Mineralized degradation of bisphenol A by novel photoenzyme-metal catalyst FCAP@Ag₃PO₄/Lac-Pd beads

Photoenzyme synergistic catalytic technology could efficiently convert a refractory organic compound such as bisphenol A in water into non-toxic CO₂ and H₂O under relatively mild and green conditions, representing one of the most potential low-carbon pollution reduction technologies. In this work, the functional alginate FCAP@Ag₃PO₄/Lac-Pd beads with 3 mm diameter were prepared for the first time to realize the mineralized degradation of bisphenol A. In the photoenzyme-metal catalytic system, the high catalytic activity arises from Pd anchoring, Ag₃PO₄ transferred the photoelectrons generated on the surface to laccase molecule promoting to complete its redox reaction and leading to synergistic catalysis. Bisphenol A was completely mineralized into CO₂ and H₂O using FCAP@Ag₃PO₄/Lac-Pd beads treating the solution of concentration 20 mg L^-1 for 4 h under visible light irradiation, without producing new organic materials. The FCAP@Ag₃PO₄/Lac-Pd beads still have considerable degradation of bisphenol A in lake water, coal washing water, and coking wastewater and the degradation efficiency was all above 85.4 %. This work would provide an innovative approach for the mineralized degradation of refractory organic pollution in water.