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 16nm, a band gap of 4.4eV, and a specific surface area of 91.8m2g−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.
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