A promising new photocatalyst CdSnO3·3H2O for air purification under ambient condition

Authors:  Yibin Chen, Danzhen Li, Jing Chen, Jinxiu Wang, Sugang Meng, Jiangjun Xian, Xianzhi Fu, Yu Shao

Abstract:
A new binary metal hydrate photocatalyst CdSnO₃·3H₂O was synthesized from Cd(CH₃COO)₂ and SnCl₄·5H₂O via a facile homogenous precipitation method. The photocatalytic activities of samples were evaluated by the photocatalytic degradation of volatile organic compounds (VOCs)in O₂ gas stream under ultraviolet light irradiation. The results demonstrated that the typical CdSnO₃·3H₂O sample had an average particle size of about 16 nm, a band gap of 4.4 eV, and a specific surface area of 91.8 m² g⁻¹. The comparison of CdSnO₃·3H₂O synthesized at different pH values showed that the photocatalytic activities of CdSnO₃·3H₂O synthesized at pH 7 and 8 were higher than that of the samples synthesized at pH 6 and 9. Contrast to commercial P25-TiO₂, the activity of this new photocatalyst was better. The conversion ratio of benzene was about 45% and 5%, corresponding to the mineralization ratio was about 60% and 25%, respectively. CdSnO₃·3H₂O also exhibited high photocatalytic activities towards cyclohexane and acetone. Then, the mechanism of the reaction on the new photocatalyst was discussed. Hence, the facile synthesis of this photocatalyst and its outstanding photocatalytic performance for VOCs are favorable to its potential application in the environmental remedy field.

Keywords:
CdSnO₃·3H₂O
Photocatalysis
Homogenous precipitation
Volatile organic compounds

Published in: Applied catalysis B: Environmental  (Volume 129, Pages 1-614, 17 January 2013)

Publisher: Elsevier  

ISSN Information: 0926-3373

A promising new photocatalyst CdSnO3·3H2O for air purification under ambient condition

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