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题名: Decolorization of methylene blue in layered manganese oxide suspension with H2O2
作者: Zhang, LiLli ; Nie, Yulun ; Hu, Chun ; Hu, Xuexiang
刊名: JOURNAL OF HAZARDOUS MATERIALS
出版日期: 2011-06-15
卷号: 190, 期号:*, 页码:780—785
中文摘要: Layered birnessite-type manganese oxides (Na-OL-1) were prepared via a redox reaction involving MnO4- and Mn2+ under markedly alkaline conditions. According to the XRD analysis, the resulting material exhibited a well-crystallized octahedral layer (OL) structure with several different phases, including beta-MnOOH, alpha-MnOOH and gamma-Mn3O4. The catalyst was highly effective for the decolorization and degradation of methylene blue (MB) in the presence of H2O2 at neutral pH. The tested MB was completely decolorized in Na-OL-1 suspension by the fraction dosing of H2O2 (556.5 mM at the beginning and then 183.8 mM at 40 min). Based on the studies of electron spin resonance and the effect of radical scavengers, the O-1(2) and O-2(center dot-) were the main reactive oxygen species (ROS) in the reaction. It was found that both oxygen and ROS were generated from the decomposition of H2O2 in Na-OL-1 suspension, wherein the decomposition pathways were proposed. The generation of H2O2 in Na-OL-1 suspension at air atmosphere indicated that the existence of multivalent manganese oxides greatly enhanced the interfacial electron transfer, leading to the high activity of Na-OL-1. (C) 2011 Published by Elsevier B.V.
部门归属: 环境水质学国家重点实验室
WOS记录号: WOS:000292427800100
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内容类型: 期刊论文
URI标识: http://ir.rcees.ac.cn/handle/311016/7042
Appears in Collections:环境水质学国家重点实验室_期刊论文

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Zhang, LiLli; Nie, Yulun; Hu, Chun; Hu, Xuexiang.Decolorization of methylene blue in layered manganese oxide suspension with H2O2,JOURNAL OF HAZARDOUS MATERIALS,2011,190(*):780—785
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