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A Facile method to Prepare Monodispersed CdS/SiO 2 Composite Microspheres and Investigation on Their Photocatalytic Properties
Author(s) -
Peng Cheng,
Cheng Xinjian,
Chen Sufang,
Li Xianghong,
Li Tingcheng,
Zhang Daohong,
Huang Zhengxi,
Zhang Aiqing
Publication year - 2012
Publication title -
photochemistry and photobiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.818
H-Index - 131
eISSN - 1751-1097
pISSN - 0031-8655
DOI - 10.1111/j.1751-1097.2012.01188.x
Subject(s) - photocatalysis , composite number , materials science , microsphere , chemical engineering , dispersion (optics) , catalysis , composite material , chemistry , organic chemistry , physics , optics , engineering
This article presents a facile method to prepare CdS/SiO 2 composite microspheres and their good catalytic properties. In our method, monodispersed SiO 2 particles bearing amino groups (–NH 2 ) were synthesized at first and then used as carriers to load nanosized CdS particles to form CdS/SiO 2 composite microspheres. With the addition of CdAc 2 solution to the SiO 2 dispersion, Cd 2+ was attracted to the surfaces of the SiO 2 particles through coordination interaction, and then thioacetamide was added to the dispersion. By heating, S 2− released and reacted with the Cd 2+ , CdS/SiO 2 composite microspheres were obtained accordingly. The photocatalytic properties of the as‐prepared composite microspheres were investigated as well. It was found that the composite microspheres have excellent photocatalytic activities for the degradation of dyes comparing with the commercial P‐25 TiO 2 catalysts. After using and recycling for three times, the photocatalytic performance still remained very well.