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 H 2 and eliminate pollutants is still a challenge. A simple solvothermal approach is demonstrated for synthesizing a coupled P-C 3 N 4 /MIL-88A(Fe) composite wherein two-dimensional phosphorus-doped g-C 3 N 4 nanosheets are attached to three-dimensional MIL-88A. The P-CN/MIL-88A composite shows superior photocatalytic ability with a high hydrogen generation rate of 34.53 mmol/(g·h) and an ofloxacin degradation rate of 95.6%. The H 2 evolution rate of the composite is approximately 38.3 times that of bulk g-C 3 N 4 (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 H 2 production and antibiotic degradation. • A novel Z-scheme (2D/3D) P-CN/MIL-88A photocatalyst was prepared by solvothermal method. • The P-CN 300 /MIL-88A exhibits the superior photocatalytic performance for H 2 evolution and ofloxacin degradation. • The •O 2 and •OH are confirmed as the main reactive species in the photocatalytic activity. • The possible mechanism of photocatalytic was explored. [ABSTRACT FROM AUTHOR]