可见光照射下α-FeOOH光催化降解有机污染物的研究  

PHOTOCATALYTIC DEGRADATION OF ORGANIC POLLUTANTS BY α-FeOOH UNDER VISIBLE LIGHT

作　　者：姜利荣[1] 赵超[1] 黄应平[2] 李瑞萍[2] 

机构地区：[1]华中师范大学化学学院,武汉430079 [2]三峡大学生态与环境科学研究中心,宜昌443002

出　　处：《环境化学》2007年第4期434-438,共5页Environmental Chemistry

基　　金：国家自然科学基金(50639070;20373074);湖北省教育厅自然科学重大项目(2004Z001)

摘　　要：以α-FeOOH为光催化剂,酸性桃红(SRB)为目标化合物,研究了可见光照射下光催化剂对SRB的降解,结果表明:在可见光(λ>420nm)照射下,SRB浓度为1·2×10-5mol·l-1,H2O2浓度为1·5×10-3mol·l-1,α-FeOOH为0·16g·l-1,pH=7·05时,SRB的降解效果最好,红外光谱分析表明,SRB降解产物为羧酸及胺类化合物.另外,采用苯甲酸荧光分析法间接测定体系中自由基的含量,表明此光催化降解过程主要涉及·OH历程.The photocatalytic degradation of sulforhodmine B （SRB） was investigated by goethite （α-FeOOH） under visible light. The results showed that the optimum operation parameters of degradation of SRB as follows： at neutral pH, SRB was 1.2 ×10^-5 mol·l^-1, H202was 1.5×10^-3 mol·l^-1, goethite was 0. 16g·l^-1 respectively under visible light. The final mineralized products were carboxyl acids and amine compounds identified by infrared spectrophotometry. ·OH radical concentration was indirectly determined by benzoic acid in fluorescence analysis method, which illustrated α-FeOOH photocatalytic degradation irradiated by visible light mainly involved ·OH radical mechanism.

关 键 词：酸性桃红 Α-FEOOH 光催化 

分 类 号：X132[环境科学与工程—环境科学]