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Enhanced photoelectrocatalytic degradation of bisphenol a by BiVO4 photoanode coupling with peroxymonosulfate
Shao, Huixin; Wang, Yanbin; Zeng, Huabin; Zhang, Juanjuan; Wang, Yan; Sillanpaa, Mika; Zhao, Xu
2020-07-15
Source PublicationJOURNAL OF HAZARDOUS MATERIALS
ISSN0304-3894
Volume394Pages:1-16
AbstractPeroxymonosulfate (PMS) was introduced into a photoelectrocatalytic (PEC) system with a bismuth vanadate (BiVO4) photoanode to enhance the PEC oxidation of bisphenol A (BPA). With the addition of 5 mM PMS, the degradation efficiency of 10 mg/L BPA was significantly improved from 24.2% to 100.0% within 120 min and the side reaction of O-2 evolution was avoided at a potential as low as 0.25 V. The electron spin resonance and radicals quenching results suggested that photogenerated holes instead of SO4 center dot- and (OH)-O-center dot were primarily responsible for the BPA degradation. To further explore the role of PMS, a photocatalytic fuel cell with the structure of BiVO4 (photoanode)vertical bar 10 mg/L BPA vertical bar proton exchange membrane (separator)vertical bar 5 mM PMS vertical bar Pt (cathode) was constructed and demonstrated that PMS played a key role as electrons acceptor instead of the precursor of SO4 center dot-. The PEC tests including open-circuit potential, linear sweep voltammetry and electrochemical impedance spectroscopy indicated that a more efficient separation of photogenerated charges was achieved in the PEC process with the help of PMS, thus generating more photogenerated holes for enhanced BPA degradation. This work may provide a novel way to enhance the separation of photogenerated charges at the photoanode.
Department中国科学院饮用水科学与技术重点实验室
KeywordPhotoelectrocatalysis Bismuth vanadate Peroxymonosulfate Charges separation Bisphenol A
Document Type期刊论文
Identifierhttp://ir.rcees.ac.cn/handle/311016/45289
Collection中国科学院饮用水科学与技术重点实验室
Recommended Citation
GB/T 7714
Shao, Huixin,Wang, Yanbin,Zeng, Huabin,et al. Enhanced photoelectrocatalytic degradation of bisphenol a by BiVO4 photoanode coupling with peroxymonosulfate[J]. JOURNAL OF HAZARDOUS MATERIALS,2020,394:1-16.
APA Shao, Huixin.,Wang, Yanbin.,Zeng, Huabin.,Zhang, Juanjuan.,Wang, Yan.,...&Zhao, Xu.(2020).Enhanced photoelectrocatalytic degradation of bisphenol a by BiVO4 photoanode coupling with peroxymonosulfate.JOURNAL OF HAZARDOUS MATERIALS,394,1-16.
MLA Shao, Huixin,et al."Enhanced photoelectrocatalytic degradation of bisphenol a by BiVO4 photoanode coupling with peroxymonosulfate".JOURNAL OF HAZARDOUS MATERIALS 394(2020):1-16.
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