碱性橙在二氧化硅表面的吸附行为及光降解动力学研究  

STUDY ON THE ADSORPTION BEHAVIOR AND PHOTOCATALYTIC DEGRADATION KINETICS OF BASIC CHRYSOIDIN ON TITANIUM DIOXIDE

作　　者：齐普荣[1] 张雪娇[1] 李海丰[1] 王光辉[1] 

机构地区：[1]东华理工大学土木与环境工程学院,江西抚州344000

出　　处：《精细石油化工》2007年第6期25-28,共4页Speciality Petrochemicals

基　　金：江西省自然基金资助项目(2007GZH0477);江西省教育厅科技计划资助项目(赣教技字[2006]212号)

摘　　要：以不同初始浓度的碱性橙溶液为对象,用分光光度法研究了碱性橙溶液在一定量TiO_2表面的吸附行为;并在自制反应器中以250 W金属卤化物灯(365 nm)为光源,以二氧化钛为催化剂,对碱性橙溶液的光催化降解动力学进行了研究。结果表明:不同初始浓度的碱性橙溶液在定量TiO_2表面遵循朗格缪尔吸附模式,最大吸附量为26.61 mg/g,吸附常数为8.95×10^(-3)L/mg;光催化降解碱性橙溶液为假一级反应,反应动力学规律符合Langmuir-Himshelwood方程,其反应速率常数为22.50 mg/(L·min)。The adsorption behavior and photocatalytic degradation kinetics of basic chrysoidin on TiO2 surface were studied. The results showed that the adsorption behavior of the basic chrysoidin in aqueous solutions on TiO2 surface followed the Langmuir adsorption law; the maximum adsorption capacity was 26.61 mg/g and the adsorption constant was 8.95 × 10^-3 L/mg. The photocatalytic degradation of the basic chrysoidin in aqueous solutions followed pseudo-first-order reaction; the kinetic results could be fitted with the Langmuir-Hinshelwood equation and the reaction rate constant was 22.50 mg/（L · min）.

关 键 词：吸附行为 光催化降解 碱性橙 二氧化硅 动力学 

分 类 号：TQ613.1[化学工程—精细化工]