Reconstruction of D-Π-A Polymer Accelerating Photocatalytic Degradation of BPA and Production of H2O2

Advanced oxidation processes (AOPs) using hydroxyl radicals (center dot OH) as oxidizing agents are a promising technology. Herein, a feasible strategy is developed to initially construct carbazole-based D-pi-A type conjugated polymer (PBNCZ) via the oxidative coupling. Additionally, introducing COO- through Cyano hydrolysis extends its conjugated structure and improves the energy band structure, which greatly facilitates the generation of center dot OH as well as the enrichment of pollutants. Detailed experiments and theoretical calculations have proved that the introduction of COO- enhances the adsorption of O-2 and bisphenol A (BPA), optimizing the reaction path of center dot OH. Thus, it completely decomposes 10 ppm of BPA within just 10 min, exceeding all previously organic photocatalysts. Meanwhile, the efficiency of photocatalytic H2O2 production by PBNCZ-COO- reaches 1719.03 mu mol h(-1) g(-1 )under visible light. This multifunctional material with high adsorption capacity, photodegradation efficiency, and photocatalytic H2O2 production activity provides a solid foundation for the preparation of organic photocatalysts.