Facilely in-situ growth of porphyrin metal-organic frameworks on the Ti3C2 MXene/TiO2 for greatly improved photocatalytic hydrogen generation

Developing efficient photocatalysts with high carrier separation and improved light capture are significant means in resolving energy crisis and reducing environmental pollution. Herein, by using the Cu2+ riveted to the partially oxidized MXene (TT) as the growth sites, carboxylporphyrin copper metal-organic frameworks (CuTMOF) was in-situ assembled on the TT-Cu2+, thereby the TT/CuTMOF nanocomposite with a tight in-terfacial connection was constructed. It showed the increased visible absorption as well as charge transfer in the nanocomposite. The photocatalytic behavior in the generation of hydrogen of the TT/CuTMOF na-nocomposite was investigated, showing that the photocatalytic performance of the in-situ growth TT/ CuTMOF nanocomposite was superior to some comparisons (such as TT/TCPP, the mixture of TT and CuTMOF). Especially, the photocatalytic activity of the TT/CuTMOF nanocomposite was about 54.5 times than that of pure TT. Moreover, the TT/CuTMOF nanocomposite showed higher cycle stability with methanol as a sacrificial agent. The photocatalytic mechanism for H2 generation was suggested. This work offers a unique perspective on fabricating greatly effective photocatalytic materials for hydrogen production. & COPY; 2023 Published by Elsevier B.V.