Abstract
Bi2S3/BiOCl composite photocatalysts with various mass fractions of Bi2S3 were successfully synthesized by a facile hydrothermal process at 433 K,characterized by various techniques,and evaluated by the photo-degradation of methyl orange( MO) in an aqueous solution under the irradiation of ultraviolet( UV) light. The results showed that the photocatalytic activity of Bi2S3/BiOCl catalysts was greatly enhanced,compared with that of pure Bi2S3 andBiOCl. Especially,the photocatalytic activity of the 26. 5% Bi2S3/BiOCl sample is very close to that of commercial Degussa P-25( TiO 2),which has been generally recognized as an efficient photocatalyst under UV light irradiation. The remarkably enhanced photocatalytic activity could be mainly attributed to the effective transfer of the photo-generated electrons and holes at the heterojunction interface of Bi2S3 andBiOCl,which reduced the recombination of electron-hole pairs.
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