Abstract
Photoelectrocatalytic (PEC) technology has been demonstrated to be an effective method for environmental remediation, but its efficiency in detoxifying persistent pollutants such as bisphenol A (BPA) requires further enhancement. Herein, an enzyme-coupled PEC system for detoxification of BPA was proposed by integrating a Bismuth-doped TiO2 Nanotubes (Bi-TiO2 NTs) photoanode and laccase-immobilized cathode. The results reveal that the doping of Bi into TiO2 enhances the visible light absorption and reduces the recombination of photogenerated electron-hole pairs when exposed to simulated solar irradiation. When the laccase-immobilized cathode was incorporated into the PEC device, the resulting biophotoelectrocatalytic system exhibited excellent degradation performance for BPA, owing to the synergistic effect between enzymatic catalysis and photoelectrocatalysis. A potential degradation pathway for BPA was established through the analysis of intermediate products, and subsequent phytotoxicity assessments revealed a significant reduction in the toxicity of the laccase-coupled PEC-degraded BPA solution. This study highlights that coupling a laccase-immobilized cathode with Bi-doped TiO2 NTs photoanodes serves as an effective method for the detoxification of persistent pollutants.
Published Version
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