title: Hierarchical layered Ni(3)S(2)-graphene hybrid composites for efficient photocatalytic reduction of Cr(VI).
abstract: Exploring visible light responsive media remains a challenge for solar energy photocatalysis applications. We report the Ni3S2-reduced graphene oxide (NG) hybrid composites with sheet-on-sheet structures synthesized by a facile microwave-assisted method. Their morphology, structure and photocatalytic activity in the reduction of Cr(VI) were characterized by scanning electron microscopy, X-ray diffraction, UV-Vis absorption spectroscopy, and electrochemical impedance spectra, respectively. The results show that NG hybrid composites show excellent visible light photocatalytic activity in the reduction of Cr(VI) compared to pure Ni3S2. The Cr(VI) reduction rate of higher than 90% has been achieved with 1wt.% reduced graphene oxide under visible light irradiation at 180min. Improvement is attributed to its efficient charge separation and more active sites due to the integrative effect and good interfacial contact between Ni3S2and reduced graphene oxide.
authors.affiliation: Institute of Coordination Bond Metrology and Engineering, College of Materials Science and Engineering, China Jiliang University, Hangzhou 310018, China.
authors.forename: Pinpin
authors.initials: P
authors.lastname: Hu
authors.affiliation: Institute of Coordination Bond Metrology and Engineering, College of Materials Science and Engineering, China Jiliang University, Hangzhou 310018, China. Electronic address: lxj669635@126.com.
authors.forename: Xinjuan
authors.initials: X
authors.lastname: Liu
authors.affiliation: Institute of Coordination Bond Metrology and Engineering, College of Materials Science and Engineering, China Jiliang University, Hangzhou 310018, China.
authors.forename: Baibai
authors.initials: B
authors.lastname: Liu
authors.affiliation: School of Mechanical and Electrical Engineering, Yangtze Normal University, Chongqing 408100, China.
authors.forename: Lei
authors.initials: L
authors.lastname: Li
authors.affiliation: State Key Laboratory of Optoelectronic Materials and Technologies, Nanotechnology Research Center, School of Materials Science & Engineering, Sun Yat-sen University, Guangzhou 510275, China.
authors.forename: Wei
authors.initials: W
authors.lastname: Qin
authors.affiliation: Institute of Coordination Bond Metrology and Engineering, College of Materials Science and Engineering, China Jiliang University, Hangzhou 310018, China.
authors.forename: Huangze
authors.initials: H
authors.lastname: Yu
authors.affiliation: Institute of Coordination Bond Metrology and Engineering, College of Materials Science and Engineering, China Jiliang University, Hangzhou 310018, China.
authors.forename: Sisi
authors.initials: S
authors.lastname: Zhong
authors.affiliation: Zhejiang Academy of Science and Technology for Inspection and Quarantine, Hangzhou 311215, China.
authors.forename: Yan
authors.initials: Y
authors.lastname: Li
authors.affiliation: Institute of Applied Chemistry, Shanxi University, Taiyuan 030006, China. Electronic address: zxren@sxu.edu.cn.
authors.forename: Zhenxing
authors.initials: Z
authors.lastname: Ren
authors.affiliation: Institute of Applied Chemistry, Shanxi University, Taiyuan 030006, China.
authors.forename: Mengliang
authors.initials: M
authors.lastname: Wang
keywords: Cr(VI); Ni(3)S(2); Reduced graphene oxide; Sheet-on-sheet structures; Transition metal dichalcogenides