分子识别作用下光催化降解偶氮染料酸性红B  

Photocatalytic degradation of azo dye Acid Red B based on molecular recognition

作　　者：齐普荣[1] 王光辉[1] 甄利军[1] 于荣[1] 邓南圣[2] 

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 [2]武汉大学资源与环境学院,湖北武汉430079

出　　处：《化学工程》2007年第12期59-61,74,共4页Chemical Engineering(China)

基　　金：江西省自然科学基金资助项目(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250 W金属卤化物灯(λ365 nm)为光源,二氧化钛为催化剂,研究了经分子识别作用后的酸性红B光催化降解行为,考察了影响光催化降解的条件因素。研究结果表明:对于20 mg/L的酸性红B,经β-环糊精分子识别后酸性红B的光催化降解效率可以提高24%;β-环糊精浓度、pH值和TiO2剂量对酸性红B的光催化降解速率有明显的影响。分子识别作用下酸性红B光催化降解的增强效应主要源于β-环糊精能有效促进酸性红B在TiO2表面的吸附。：TiO2 photocatalytic degradation behavior of Acid Red B （ARB） based on molecular recognition was studied under a 250 W metal halide lamp （A ≥ 365 nm）. Various conditions affecting photocatalytic degradation were also investigated. The results show that β-CD could increase the photodegradation efficiency by about 24% for 20 mg/L ARB because of molecular recognition interaction. The β-CD concentration, pH value and amount of TiO2 have obviously effects on the photocatalytic degradation rate of ARB. The enhancement of photocatalytic degradation of ARB based on molecular recognition results from the enhancement of adsorption of ARB on TiO2 surface.

关 键 词：分子识别 酸性红B 光催化降解 Β-环糊精 

分 类 号：X703[环境科学与工程—环境工程]