title: Facile synthesis of magnetic ZnFe2O4-reduced graphene oxide hybrid and its photo-Fenton-like behavior under visible iradiation.
abstract: 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.
authors.affiliation: Anhui Key Laboratory of Controllable Chemical Reaction and Material Chemical Engineering, School of Chemical Engineering, Hefei University of Technology, Tunxi Road 193, Hefei, 230009, China, yaoyunjin@gmail.com.
authors.forename: Yunjin
authors.initials: Y
authors.lastname: Yao
authors.forename: Jiacheng
authors.initials: J
authors.lastname: Qin
authors.forename: Yunmu
authors.initials: Y
authors.lastname: Cai
authors.forename: Fengyu
authors.initials: F
authors.lastname: Wei
authors.forename: Fang
authors.initials: F
authors.lastname: Lu
authors.forename: Shaobin
authors.initials: S
authors.lastname: Wang
mesh_terms: D002384:Catalysis; D004396:Coloring Agents / Q000737:chemistry*; D005296:Ferrous Compounds / Q000737:chemistry*; D006108:Graphite / Q000138:chemical synthesis*; D060328:Magnetic Phenomena; D053768:Metal Nanoparticles / Q000737:chemistry; D009930:Organic Chemicals / Q000737:chemistry*; D010084:Oxidation-Reduction; D010545:Peroxides; D014865:Waste Disposal, Fluid / Q000379:methods*; D014874:Water Pollutants, Chemical / Q000737:chemistry*; D018508:Water Purification; D017967:Zinc Compounds / Q000737:chemistry; D015034:Zinc Oxide / Q000737:chemistry*
chemical_list: D004396:Coloring Agents; D005296:Ferrous Compounds; D009930:Organic Chemicals; D010545:Peroxides; D014874:Water Pollutants, Chemical; D017967:Zinc Compounds; C038288:peroxymonosulfate; D006108:Graphite; C034236:ferrous oxide; D015034:Zinc Oxide