A novel hyper-crosslinked In2S3@HLZU-1 heterojunction through molecular expansion was carefully designed and fully characterized. Hyper-cross-linked LZU-1(HLZU-1) with tunable specific surface area and pore volume through coupling Friedel-Crafts reaction was synthesized, in which 1,4-Bis(chloromethyl)benzene as the expansion molecules were pillared between the layers of LZU-1. This synthetic strategy not only increased the specific surface area and average pore volume of LZU-1 by 76.7 and 31.2 times, but also greatly enhanced the photocatalytic performance. The degradation rate of 50 ml, 40 ppm TC solution can reach 90% in 1 h under visible light, and the maximum hydrogen evolution rate under visible light is 11920.42 μmol·g-1·h-1. The performance of the heterojunction photocatalyst is mainly attributed to: (i) the matching energy band structure between In2S3 and HLZU-1, which ensures the effective separation of photogenerated holes and electrons, and (ii) the hyper-crosslinked treatment can improve the photo-absorption and photocatalytic properties of the catalyst. A Z-type photocatalytic mechanism was proposed based on radical trapping experiments and the electron spin resonance (ESR) analyses. This study developed an effective molecular expansion strategy to synthesize COFs-based catalysts with more catalytic sites for potential applications in the environmental field.

You have access to this article

Please wait while we load your content... Something went wrong. Try again?