Abstract
The development of efficient and environmentally friendly water treatment technologies is essential for the treatment of emerging pollutants. In this study, a ZIF-62 catalyst embedded with Fe-O was prepared for the visible-light assisted activation of peroxymonosulfate (PMS) to achieve the removal of bisphenol A by coupling photogenerated carriers with the non-radical pathway. The embedding of Fe-O narrowed the bandgap width (reduced from 3.07 eV to 2.37 eV), enhanced the overall photoresponse performance, and improved the segregation of photogenerated carriers. The upward shift of the d-band center contributes to the adsorption of PMS. The embedding of Fe-O improves the BPA removal kinetics by a factor of 15.4 (increased from 0.00391 min−1 to 0.06005 min−1). Surface-activated complexes played a dominant role in the removal of BPA in this system, and photogenerated holes (h+) and singlet oxygen (1O2) were also involved in the removal of BPA. In addition, the system has good pH adaptability (pH = 3 ∼ 11) and good environmental suitability. Toxicity assessment showed that the overall toxicity of the intermediates tended to decrease. This study provides new insights into visible-light assisted activation of PMS.
Published Version
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