title: Biomolecule-assisted construction of cadmium sulfide hollow spheres with structure-dependent photocatalytic activity.
abstract: In this study, we report the synthesis of monodispersive solid and hollow CdS spheres with structure-dependent photocatalytic abilities for dye photodegradation. The monodispersive CdS nanospheres were constructed with the assistance of the soulcarboxymthyi chitosan biopolymer under hydrothermal conditions. The solid CdS spheres were corroded by ammonia to form hollow CdS nanospheres through a dissolution-reprecipitation mechanism. Their visible-light photocatalytic activities were investigated, and the results show that both the solid and the hollow CdS spheres have visible-light photocatalytic abilities for the photodegradation of dyes. The photocatalytic properties of the CdS spheres were demonstrated to be structure dependent. Although the nanoparticles comprising the hollow spheres have larger sizes than those comprising the solid spheres, the hollow CdS spheres have better photocatalytic performances than the solid CdS spheres, which can be attributed to the special hollow structure.
authors.affiliation: State Key Laboratory of Coordination Chemistry, Coordination Chemistry Institute, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, PR China.
authors.forename: Chengzhen
authors.initials: C
authors.lastname: Wei
authors.forename: Wenzhe
authors.initials: W
authors.lastname: Zang
authors.forename: Jingzhou
authors.initials: J
authors.lastname: Yin
authors.forename: Qingyi
authors.initials: Q
authors.lastname: Lu
authors.forename: Qun
authors.initials: Q
authors.lastname: Chen
authors.forename: Rongmei
authors.initials: R
authors.lastname: Liu
authors.forename: Feng
authors.initials: F
authors.lastname: Gao
mesh_terms: D019187:Cadmium Compounds / Q000737:chemistry*; D002384:Catalysis; D008855:Microscopy, Electron, Scanning; D053769:Nanocapsules / Q000737:chemistry*; D010777:Photochemistry; D013329:Structure-Activity Relationship; D013440:Sulfides / Q000737:chemistry*
chemical_list: D019187:Cadmium Compounds; D053769:Nanocapsules; D013440:Sulfides; C034939:cadmium sulfide