Facile synthesis of magnetic ZnFe^sub 2^O^sub 4^-reduced graphene oxide hybrid and its photo-Fenton-like behavior under visible iradiation

A magnetic ZnFe2O4-reduced graphene oxide (rGO) hybrid was successfully developed as a heterogeneous catalyst for photo-Fenton-like decolorization of various dyes using peroxymonosulfate (PMS) as an oxidant under visible light irradiation. Through an in situ chemical deposition and reduction, ZnFe2O...

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Published inEnvironmental science and pollution research international Vol. 21; no. 12; p. 7296
Main Authors Yao, Yunjin, Qin, Jiacheng, Cai, Yunmu, Wei, Fengyu, Lu, Fang, Wang, Shaobin
Format Journal Article
LanguageEnglish
Published Heidelberg Springer Nature B.V 01.06.2014
Subjects
Aqueous solutions
Carbon
Catalysts
Chemical engineering
Decolorization
Dyes
Graphene
Graphite
Irradiation
Laboratories
Light
Magnetism
Metals
Morphology
Nanoparticles
Nitrates
Oxidants
Oxidation
Oxidizing agents
Photocatalysis
Pollutants
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Summary:A magnetic ZnFe2O4-reduced graphene oxide (rGO) hybrid was successfully developed as a heterogeneous catalyst for photo-Fenton-like decolorization of various dyes using peroxymonosulfate (PMS) as an oxidant under visible light irradiation. Through an in situ chemical deposition and reduction, ZnFe2O4 nanoparticles (NPs) with an average size of 23.7 nm were anchored uniformly on rGO sheets to form a ZnFe2O4-rGO hybrid. The catalytic activities in oxidative decomposition of organic dyes were evaluated. The reaction kinetics, effect of ion species and strength, catalytic stability, degradation mechanism, as well as the roles of ZnFe2O4 and graphene were also studied. ZnFe2O4-rGO showed to be a promising photocatalyst with magnetism for the oxidative degradation of aqueous organic pollutants and simple separation. The combination of ZnFe2O4 NPs with graphene sheets leads to a much higher catalytic activity than pure ZnFe2O4. Graphene acted as not only a support and stabilizer for ZnFe2O4 to prevent them from aggregation, largely improving the charge separation in the hybrid material, but also a catalyst for activating PMS to produce sulfate radicals at the same time. The ZnFe2O4-rGO hybrid exhibited stable performance without losing activity after five successive runs.
ISSN:0944-1344
1614-7499
DOI:10.1007/s11356-014-2645-x