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Decolorization of methylene blue in layered manganese oxide suspension with H2O2
Zhang, LiLli; Nie, Yulun; Hu, Chun; Hu, Xuexiang
2011-06-15
Source PublicationJOURNAL OF HAZARDOUS MATERIALS
Volume190Issue:*Pages:780—785
AbstractLayered 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.
Department环境水质学国家重点实验室
WOS IDWOS:000292427800100
Citation statistics
Cited Times:68[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.rcees.ac.cn/handle/311016/7042
Collection环境水质学国家重点实验室
Recommended Citation
GB/T 7714
Zhang, LiLli,Nie, Yulun,Hu, Chun,et al. Decolorization of methylene blue in layered manganese oxide suspension with H2O2[J]. JOURNAL OF HAZARDOUS MATERIALS,2011,190(*):780—785.
APA Zhang, LiLli,Nie, Yulun,Hu, Chun,&Hu, Xuexiang.(2011).Decolorization of methylene blue in layered manganese oxide suspension with H2O2.JOURNAL OF HAZARDOUS MATERIALS,190(*),780—785.
MLA Zhang, LiLli,et al."Decolorization of methylene blue in layered manganese oxide suspension with H2O2".JOURNAL OF HAZARDOUS MATERIALS 190.*(2011):780—785.
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