title: Sonochemistry synthesis and enhanced photocatalytic H2-production activity of nanocrystals embedded in CdS/ZnS/In2S3 microspheres.
abstract: ZnS and CdS nanocrystals with a size of 5-10 nm embedded in CdS/ZnS/In(2)S(3) microspheres have been successfully synthesized by a sonochemistry method at room temperature and normal pressure without the use of templates or surfactants. The as-prepared products have been characterized by X-ray diffraction (XRD), field-emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), EDX line spectrum, high-angle annular dark-field imaging (HAADF), UV-visible diffuse reflectance spectra (UV-vis) and photoluminescence (PL) spectra. The reaction process in the solution under ultrasonic irradiation was investigated by gas chromatography-mass spectrometry (GC-MS). The mechanisms of phase formation and morphology control of CdS/ZnS/In(2)S(3) microspheres are proposed and discussed in detail. Furthermore, the photocatalytic activity of CdS/ZnS/In(2)S(3) for water splitting was investigated under visible-light irradiation (λ > 400 nm) and an especially high photocatalytic activity (apparent yield is 40.9% at 420 nm) was achieved in the absence of co-catalysts.
authors.affiliation: Department of Chemistry, Harbin Institute of Technology, Harbin, 150001, People's Republic of China.
authors.forename: Zaoyu
authors.initials: Z
authors.lastname: Shen
authors.forename: Gang
authors.initials: G
authors.lastname: Chen
authors.forename: Qun
authors.initials: Q
authors.lastname: Wang
authors.forename: Yaoguang
authors.initials: Y
authors.lastname: Yu
authors.forename: Chao
authors.initials: C
authors.lastname: Zhou
authors.forename: Yu
authors.initials: Y
authors.lastname: Wang
mesh_terms: D019187:Cadmium Compounds / Q000737:chemistry* / Q000528:radiation effects; D002384:Catalysis; D006859:Hydrogen / Q000737:chemistry* / Q000302:isolation & purification; D007204:Indium / Q000737:chemistry* / Q000528:radiation effects*; D008027:Light; D046911:Macromolecular Substances / Q000737:chemistry; D008422:Materials Testing; D008863:Microspheres; D008968:Molecular Conformation; D049329:Nanostructures / Q000737:chemistry* / Q000528:radiation effects / Q000648:ultrastructure; D010316:Particle Size; D010777:Photochemistry / Q000379:methods; D018036:Selenium Compounds / Q000737:chemistry* / Q000528:radiation effects; D013010:Sonication / Q000379:methods*; D013440:Sulfides / Q000737:chemistry* / Q000528:radiation effects; D013499:Surface Properties; D017967:Zinc Compounds / Q000737:chemistry* / Q000528:radiation effects
chemical_list: D019187:Cadmium Compounds; D046911:Macromolecular Substances; D018036:Selenium Compounds; D013440:Sulfides; D017967:Zinc Compounds; D007204:Indium; C034939:cadmium sulfide; D006859:Hydrogen; C044696:zinc selenide