A covalent organic framework based on BOPHY/TiO2 hybrid photocatalysts for solar driven hydrogen production
JOURNAL OF MATERIALS CHEMISTRY A(2024)
摘要
The conversion of sunlight into chemical energy to produce solar hydrogen opens the door to one promising solution towards a sustainable alternative in the current energy crisis. Herein, we describe the successful synthesis of the first COF based on BOPHY dye (IEC-2 ) ever reported in the literature. Its beta-ketoenamine linkage confers outstanding chemical stability for light-driven applications. The hybrid photocatalyst based on IEC-2 and TiO2 (10 wt% of COF loading) was studied for solar hydrogen evolution at both the lab-scale, and semi-pilot plant scale under natural sunlight. IEC-2@T-10 achieved a hydrogen production of 180.9 mu mol g(-1) under 6 h solar illumination, which increased by 36% with respect to that of benchmark TiO2. The high performance of IEC-2@T-10 results in a greater photonic efficiency than that of TiO2 (0.12% and 0.08%, respectively), highlighting the robustness of the BOPHY COF for light-mediated reactions.
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