Metal-Organic Framework Templated Z-Scheme ZnInS/BiS Hierarchical Heterojunction for Photocatalytic HO Production from Wastewater.

Metal-organic framework derived materials received a lot of attention due to their significant benefits in photocatalytic reactions. In this work, a Z-scheme ZnInS/BiS 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 BiS possesses a high surface area and porosity, resulting in an efficient charge separation and O capture. Thus, for photocatalytic HO production from the O reduction reaction, the ZnInS/BiS heterojunction can achieve an HO yield of 995 µmol L in pure water and ambient air under visible light, 4.5 and 4 times that of ZnInS and BiS, respectively. In addition, in tetracycline solution, ZnInS/BiS can degrade tetracycline with a degradation rate of 95% by photocatalysis, and at the same time, a final HO production yield of 1223 µmol L is reached. Similarly, high yields of HO 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 HO green synthesis and wastewater treatment.