Metal‐Organic Framework Templated Z‐Scheme ZnIn₂S₄/Bi₂S₃ Hierarchical Heterojunction for Photocatalytic H₂O₂ Production from Wastewater

Abstract

Abstract Metal‐organic framework derived materials received a lot of attention due to their significant benefits in photocatalytic reactions. In this work, a Z‐scheme ZnIn 2 S 4 /Bi 2 S 3 hierarchical heterojunction is first developed by a one‐pot method using CAU‐17 as a template. The specific preparation method endows an intimate interface contact between these two monomers, and CAU‐17‐derived Bi 2 S 3 possesses a high surface area and porosity, resulting in an efficient charge separation and O 2 capture. Thus, for photocatalytic H 2 O 2 production from the O 2 reduction reaction, the ZnIn 2 S 4 /Bi 2 S 3 heterojunction can achieve an H 2 O 2 yield of 995 µmol L −1 in pure water and ambient air under visible light, 4.5 and 4 times that of ZnIn 2 S 4 and Bi 2 S 3 , respectively. In addition, in tetracycline solution, ZnIn 2 S 4 /Bi 2 S 3 can degrade tetracycline with a degradation rate of 95% by photocatalysis, and at the same time, a final H 2 O 2 production yield of 1223 µmol L −1 is reached. Similarly, high yields of H 2 O 2 are also obtained from wastewater containing o ‐nitrophenol, acid golden yellow, or acid red, and these pollutants are effectively degraded. This work reveals the potential of metal‐organic framework‐derived materials in photocatalysis, as well as provides insights into H 2 O 2 green synthesis and wastewater treatment.