氯仿在TiO2悬浮液中的光催化降解

在太阳光照射下氯仿在悬浮TiO3水溶液中能有效地被催化降解，晴天光照2h氯仿（10mg/L)光解率可达到85％左右，氯仿降解初始速率与浓度之间的关系符合Langmiur-Hinshelwood非均相催化动力学方程，在PH－5弱碱性介质或PH8－10弱酸性介质中的氯仿光催化效果较好，溶液中共存的无机阴离子对氯仿光催化有不同程度的影响，NO3对氯仿的光催人降解影响很小，Cl-,HCO-3则对氯仿的光催化降解表现出很强的抑制效应。

Solar Photocatalytic Degradation of Chloroform in Aqueous TiO2 Suspension

The photocatalytic of chloroform in TiO2 suspension with solar irradiating was very effective. The photodegradation ratio of chloroform was about 85% after 2h irradiating in sunny day. The dependence of the initial rate ofphotolysis on concentration of chlorform obeys Langmuir-Hin- shelwood kinetic equation of heterogeneous catalysis. The effect of chloroform photolysis is well at pH 4 ~ 5 or pH 8 ~ 10. The coexistent inoganic canons have influence on photolysis of chloroform in varying degrees. NO3- has a little effect but the C1- and HCO3- strongly inhibit photodegradation of chloroform.