annular photoreactor.The effects of different power of lamp,quartz and glass cooling wall,solution temperature,different types of TiO2 catalyst and catalyst amount on the decolorization of methyl orange were investigated in detail.The results showed that 500 W Hg lamp,quartz cooling wall,Dugess P25 TiO2,10mg/L catalyst amount are the best operating conditions in the experiment.When the initial concentration of methyl orange was 20mg/L,after 10 min the solution colore removal achieved 974%.