title: Mesoporous silica nanospheres decorated with CdS nanocrystals for enhanced photocatalytic and excellent antibacterial activities.
abstract: Uniform SiO2@CdS mesoporous nanospheres with an average diameter of 300 nm have been synthesized successfully by a facile process. The as-prepared mesoporous composite nanospheres have a BET-specific surface area of 640 m(2) g(-1) and an average pore size of 2.82 nm. The results demonstrated that more than 60% Rhodamine B (RhB) dye in solution (4.8 mg L(-1), 50 mL) could be removed by adsorption in the dark for 30 min using the as-prepared SiO2@CdS mesoporous nanospheres (40 mg). The as-prepared SiO2@CdS mesoporous nanospheres have a mesoporous nanostructure, suggesting a higher specific surface area and resulting in a strong adsorption ability. In addition, the mesoporous silica was decorated with ca. 5 nm CdS nanocrystals, which showed excellent photocatalytic activity under visible light and could rapidly remove most of the RhB molecules from a pollutant solution under visible light irradiation. Furthermore, the mesoporous SiO2@CdS nanospheres synthesized by the present protocol exhibited excellent antibacterial activity.
authors.affiliation: Department of Chemistry, College of Chemistry and Life Sciences, Zhejiang Normal University, Jinhua 321004, PR China.
authors.forename: Jin-Lin
authors.initials: JL
authors.lastname: Hu
authors.forename: Qi-Hao
authors.initials: QH
authors.lastname: Yang
authors.forename: He
authors.initials: H
authors.lastname: Lin
authors.forename: Yu-Pei
authors.initials: YP
authors.lastname: Ye
authors.forename: Qiao
authors.initials: Q
authors.lastname: He
authors.forename: Jie-Ni
authors.initials: JN
authors.lastname: Zhang
authors.forename: Hai-Sheng
authors.initials: HS
authors.lastname: Qian
mesh_terms: D000900:Anti-Bacterial Agents / Q000737:chemistry* / Q000494:pharmacology; D019187:Cadmium Compounds / Q000737:chemistry*; D002384:Catalysis; D004926:Escherichia coli / Q000187:drug effects; D005456:Fluorescent Dyes / Q000737:chemistry; D008027:Light; D053758:Nanoparticles / Q000737:chemistry; D054118:Nanospheres / Q000737:chemistry* / Q000648:ultrastructure; D016062:Porosity; D012235:Rhodamines / Q000737:chemistry; D012822:Silicon Dioxide / Q000737:chemistry*; D013440:Sulfides / Q000737:chemistry*
chemical_list: D000900:Anti-Bacterial Agents; D019187:Cadmium Compounds; D005456:Fluorescent Dyes; D012235:Rhodamines; D013440:Sulfides; C034939:cadmium sulfide; D012822:Silicon Dioxide; C029773:rhodamine B