title: In situ photo-assisted deposition of MoS₂ electrocatalyst onto zinc cadmium sulphide nanoparticle surfaces to construct an efficient photocatalyst for hydrogen generation.
abstract: We reported herein a facile and scalable preparation process for MoS(2)-decorated Zn(x)Cd(1-x)S hybrid photocatalysts for hydrogen generation. Zn(x)Cd(1-x)S nanopowder was first prepared from commercially available precursors employing a solution based process. MoS(2) hydrogen evolution reaction catalyst was then loaded onto the Zn(x)Cd(1-x)S nanopowder via a photo-assisted deposition process which employed mild conditions (room temperature, atmospheric pressure and visible light illumination). Thus, this process represents an important advantage in the large scale production of semiconductor/MoS(2) hybrid photocatalysts in comparison to the conventional method relying on thermal decomposition of (NH(4))(2)[MoS(4)] precursor at high temperature and under H(2)S pressure. The best Zn(0.2)Cd(0.8)S/MoS(2) 3% showed two hundred-and-ten times (210 times) faster hydrogen generation rate on visible light illumination compared with that obtained for un-treated Zn(0.2)Cd(0.8)S. That was the most impressive catalytic enhancement ever recorded for a semiconductor photocatalyst decorated with a noble metal free electrocatalyst.
authors: Energy Research Institute @ Nanyang Technological University, Singapore.
authors: Mai
authors: M
authors: Nguyen
authors: Phong D
authors: PD
authors: Tran
authors: Stevin S
authors: SS
authors: Pramana
authors: Rui Lin
authors: RL
authors: Lee
authors: Sudip K
authors: SK
authors: Batabyal
authors: Nripan
authors: N
authors: Mathews
authors: Lydia H
authors: LH
authors: Wong
authors: Michael
authors: M
authors: Graetzel
mesh_terms: D019187:Cadmium Compounds / Q000737:chemistry* / Q000528:radiation effects; D002384:Catalysis; D006859:Hydrogen / Q000737:chemistry* / Q000302:isolation & purification*; D008027:Light; D008422:Materials Testing; D008982:Molybdenum / Q000737:chemistry* / Q000528:radiation effects; D053758:Nanoparticles / Q000737:chemistry* / Q000528:radiation effects; D011829:Radiation Dosage; D013440:Sulfides / Q000737:chemistry* / Q000528:radiation effects; D013499:Surface Properties / Q000528:radiation effects; D017967:Zinc Compounds / Q000737:chemistry* / Q000528:radiation effects
chemical_list: D019187:Cadmium Compounds; D013440:Sulfides; D017967:Zinc Compounds; C034939:cadmium sulfide; D006859:Hydrogen; D008982:Molybdenum; C031238:zinc sulfide