芬顿反应与TiO_2光催化氧化甲基橙的研究  

Research of photocatalytic oxidation for fenton reaction and TiO_2 on Methyl Orange

作　　者：吴光辉[1] 杨莉[1] 吴少林[1] 

机构地区：[1]南昌航空工业学院环境与化学工程系,330034

出　　处：《南昌航空工业学院学报》2004年第3期65-68,共4页Journal of Nanchang Institute of Aeronautical Technology（Natural Science Edition）

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 。By using Fe^2 ＋ and TiO2 as photocatalysts, the 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 methyl orange was promoted greatly when photocatalyst was modified and the deposition of FeC2O4 disappeared. The photocatalytic activities of H2O2 ＋ FeSO4 ,H2O2 ＋ FeC2O4 ,TiO2 were in turn H2O2 ＋ FeC2O4 〉 Ti2 〉 HO2 〉 FeSO4.

关 键 词：芬顿反应 光催化氧化 甲基橙 

分 类 号：TQ314.242[化学工程—高聚物工业]