Separation and Purification Technology, volume 268, pages 118691

In situ fabrication of a novel S-scheme heterojunction photocatalyts Bi2O3/P-C3N4 to enhance levofloxacin removal from water

Xinfei Zhang 1
Yuan Zhang 2
Xiaobo Jia 3
Nan Zhang 1
Rui Xia 3
Xiaojiao Zhang 3
Ziwei Wang 3
Mingqiao Yu 3
Publication typeJournal Article
Publication date2021-08-01
Quartile SCImago
Q1
Quartile WOS
Q1
Impact factor8.6
ISSN13835866, 18733794
Analytical Chemistry
Filtration and Separation
Abstract
• A novel S-scheme heterojunction Bi 2 O 3 /P-C 3 N 4 material. • Removal of 89.2% of the levofloxacin in water within 75 min under simulated sunlight. • The improvement of the Bi 2 O 3 /P-C 3 N 4 photocatalytic effect mechanism was proved. • Possible intermediate products and pathways for levofloxacin degradation were proposed. The removal of antibiotics from water by S-scheme heterojunction photocatalytic materials has become a research hotspot in recent years. Herein, an S -scheme heterojunction Bi 2 O 3 /P-C 3 N 4 composite photocatalytic material was prepared via in situ thermal polymerization and the degradation effect and internal mechanism of levofloxacin (LVFX) were explored under simulated sunlight. The results show that the Bi 2 O 3 /P-C 3 N 4 composite photocatalytic material can remove 89.2% of the LVFX in water within 75 min under simulated sunlight, which is greatly improved compared to the original Bi 2 O 3 and P-C 3 N 4 . The degradation effect is improved because the constructed S-scheme system helps spatially separate the electrons with higher reducing abilities generated by P-C 3 N 4 and the holes with higher oxidizing ability generated by Bi 2 O 3 ; moreover, BET specific surface area and the hydrophilicity is improved. Further through radicals capture, electron spin resonance (ESR), the density functional theory (DFT) experiments verified the mechanism of S-scheme heterojunction degradation of LVFX and revealed that holes and superoxide free radicals are the main active substances in the degradation of LVFX. Finally, liquid chromatography–tandem mass spectrometry (LC–MS) was used to determine the intermediate products in the degradation path, and the LVFX degradation pathway was proposed. This study provides a new insight into the degradation of LVFX and provides support for antibiotic removal of photocatalytic materials in real water environments.

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Zhang X. et al. In situ fabrication of a novel S-scheme heterojunction photocatalyts Bi2O3/P-C3N4 to enhance levofloxacin removal from water // Separation and Purification Technology. 2021. Vol. 268. p. 118691.
GOST all authors (up to 50) Copy
Zhang X., Zhang Y., Jia X., Zhang N., Xia R., Zhang X., Wang Z., Yu M. In situ fabrication of a novel S-scheme heterojunction photocatalyts Bi2O3/P-C3N4 to enhance levofloxacin removal from water // Separation and Purification Technology. 2021. Vol. 268. p. 118691.
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RIS Copy
TY - JOUR
DO - 10.1016/j.seppur.2021.118691
UR - https://doi.org/10.1016/j.seppur.2021.118691
TI - In situ fabrication of a novel S-scheme heterojunction photocatalyts Bi2O3/P-C3N4 to enhance levofloxacin removal from water
T2 - Separation and Purification Technology
AU - Zhang, Xinfei
AU - Zhang, Yuan
AU - Jia, Xiaobo
AU - Zhang, Nan
AU - Xia, Rui
AU - Zhang, Xiaojiao
AU - Wang, Ziwei
AU - Yu, Mingqiao
PY - 2021
DA - 2021/08/01 00:00:00
PB - Elsevier
SP - 118691
VL - 268
SN - 1383-5866
SN - 1873-3794
ER -
BibTex
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BibTex Copy
@article{2021_Zhang,
author = {Xinfei Zhang and Yuan Zhang and Xiaobo Jia and Nan Zhang and Rui Xia and Xiaojiao Zhang and Ziwei Wang and Mingqiao Yu},
title = {In situ fabrication of a novel S-scheme heterojunction photocatalyts Bi2O3/P-C3N4 to enhance levofloxacin removal from water},
journal = {Separation and Purification Technology},
year = {2021},
volume = {268},
publisher = {Elsevier},
month = {aug},
url = {https://doi.org/10.1016/j.seppur.2021.118691},
pages = {118691},
doi = {10.1016/j.seppur.2021.118691}
}
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