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Role of graphene in MnO2/graphene composite for catalytic ozonation of gaseous toluene
Hu M.3; Hui K.S.1; Hui K.N.4
2014-10-15
Source PublicationChemical Engineering Journal
ISSN13858947
Volume254Pages:237-244
AbstractThe degradation of gaseous toluene is of great significance to protect human health. In this work, a facile and environmentally friendly route for synthesis of different MnO loadings (14.2-94.8wt.%) on graphene composites was developed through the direct redox reaction between graphene oxide and potassium permanganate at 160°C for 12h under hydrothermal condition. The elemental composition, crystal structure, and material properties of the MnO/graphene samples were characterized using ICP-AES, XRD, TEM, FTIR spectroscopy, Raman spectroscopy, N physisorption technique, and TG/DTA. The results show that the hydrothermal method is an effective way to prepare tightly anchored birnessite-type MnO on graphene. MnO nanoparticles were uniformly distributed throughout the surface of graphene nanosheets at 64.6wt.% MnO loading, whereas aggregation or erosion of graphene sheets occurred at low or high loading of MnO. The activities of graphene, MnO, and the MnO/graphene samples in catalytic ozonation of gaseous toluene were determined at 22°C. The amount of MnO loaded on graphene showed a significant influence on the BET surface area, and the catalytic activity of the MnO/graphene samples. The highest toluene degradation rate (7.89×10molming) over the 64.6wt.% MnO/graphene sample was attributed to the synergetic effect of graphene and MnO which was attributed to the tight connection between the active sites on graphene for adsorption of toluene and decomposition of ozone, and the MnO on graphene for decomposition of ozone to form atomic oxygen species. © 2014 Elsevier B.V.
KeywordCatalytic ozonation Hole Hydrothermal method Toluene degradation
DOI10.1016/j.cej.2014.05.099
URLView the original
Language英語
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Cited Times [WOS]:61   [WOS Record]     [Related Records in WOS]
Document TypeJournal article
CollectionUniversity of Macau
Affiliation1.Hanyang University
2.New Jersey Institute of Technology
3.City University of Hong Kong
4.Pusan National University
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Hu M.,Hui K.S.,Hui K.N.. Role of graphene in MnO2/graphene composite for catalytic ozonation of gaseous toluene[J]. Chemical Engineering Journal,2014,254:237-244.
APA Hu M.,Hui K.S.,&Hui K.N..(2014).Role of graphene in MnO2/graphene composite for catalytic ozonation of gaseous toluene.Chemical Engineering Journal,254,237-244.
MLA Hu M.,et al."Role of graphene in MnO2/graphene composite for catalytic ozonation of gaseous toluene".Chemical Engineering Journal 254(2014):237-244.
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