1. 阜阳师范学院 化学与材料工程学院,安徽 阜阳,236037
2. 安徽环境污染物降解与监测省级实验室,安徽 阜阳,236037
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李慧泉, 朱良俊, 孙倩等. Bi<sub>2</sub>S<sub>3</sub>/BiOCl复合光催化剂的水热合成及其高活性[J]. 发光学报, 2015,36(2): 176-185
LI Hui-quan, ZHU Liang-jun, SUN Qian etc. Hydrothermal Synthesis and High Activity of Bi<sub>2</sub> S<sub>3</sub>/BiOCl Composite Photocatalysts[J]. Chinese Journal of Luminescence, 2015,36(2): 176-185
李慧泉, 朱良俊, 孙倩等. Bi<sub>2</sub>S<sub>3</sub>/BiOCl复合光催化剂的水热合成及其高活性[J]. 发光学报, 2015,36(2): 176-185 DOI: 10.3788/fgxb20153602.0176.
LI Hui-quan, ZHU Liang-jun, SUN Qian etc. Hydrothermal Synthesis and High Activity of Bi<sub>2</sub> S<sub>3</sub>/BiOCl Composite Photocatalysts[J]. Chinese Journal of Luminescence, 2015,36(2): 176-185 DOI: 10.3788/fgxb20153602.0176.
采用一种简便的水热法在433 K的温度下成功合成了具有不同Bi,2,S,3,质量分数的Bi,2,S,3,/BiOCl复合光催化剂,利用各种技术对其进行了表征.在紫外光照射下,以甲基橙水溶液的光催化降解为模型反应,评价了Bi,2,S,3,/BiOCl复合光催化剂的活性.研究结果表明:与纯Bi,2,S,3,和纯BiOCl相比,Bi,2,S,3,/BiOCl样品明显具有更高的光催化性能,尤其当Bi,2,S,3,在Bi,2,S,3,/BiOCl中的质量分数为26.5%时,Bi,2,S,3,/BiOCl复合催化剂的光催化活性与商业P25(TiO,2,)的活性非常接近,而这种商业P25在紫外光照射下是公认的高效光催化剂.这种明显提高的光催化活性主要归功于光生电子和空穴在Bi,2,S,3,和BiOCl形成异质结界面上的有效转移,降低了电子-空穴对的复合.
Bi,2,S,3,/BiOCl composite photocatalysts with various mass fractions of Bi,2,S,3, 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 Bi,2,S,3,/BiOCl catalysts was greatly enhanced, compared with that of pure Bi,2,S,3, and BiOCl. Especially, the photocatalytic activity of the 26.5%Bi,2,S,3,/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 Bi,2,S,3, and BiOCl, which reduced the recombination of electron-hole pairs.
水热法Bi2S3/BiOCl复合光催化剂甲基橙
hydrothermal methodBi2S3/BiOClcomposite photocatalystsmethyl orange
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