期刊
CHINESE JOURNAL OF CATALYSIS
卷 43, 期 10, 页码 2652-2664出版社
ELSEVIER
DOI: 10.1016/S1872-2067(22)64106-8
关键词
TaON/Bi2WO6; S-Scheme heterojunction; Electrospinning; Oxygen vacancy; Antibiotic degradation; Cr(VI) reduction
资金
- Natural Science Foundation of Zhejiang Province [LY20E080014]
- Science and Technology Project of Zhoushan [2022C41011, 2020C21009]
- National Natural Science Foundation of China [51708504]
In this study, a novel TaON/Bi2WO6 S-scheme heterojunction nanofibers were developed, showing exceptional visible-light photocatalytic performance for pollutant degradation with satisfactory stability. The research provides guidance for designing high-performance photocatalysts with defects for environmental protection.
Enlightened by natural photosynthesis, developing efficient S-scheme heterojunction photocatalysts for deleterious pollutant removal is of prime importance to restore environment. Herein, novel TaON/Bi2WO6 S-scheme heterojunction nanofibers were designed and developed by in-situ growing Bi2WO6 nanosheets with oxygen vacancies (OVs) on TaON nanofibers. Thanks to the efficiently spatial charge disassociation and preserved great redox power by the unique S-scheme mechanism and OVs, as well as firmly interfacial contact by the core-shell 1D/2D fibrous hetero-structure via the in-situ growth, the optimized TaON/Bi2WO6 heterojunction unveils exceptional visible-light photocatalytic property for abatement of tetracycline (TC), levofloxacin (LEV), and Cr(VI), respectively by 2.8-fold, 1.0-fold, and 1.9-fold enhancement compared to the bare Bi2WO6, while maintaining satisfactory stability. Furthermore, the systematic photoreaction tests indicate TaON/Bi2WO6 has the high practicality in the elimination of pollutants in aquatic environment. The degradation pathway of tetracycline and intermediate eco-toxicity were determined based on HPLC-MS combined with QSAR calculation, and a possible photocatalytic mechanism was elucidated. This work provides a guideline for designing high-performance TaON-based S-scheme photocatalysts with defects for environment protection. (C) 2022, Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Published by Elsevier B.V. All rights reserved.
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