Research on the Construction of CuFeS2/ Bi2O3 Composite Materials and Degradation of Bisphenol A by Activating PMS

Bisphenol A (BPA) is harmful to human health. Advanced oxidation technologies using peroxymonosulfate (PMS) can effectively remove organic pollutants. Among these technologies, bimetallic sulfides stand out for their excellent activation ability. This study focuses on CuFeS2, and CuFeS2/Bi2O3 catalysts were prepared using a hydrothermal method. The CFSBO-2/PMS system can degrade up to 84.06% of BPA in just 30 seconds. XRD analysis shows that compared to the original CFS, the CFSBO catalyst significantly enhances the intensity of diffraction peaks, indicating improved crystallinity. The system maintains high degradation efficiency as the pH increases from 3.6 to 9.0, suggesting that the catalyst is highly adaptable to different water treatment conditions. The main active species generated are SO4−•, •OH, and 1O2. PMS activation in this system is driven by the redox cycles of Cu+/Cu2+, Fe2+/Fe3+, and Bi3+/Bi5+.