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2D/2D nano-hybrids of gamma-MnO2 on reduced graphene oxide for catalytic ozonation and coupling peroxymonosulfate activation
Wang, YX; Xie, YB; Sun, HQ; Xiao, JD; Cao, HB; Wang, SB
2016
Source PublicationJOURNAL OF HAZARDOUS MATERIALS
ISSN0304-3894
Volume301Issue:JUNEPages:56
Abstract

Two-dimensional reduced graphene oxide (2D rGO) was employed as both a shape-directing medium and support to fabricate 2D gamma-MnO2/2D rGO nano-hybrids (MnO2/rGO) via a facile hydrothermal route. For the first time, the 2D/2D hybrid materials were used for catalytic ozonation of 4-nitrophenol. The catalytic efficiency of MnO2/rGO was much higher than either MnO2 or rGO only, and rGO was suggested to play the role for promoting electron transfers. Quenching tests using tert-butanol, p-benzoquinone, and sodium azide suggested that the major radicals responsible for 4-nitrophenol degradation and mineralization are O-2(-) and O-1(2), but not (OH)-O-center dot. Reusability tests demonstrated a high stability of the materials in catalytic ozonation with minor Mn leaching below 0.5 ppm. Degradation mechanism, reaction kinetics, reusability and a synergistic effect between catalytic ozonation and coupling peroxymonosulfate (PMS) activation were also discussed. (C) 2015 Elsevier B.V. All rights reserved.

KeywordGraphene Nitrogen-doped Graphene Gamma-mno2 Phenol Degradation 4-nitrophenol Heterogeneous Activation Catalytic Ozonation Aqueous-solutions Peroxymonosulfate Carbon Nanotubes Manganese Oxides Facile Synthesis Water-treatment Oxalic-acid Oxidation
SubtypeArticle
DOI10.1016/j.jhazmat2015.08.031
URL查看原文
Indexed BySCI
Language英语
WOS IDWOS:000367407200007
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/20650
Collection研究所(批量导入)
Corresponding AuthorXie, YB
Recommended Citation
GB/T 7714
Wang, YX,Xie, YB,Sun, HQ,et al. 2D/2D nano-hybrids of gamma-MnO2 on reduced graphene oxide for catalytic ozonation and coupling peroxymonosulfate activation[J]. JOURNAL OF HAZARDOUS MATERIALS,2016,301(JUNE):56.
APA Wang, YX,Xie, YB,Sun, HQ,Xiao, JD,Cao, HB,&Wang, SB.(2016).2D/2D nano-hybrids of gamma-MnO2 on reduced graphene oxide for catalytic ozonation and coupling peroxymonosulfate activation.JOURNAL OF HAZARDOUS MATERIALS,301(JUNE),56.
MLA Wang, YX,et al."2D/2D nano-hybrids of gamma-MnO2 on reduced graphene oxide for catalytic ozonation and coupling peroxymonosulfate activation".JOURNAL OF HAZARDOUS MATERIALS 301.JUNE(2016):56.
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