Ultrasound-assisted synthesized BiFeO3 as FeOH+ promoted peroxymonosulfate activator for highly efficient degradation of tetracycline

A multiferroic BiFeO3 (BFO) catalyst was fabricated through a mild one-pot hydrothermal process with a bath-ultrasound assisted dissolution of Fe(NO3)3·9H2O for 30 min. X-ray photoemission spectroscopy revealed that the BFO (BFO-u) catalyst with US assisted dissolution of Fe(NO3)3·9H2O in the synthe...

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Bibliographic Details
Published in:Journal of alloys and compounds 2021-02, Vol.854, p.157281, Article 157281
Main Authors: Xing, Hongjie, Gao, Shitao, Zhang, Jingji, Xu, Yu, Du, Huiwei, Zhu, Zejie, Wang, Jiangying, Yao, Yaxuan, Zhang, Suwei, Ren, Lingling
Format: Article
Language:English
Subjects:
Antibiotics
Bismuth ferrite
Catalysts
Degradation
Dissolution
Multiferroics
Peroxymonosulfate activation
Photoelectric emission
Ultrasonic imaging
Ultrasound
Ultrasound-assisted synthesis
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Summary:A multiferroic BiFeO3 (BFO) catalyst was fabricated through a mild one-pot hydrothermal process with a bath-ultrasound assisted dissolution of Fe(NO3)3·9H2O for 30 min. X-ray photoemission spectroscopy revealed that the BFO (BFO-u) catalyst with US assisted dissolution of Fe(NO3)3·9H2O in the synthetic process exhibited high Fe2+ and OH− levels, which could be explained to be Fe3+ + H2O →))) Fe2+ + H+ + •OH. As a result, BFO-u catalyst activated potassium peroxymonosulfate (PMS) efficiently for degrading tetracycline hydrochloride. In particular, visible-light assisted activation of PMS over BFO-u catalyst exhibited the highest degradation rate constant, at 0.352 min−1. Species-trapping experiments revealed that the presence of PMS promoted the generation of •OH, •O2− and 1O2 that all participated in degrading TCH, in which 1O2 was primarily contributed to the degradation. Also, BFO-u catalyst was stable and recyclable and thus suitable for practical applications. [Display omitted] •BFO was synthesized via a facile one-pot ultrasound-assisted hydrothermal process.•Higher FeOH+ level in BFO-u catalyst promoted peroxymonosulfate activation.•BFO-u/PMS/VL system exhibited a highest degradation rate constant of 0.352 min−1.•1O2 was primarily contributed to the TCH degradation process.•BFO-u catalyst was efficient, stable and recyclable for degrading refractory TCH.
ISSN:0925-8388
1873-4669
DOI:10.1016/j.jallcom.2020.157281