Efficient photocatalytic H2 production and ofloxacin degradation based on heterodimensional Z-scheme P-C3N4/MIL-88A(Fe) heterojunctions

The production of effective photocatalyst to generate H2 and eliminate pollutants is still a challenge. A simple solvothermal approach is demonstrated for synthesizing a coupled P-C3N4/MIL-88A(Fe) composite wherein two-dimensional phosphorus-doped g-C3N4 nanosheets are attached to three-dimensional MIL88A. The P-CN/MIL-88A composite shows superior photocatalytic ability with a high hydrogen generation rate of 34.53 mmol/(g center dot h) and an ofloxacin degradation rate of 95.6%. The H2 evolution rate of the composite is approximately 38.3 times that of bulk g-C3N4 (B-CN). The enhancement mechanisms resulting in high efficiency and adaptability are attributed to the Z-scheme (2D/3D) P-CN/MIL-88A heterojunction, which has unique synergistic interface properties, good photoinduced electron mobility, and good electron-hole pair separation ability. This work provides insights into the design of 2D/3D heterostructure photocatalysts for highly efficient and simultaneous photocatalytic H2 production and antibiotic degradation. (c) 2022 Elsevier B.V. All rights reserved.

Automated summary

This study demonstrates a solvothermal approach to synthesize a P-C3N4/MIL-88A composite, which exhibits superior photocatalytic performance in terms of hydrogen generation rate and ofloxacin degradation rate. The enhancement mechanisms are attributed to the unique interface properties, good photoinduced electron mobility, and electron-hole pair separation ability of the 2D/3D heterojunction.