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中文摘要：
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（A〉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。
英文摘要：
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.
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