title: Photocatalytic performance of Cu2O-loaded TiO2/rGO nanoheterojunctions obtained by UV reduction.
abstract: A novel dot-like Cu2O-loaded TiO2/reduced graphene oxide (rGO) nanoheterojunction was synthesized via UV light reduction for the first time. Cu2O with size of ca. 5 nm was deposited on rGO sheet and TiO2nanosheets. The products were characterized by infrared spectroscopy, Raman spectrum, UV-Vis diffuse reflectance spectra, XPS techniques, photoluminescence spectra. The results demonstrated that Cu2O and rGO enhanced the absorption for solar light, separation efficiency of electron-hole pairs, charge shuttle and transfer, and eventually improved photoelectrochemical and photocatalytic performance for contaminants degradation. The reaction time and anion precursor could affect the final copper-containing phase. As extending UV irradiation time, Cu2+was be first reduced to Cu2O and then transformed to metal Cu. In comparison with CH3COO-(copper acetate), NO3-(copper nitrate) and Cl-(copper chloride), SO42-(copper sulfate) was the optimum for synthesizing pure Cu2O phase.
authors.affiliation: College of Science, China University of Petroleum, Qingdao, 266580 China.
authors.forename: Kaituo
authors.initials: K
authors.lastname: Dong
authors.affiliation: College of Science, China University of Petroleum, Qingdao, 266580 China.
authors.forename: Jiandong
authors.initials: J
authors.lastname: He
authors.affiliation: College of Chemical Engineering, China University of Petroleum, Qingdao, 266580 China.|State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhong Shan Rd., Dalian, 116023 China.
authors.forename: Junxue
authors.initials: J
authors.lastname: Liu
authors.affiliation: College of Science, China University of Petroleum, Qingdao, 266580 China.
authors.forename: Fengting
authors.initials: F
authors.lastname: Li
authors.affiliation: College of Science, China University of Petroleum, Qingdao, 266580 China.
authors.forename: Lianqing
authors.initials: L
authors.lastname: Yu
authors.affiliation: College of Science, China University of Petroleum, Qingdao, 266580 China.
authors.forename: Yaping
authors.initials: Y
authors.lastname: Zhang
authors.affiliation: College of Science, China University of Petroleum, Qingdao, 266580 China.
authors.forename: Xiaoyan
authors.initials: X
authors.lastname: Zhou
authors.affiliation: College of Science, China University of Petroleum, Qingdao, 266580 China.
authors.forename: Hongzhang
authors.initials: H
authors.lastname: Ma