Double heterojunction CQDs/CeO2/BaFe12O19 magnetic separation photocatalysts: Construction, structural characterization, dye and POPs removal, and the interrelationships between magnetism and photocatalysis

• DOI: 10.1016/j.nucana.2022.100026
• Publication Date: 2022-08-24T06:00:19Z
• Authors: Shifa Wang; Xiangyu Chen; Leiming Fang; Huajing Gao; Mengjun Han; Xiping Chen; Yuanhua Xia; Lei Xie; Hua Yang
• Keywords: Methyl orange; Rhodamine B; Magnetic separation

This novel double heterojunction carbon quantum dots (CQDs)/CeO2/BaFe12O19 magnetic separation photocatalysts (CCBFOMSPs) were successfully prepared via a polyacrylamide gel method and low temperature sintering technology combined with hydrothermal method. The CQDs components in CCBFOMSPs identified by neutron powder diffraction, Raman spectroscopy X-ray photoelectron spectroscopy. charge carriers could transfer between the valence state (CeO2 BaFe12O19) facilely, inhibiting recombination of electron-hole pairs significantly Hall effect. photocatalytic activity for degradation mixed dyes include methyl orange (MO), rhodamine B (RhB) methylene blue (MB) tetrabromobisphenol A (TBBPA) remarkably improved regulating electromagnetic interaction BaFe12O19 contents photo-generated electrons. Capturing experiment showed that active species hole (hVB+), hydroxyl radical (•OH) superoxide (•O2−) played dominant roles degradation. Attractively, effect shed new light on wide applications photocatalysts.