Construction of g-C3N4-based photo-enzyme-coupled catalytic system and application in the efficient degradation of acridine

Acridine, as a nitrogen heterocyclic pollutant, poses a huge ecological and human health hazard, and its efficient degradation is one of the top tasks. A novel photo-enzyme-coupled catalytic system was constructed by coupling horseradish peroxidase (HRP) with graphite carbon nitride (g-C3N4) through a simple inorganic hybridization process. The obtained g-C3N4/HRP nanoflowers not only increase the enzyme loading capacity and enzyme activity, but also promote the efficient separation of carriers. More importantly, the H2O2 generated by g-C3N4 directly participates in the redox cycle reaction of HRP, inducing photo-enzyme synergistic catalysis. Therefore, compared to HRP nanoflowers and g-C3N4 nanoflowers, g-C3N4/HRP nanoflowers exhibited higher catalytic efficiency for the degradation of acridine. Thus, the photo-enzyme coupled catalyst proposed in this study provides a promising platform for the degradation of acridine pollutants by combining enzymes with photocatalysts through inorganic hybridization.