title: Constructing a MoS₂ QDs/CdS Core/Shell Flowerlike Nanosphere Hierarchical Heterostructure for the Enhanced Stability and Photocatalytic Activity.
abstract: MoS₂ quantum dots (QDs)/CdS core/shell nanospheres with a hierarchical heterostructure have been prepared by a simple microwave hydrothermal method. The as-prepared samples are characterized by XRD, TEM, SEM, UV-VIS diffuse reflectance spectra (DRS) and N₂-sorption in detail. The photocatalytic activities of the samples are evaluated by water splitting into hydrogen. Results show that the as-prepared MoS₂ QDs/CdS core/shell nanospheres with a diameter of about 300 nm are composed of the shell of CdS nanorods and the core of MoS₂ QDs. For the photocatalytic reaction, the samples exhibit a high stability of the photocatalytic activity and a much higher hydrogen evolution rate than the pure CdS, the composite prepared by a physical mixture, and the Pt-loaded CdS sample. In addition, the stability of CdS has also been greatly enhanced. The effect of the reaction time on the formations of nanospheres, the photoelectric properties and the photocatalytic activities of the samples has been investigated. Finally, a possible photocatalytic reaction process has also been proposed.
authors.affiliation: State Key Laboratory of Photocatalysis on Energy and Environment, Fuzhou University, Fuzhou 350002, China. sjliang2011@gmail.com.|Department of Environmental Science and Engineering, College of Environment and Resource Fuzhou University, Minhou, Fujian 350108, China. sjliang2011@gmail.com.|Department of Mechanical Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China. sjliang2011@gmail.com.
authors.forename: Shijing
authors.initials: S
authors.lastname: Liang
authors.affiliation: Department of Environmental Science and Engineering, College of Environment and Resource Fuzhou University, Minhou, Fujian 350108, China. fdzhouzming@163.com.
authors.forename: Zhouming
authors.initials: Z
authors.lastname: Zhou
authors.affiliation: Department of Environmental Science and Engineering, College of Environment and Resource Fuzhou University, Minhou, Fujian 350108, China. wxqbelieve@163.com.
authors.forename: Xiuqin
authors.initials: X
authors.lastname: Wu
authors.affiliation: State Key Laboratory of Photocatalysis on Energy and Environment, Fuzhou University, Fuzhou 350002, China. liangzhu-2015@outlook.com.
authors.forename: Shuying
authors.initials: S
authors.lastname: Zhu
authors.affiliation: State Key Laboratory of Photocatalysis on Energy and Environment, Fuzhou University, Fuzhou 350002, China. bijinhong@fzu.edu.cn.|Department of Environmental Science and Engineering, College of Environment and Resource Fuzhou University, Minhou, Fujian 350108, China. bijinhong@fzu.edu.cn.
authors.forename: Jinhong
authors.initials: J
authors.lastname: Bi
authors.affiliation: Department of Mechanical Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China. mmlmzhou@polyu.edu.hk.
authors.forename: Limin
authors.initials: L
authors.lastname: Zhou
authors.affiliation: State Key Laboratory of Photocatalysis on Energy and Environment, Fuzhou University, Fuzhou 350002, China. mhliu2000@fzu.edu.cn.|Department of Environmental Science and Engineering, College of Environment and Resource Fuzhou University, Minhou, Fujian 350108, China. mhliu2000@fzu.edu.cn.
authors.forename: Minghua
authors.initials: M
authors.lastname: Liu
authors.affiliation: State Key Laboratory of Photocatalysis on Energy and Environment, Fuzhou University, Fuzhou 350002, China. wuling@fzu.edu.cn.
authors.forename: Ling
authors.initials: L
authors.lastname: Wu
mesh_terms: D019187:Cadmium Compounds / Q000138:chemical synthesis* / Q000737:chemistry; D002384:Catalysis; D004220:Disulfides / Q000737:chemistry*; D006859:Hydrogen / Q000737:chemistry; D008982:Molybdenum / Q000737:chemistry*; D054118:Nanospheres / Q000737:chemistry*; D010316:Particle Size; D055668:Photochemical Processes; D045663:Quantum Dots / Q000737:chemistry*
chemical_list: D019187:Cadmium Compounds; D004220:Disulfides; D006859:Hydrogen; D008982:Molybdenum; C082964:molybdenum disulfide
keywords: CdS-based composite; MoS2 QDs; core-shell structure; photocatalysis; water splitting