title: Efficient degradation of carbamazepine by easily recyclable microscaled CuFeO2 mediated heterogeneous activation of peroxymonosulfate.
abstract: Microscaled CuFeO2 particles (micro-CuFeO2) were rapidly prepared via a microwave-assisted hydrothermal method and characterized by scanning electron microscopy, X-ray powder diffraction and X-ray photoelectron spectroscopy. It was found that the micro-CuFeO2 was of pure phase and a rhombohedral structure with size in the range of 2.8±0.6μm. The micro-CuFeO2 efficiently catalyzed the activation of peroxymonosulfate (PMS) to generate sulfate radicals (SO4-), causing the fast degradation of carbamazepine (CBZ). The catalytic activity of micro-CuFeO2 was observed to be 6.9 and 25.3 times that of micro-Cu2O and micro-Fe2O3, respectively. The enhanced activity of micro-CuFeO2 for the activation of PMS was confirmed to be attributed to synergistic effect of surface bonded Cu(I) and Fe(III). Sulfate radical was the primary radical species responsible for the CBZ degradation. As a microscaled catalyst, micro-CuFeO2 can be easily recovered by gravity settlement and exhibited improved catalytic stability compared with micro-Cu2O during five successive degradation cycles. Oxidative degradation of CBZ by the couple of PMS/CuFeO2 was effective in the studied actual aqueous environmental systems.
authors.affiliation: Key Laboratory of Catalysis and Materials Science of the State Ethnic Affairs Commission and Ministry of Education, College of Resources and Environmental Science, South-Central University for Nationalities, Wuhan 430074, PR China. Electronic address: yaobinding@mail.scuec.edu.cn.
authors.forename: Yaobin
authors.initials: Y
authors.lastname: Ding
authors.affiliation: College of Pharmacy, South-Central University for Nationalities, Wuhan 430074, PR China.
authors.forename: Hebin
authors.initials: H
authors.lastname: Tang
authors.affiliation: Key Laboratory of Catalysis and Materials Science of the State Ethnic Affairs Commission and Ministry of Education, College of Resources and Environmental Science, South-Central University for Nationalities, Wuhan 430074, PR China.
authors.forename: Shenghua
authors.initials: S
authors.lastname: Zhang
authors.affiliation: Key Laboratory of Catalysis and Materials Science of the State Ethnic Affairs Commission and Ministry of Education, College of Resources and Environmental Science, South-Central University for Nationalities, Wuhan 430074, PR China.
authors.forename: Songbo
authors.initials: S
authors.lastname: Wang
authors.affiliation: Key Laboratory of Catalysis and Materials Science of the State Ethnic Affairs Commission and Ministry of Education, College of Resources and Environmental Science, South-Central University for Nationalities, Wuhan 430074, PR China. Electronic address: tangheqing@mail.scuec.edu.cn.
authors.forename: Heqing
authors.initials: H
authors.lastname: Tang
mesh_terms: D002220:Carbamazepine / Q000032:analysis*; D002384:Catalysis; D003300:Copper / Q000737:chemistry*; D005296:Ferrous Compounds / Q000737:chemistry*; D010316:Particle Size; D010545:Peroxides / Q000737:chemistry*; D059027:Recycling; D013499:Surface Properties; D014874:Water Pollutants, Chemical / Q000032:analysis*; D018508:Water Purification / Q000379:methods*
chemical_list: C523076:CuFe2O4; D005296:Ferrous Compounds; D010545:Peroxides; D014874:Water Pollutants, Chemical; C038288:peroxymonosulfate; D002220:Carbamazepine; D003300:Copper
keywords: Carbamazepine; CuFeO(2); Microscaled catalyst; Oxidative degradation; Peroxymonosulfate