【摘要】 分别采用Fe2 + 及TiO2 作为光催化剂 ,考察了它们对甲基橙的降解率。结果表明 :在芬顿反应体系中加入NaOH时 ,可有效地阻止反应的进行 ;pH =4时 ,光催化氧化率最高 ;甲基橙溶液浓度越低 ,光催化氧化效果越好 ;改进后的光催化剂对甲基橙的分解率明显提高 ,不会生成草酸的铁盐沉淀 ;H2 O2 +FeC2 O4 、H2 O2 +FeSO4 、TiO2三种体系的光催化性能大小依次为H2 O2 +FeC2 O4 >TiO2 >H2 OO2 +FeSO4 。更多还原

【Abstract】 By using Fe 2+ and TiO 2 as photocatalysts, th e degradations on methyl orange were investigated. The results demonstrated that the reaction was prevented effectively in the fenton reaction system when NaOH was added; the efficiency on photocatalytic oxidation was highest when pH=4 and better when the concentration of methyl orange was lower. The degradation of met hyl orange was promoted greatly when photocatalyst was modified and the depositi on of FeC 2O 4 disappeared. The photocatalytic activities of H 2O 2+FeSO 4 、H 2O 2+FeC 2O 4、TiO 2 were in turn H 2O 2+FeC 2O 4>Ti 2>H O 2> FeSO 4.更多还原