Enhanced visible-light-assisted peroxymonosulfate activation over MnFe2O4 modified g-C3N4/diatomite composite for bisphenol A degradation

• DOI: 10.1016/j.ijmst.2021.11.008
• Publication Date: 2021-11-24T23:33:21Z
• Authors: Xiangwei Zhang; Chunquan Li; Ting Chen; Ye Tan; Xiaorui Liu; Fang Yuan; Shuilin Zheng; Zhiming Sun
• Keywords: Degradation; Visible spectrum

The MnFe2O4/g-C3N4/diatomite composites (Mn/G/D) were prepared via a facile precipitation-calcination method in this study. Mn/G/D possessed higher specific surface area, lower electron-hole pairs' recombination rate, as well wider and stronger visible light absorption capacity. Since the synergistic effect between g-C3N4 MnFe2O4, photogenerated electron could transfer from to which promote migration of electrons enhance photocatalytic activity peroxymonosulfate (PMS) activation efficiency. Mn/G/D-5% composite displayed excellent degradation performance bisphenol A (BPA) with removal efficiency 99.9% under PMS/Vis system, was approximately 2.47 63.8 times high that Mn/G/D-5%/PMS Mn/G/D-5%/Vis respectively. Moreover, negative electricity derived diatomite also promoted carriers' migration, rate constant around 2.4 than MnFe2O4/g-C3N4 (Mn/G). In addition, quenching experiments showed both radical pathway (h+, ·OH, ·O2− SO4·−) non-radical (1O2) responsible for BPA.