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	Preparation and characterization of Fe3O4/gallic acid/graphene oxide magnetic nanocomposites as highly efficient Fenton catalysts
	Hua, Yani1,2; Wang, Sha1; Xiao, Juan3; Cui, Chang1,2; Wang, Chuan1
	2017
摘要	In this study, Fe3O4/gallic acid/graphene oxide magnetic nanocomposites (Fe3O4/GA/GO MNPs) were synthesized as heterogeneous Fenton catalysts to activate H2O2 to degrade methylene blue (MB). The catalysts were characterized by X-ray diffraction (XRD), zeta potential analysis, thermogravimetric analysis (TGA), transmission electron microscopy (TEM) and X-ray Photoelectron Spectroscopy (XPS). The addition of GA resulted in crystal defects on the surface of Fe3O4/GA/GO which improved its catalytic properties. Moreover, Fe3O4/GA/GO had larger surface area, correspondingly exposing more active sites for H2O2 activation, as well as enhancing the adsorption of MB which also promoted its catalytic properties. Complete removal of MB (0.2 mM) and remarkable mineralization of total organic carbon (TOC) (66.7%) were obtained within 420 min at pH 6.0 and 30 degrees C by using 1.0 g L (1) Fe3O4/GA/GO MNPs and 160.0 mM H2O2. Furthermore, MB could be completely degraded by Fe3O4/GA/GO MNPs in a wide pH value ranging from 3.0 to 10.0. The catalyst showed stable catalytic activity, as well as good mechanical stability, and could be recycled 10 times.
DOI	10.1039/c6ra23939k
URL	查看原文 ; 查看原文
发表期刊	RSC ADVANCES
ISSN	2046-2069
卷号	7期号:46页码:28979-28986
通讯作者	Wang, CA (reprint author), Chinese Acad Sci, Chongqing Inst Green & Intelligent Technol, Key Lab Reservoir Aquat Environm, Chongqing 400714, Peoples R China.
收录类别	SCI
WOS记录号	WOS:000403012700044
语种	英语