title: Synthesis of Highly Monodispersed CdS/SiO2 Core-Shell Nanoparticles and Their Photocatalytic Activities.
abstract: Monodispersed CdS/SiO2 core-shell composite nanoparticles with effective photocatalytic activity were successfully synthesized. The structure and morphologies of composite nanoparticles were characterized by XRD, FTIR, TEM, and high-resolution transmission electron microscopy (HRTEM). Results showed that the CdS/SiO2 composite nanoparticles exhibited obvious core-shell structure, and that the thickness of the SiO2 shell could be reduced by either increasing the water/alcohol volume ratio or decreasing TEOS amount. The photocatalytic activity of the prepared composite nanoparticles was determined by degradation of methylene blue (MB) in aqueous solution. CdS/SiO2 showed a lower photocatalytic activity compared with CdS nanoparticles. However, the residual concentration of Cd2+ in aqueous solution after MB complete degradation was reduced by half.
authors.forename: Qinghua
authors.initials: Q
authors.lastname: Guo
authors.forename: Yifeng
authors.initials: Y
authors.lastname: Zhou
authors.forename: Wangyan
authors.initials: W
authors.lastname: Nie
authors.forename: Pengpeng
authors.initials: P
authors.lastname: Chen
authors.forename: Linyong
authors.initials: L
authors.lastname: Song