Heterogeneous activation of Oxone by substituted magnetites Fe3-xMxO4 (Cr, Mn, Co, Ni) for degradation of Acid Orange II at neutral pH

文献类型： 外文期刊

第一作者： Wei, Gaoling

作者： Wei, Gaoling;Liao, Yishan;Xie, Zhenyue;Li, Dingqiang;Liang, Xiaoliang;He, Zisen;Liu, Peng;Ji, Shichao;He, Hongping;He, Zisen;Liu, Peng;Zhang, Jing

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关键词： Substituted magnetite;Heterogeneous degradation;Oxone;EXAFS;Sulfate radicals

期刊名称：JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL （ 影响因子：5.008； 五年影响因子：4.332 ）

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收录情况： SCI

摘要： In this study, the effect of incorporation of transition metals (i.e., Co, Mn, Cr, and Ni) into the magnetite on the reactivity towards Oxone activation was investigated at neutral pH. The magnetite samples were characterized by XRD and EXAFS. Co, Cr, and Ni were in the valences of +2, +3, and +2, respectively, while Mn was in the valences of +2 and +3. These cations occupied the octahedral sites of magnetite, but the distribution of Mn and Ni on the octahedral sites of magnetite surface increased with an increase of substitution extent. The activity of magnetites in Oxone activation was investigated through Acid Orange II (AOII) degradation at an initial pH of 7.0 with or without phosphate-buffered solution. In neutral medium, the AOII degradation by Mn, Cr, and Ni substituting magnetites followed pseudo-first-order kinetics. The incorporation of Co, Mn, and Ni improved the catalytic activity of magnetite in the order Mn

分类号： O64`O643

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