title: Preparation of immobilized Cu2O using microwave irradiation and its catalytic activity for bisphenol A: comparisons of Cu2O/H2O2 and visible-light/Cu2O/H2O2 systems.
abstract: This study produced immobilized Cu2O via microwave irradiation. The surface properties of Cu2O were assessed by X-ray diffraction, scanning electron microscopy, and UV-vis spectroscopy. The catalytic activity of the generated Cu2O was examined for bisphenol (BPA) degradation in Cu2O/H2O2 and visible-light/Cu2O/H2O2 systems under various H2O2 concentrations. Cu2O can decompose H2O2 to generate radicals, similar to the Fenton-like process. The BPA degradation rate followed pseudo-first-order kinetics. The optimal H2O2 concentration was 30 mM and the BPA degradation rate under 30 mM H2O2 in the Cu2O/H2O2 and visible-light/Cu2O/H2O2 systems was 1.43 and 2.69 h(-1), respectively. The original Cu2O partly oxidized into CuO in the visible-light/Cu2O/H2O2 system and the BPA degradation percentage declined to 51% from 100% after the fifth cycle.
authors.affiliation: Department of Environmental and Safety Engineering, National Yunlin University of Science and Technology, Taiwan.
authors.forename: C Y
authors.initials: CY
authors.lastname: Kuo
authors.affiliation: Department of Chemical and Materials Engineering, National Kaohsiung University of Applied Sciences, 415 Chien Kung Road, Kaohsiung 807, Taiwan E-mail: wuch@kuas.edu.tw.
authors.forename: C H
authors.initials: CH
authors.lastname: Wu
authors.affiliation: Department of Chemical and Materials Engineering, National Kaohsiung University of Applied Sciences, 415 Chien Kung Road, Kaohsiung 807, Taiwan E-mail: wuch@kuas.edu.tw.
authors.forename: J T
authors.initials: JT
authors.lastname: Wu
authors.affiliation: Department of Environmental and Safety Engineering, National Yunlin University of Science and Technology, Taiwan.
authors.forename: Y C
authors.initials: YC
authors.lastname: Chen
mesh_terms: D001559:Benzhydryl Compounds / Q000737:chemistry*; D003300:Copper / Q000737:chemistry / Q000528:radiation effects*; D006861:Hydrogen Peroxide / Q000737:chemistry*; D008027:Light; D008855:Microscopy, Electron, Scanning; D008872:Microwaves; D010636:Phenols / Q000737:chemistry*; D013056:Spectrophotometry, Ultraviolet; D014874:Water Pollutants, Chemical / Q000737:chemistry*; D018508:Water Purification / Q000379:methods; D014961:X-Ray Diffraction; D000098826:Bisphenol A Compounds
chemical_list: D001559:Benzhydryl Compounds; D003300:Copper; D006861:Hydrogen Peroxide; D010636:Phenols; D014874:Water Pollutants, Chemical; C006780:bisphenol A; D000098826:Bisphenol A Compounds; C000520:cuprous oxide