查找使用阿拉丁产品的科研文献

A novel Bi2S3/Bi2WO6/SnS2 photocatalyst with a double Z-scheme heterojunction for highly efficient degradation of antibiotics under visible light

Xuemei Chen,Pengfei Zhu,Xiya Xin,Yu Chen,Xinglin Li

In this paper, a novel and highly efficient Bi 2 S 3 /Bi 2 WO 6 /SnS 2 double Z-scheme heterojunction photocatalyst was synthesized by a solvothermal method for the degradation of tetracycline hydrochloride (TC). After 60 min of visible light photocatalytic reaction, the degradation rate of TC at 20 mg/L by the Bi 2 S 3 /Bi 2 WO 6 /SnS 2 catalyst was as high as 92.33 %, the removal rate of total organic carbon (TOC) was 66.15 %, and the toxicity of the TC degradation solution decreased significantly. The pseudo-first-order reaction kinetics fitting constant (0.02731 min −1 ) for its photocatalytic degradation of TC was 5.71 and 1.87 times that of pure Bi 2 WO 6 (0.00478 min −1 ) and Bi 2 S 3 /Bi 2 WO 6 (0.01462 min −1 ), respectively. Meanwhile, the Bi 2 S 3 /Bi 2 WO 6 /SnS 2 photocatalyst also has excellent salt tolerance, versatility and cycling stability, showing good application potential. Multiple characterization results reveal that the enhancement of the activity of the Bi 2 S 3 /Bi 2 WO 6 /SnS 2 photocatalyst is mainly due to the fact that, on the one hand, the coupling of Bi 2 S 3 and SnS 2 to Bi 2 WO 6 greatly improves the visible light response ability of the catalyst. On the other hand, it significantly increases the surface area of the catalyst, not only enhancing its adsorption capacity but also exposing more surface active sites. Most importantly, the formation of the double Z-scheme heterojunction between Bi 2 S 3 , SnS 2 and Bi 2 WO 6 enhances the interfacial charge transfer efficiency, thereby promoting the effective separation of photogenerated electrons and holes. This paper provides a new strategy for purifying antibiotics in water by using Bi 2 WO 6 -based photocatalysts.