To solve the pollution problem of halogenated phenol wastewater,a graphitic carbon nitride (g-C3N4) and organic semiconductor (PDI) composite photocatalyst was successfully prepared.The crystal structure and chemical composition of the composite material were characterized using X-ray powder diffraction (XRD),X-ray photoelectron spectroscopy (XPS) and ultraviolet-visible diffuse reflectance spectroscopy (UV-Vis).In addition,the photocatalytic performance of the horseradish peroxidase (HRP) and g-C3N4/PDI-X cascaded system was investigated in the photoenzyme-driven defluorination reaction of 2-methyl-4-fluorophenol.The results revealed that,when utilizing g-C3N4/PDI-X as the photocatalyst for in situ H2O2 generation and HRP as the oxidant in a sodium phosphate buffer solution (pH 7.0),the defluorination conversion rate achieved 43%,which was significantly higher than that of single-component systems (with defluorination conversion rates below 5% for either HRP or g-C3N4/PDI-X alone).These findings confirmed that the composite catalyst effectively enhanced defluorination efficiency through a synergistic photocatalytic-enzymatic interaction.
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基金资助
国家自然科学基金(32460230);内蒙古自治区自然科学基金项目(2024QN02016);直属高校基本科研业务费项目(GXKY25Z046);内蒙古民族大学博士科研启动基金项目(BS623);内蒙古自治区本级事业单位引进人才科研启动绩效项目(RCQD20003)
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