Fe x O 4 -enhanced degradation of bisphenol A in visible light/peroxydisulfate system: production of singlet state oxygen

In this study, ferrous composites (Fe O ) were prepared by microreactor to activate peroxydisulfate (PDS) for the degradation of bisphenol A (BPA) with visible (Vis) light irradiation. X-ray diffraction (XRD), energy-dispersive spectrometry (EDS), X-ray photoelectron spectroscopy (XPS), and scanning...

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Published in:Environmental science and pollution research international 2023-05, Vol.30 (24), p.66303
Main Authors: Xu, Zhimin, Ju, Shaohua, Gao, Peng, Lin, Junjian, Niu, Yifan, Meng, Fei, Li, Shunling, Li, Fangfang, Du, Jiahao, Xu, Li, Peng, Hongbo, Pan, Bo
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Language:English
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Light
Oxygen
Phenols - chemistry
Singlet Oxygen
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container_issue 24
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container_title Environmental science and pollution research international
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creator Xu, Zhimin
Ju, Shaohua
Gao, Peng
Lin, Junjian
Niu, Yifan
Meng, Fei
Li, Shunling
Li, Fangfang
Du, Jiahao
Xu, Li
Peng, Hongbo
Pan, Bo
description In this study, ferrous composites (Fe O ) were prepared by microreactor to activate peroxydisulfate (PDS) for the degradation of bisphenol A (BPA) with visible (Vis) light irradiation. X-ray diffraction (XRD), energy-dispersive spectrometry (EDS), X-ray photoelectron spectroscopy (XPS), and scanning electron microscope (SEM) were used to characterize the morphology and crystal phase of Fe O . Photoluminescence (PL) spectroscopy combined with amperometric tests were used to determine the role of PDS on the performance of photocatalytic reaction. The main reactive species and intermediates for BPA removal were determined by electron paramagnetic resonance (EPR) measurement and quenching experiments. The result indicated that singlet state oxygen ( O ) contributed more to the BPA degradation than that of other reactive radicals (·OH, SO and ·O ); these reactive radicals and O formed by the reaction between photo-generated electrons (e ) and holes (h ) of Fe O and PDS. During this process, the consumption of e and h also improved their separation efficiency and thus enhanced the degradation of BPA. In addition, the photocatalytic activity of Fe O in Vis/Fe O /PDS system was 3.2-fold and 6.6-fold higher than that of single Fe O and PDS under Vis light, respectively. The Fe /Fe cycle could effectively drive the photocatalytic activation of PDS through indirect electron transfer and the formation of reactive radicals. This work illustrated that the degradation of BPA was rapidly in Vis/Fe O /PDS system mainly through O , which further improve our understanding on the efficient removal of organic contaminants in the environment.
doi_str_mv 10.1007/s11356-023-27141-8
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subjects Light
Oxygen
Phenols - chemistry
Singlet Oxygen
title Fe x O 4 -enhanced degradation of bisphenol A in visible light/peroxydisulfate system: production of singlet state oxygen
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