Z-scheme Bi4O5Br2/NH2-MIL-125(Ti)heterojunctions enable exceptional visible photocatalytic degradation of organic pollutant

Feng Huang ¹Muhammad Humayun ²Gang Li ³Ting-Ting Fan ¹Wen-Lin Wang ¹Yu-Lin Cao ⁴Anton Nikiforov ⁵Chun-Dong Wang ⁶Jing Wang¹

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作者信息

1. Key Laboratory of Analytical Science and Technology of Hebei Province,Key Laboratory of Medicinal Chemistry and Molecular Diagnosis of the Ministry of Education,State Key Laboratory of New Pharmaceutical Preparations and Excipients,College of Chemistry and Materials Science,Hebei University,Baoding 071002,China
2. Energy,Water and Environment Lab,College of Humanities and Sciences,Prince Sultan University,11586 Riyadh,Saudi Arabia
3. Baoding Green Yijia Environmental Protection Technology Ltd,Baoding 071051,China
4. Physics Laboratory,Industrial Training Center,Shenzhen Polytechnic University,Shenzhen 518055,China
5. Department of Applied Physics,Ghent University,9000 Ghent,Belgium
6. Energy,Water and Environment Lab,College of Humanities and Sciences,Prince Sultan University,11586 Riyadh,Saudi Arabia;School of Integrated Circuits,Wuhan National Laboratory for Optoelectronics,Huazhong University of Science and Technology,Wuhan 430074,China
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Abstract

One key strategy to enhance photocatalytic performance is to improve the transfer and separation efficiency of photogenerated carriers by building optimized heterojunctions.Herein,novel Bi4O5Br2/NH2-MIL-125(Ti)Z-scheme heterojunctions are fabricated and used as photocatalysts for organic pollutant photodegradation.The NH2-MIL-125(Ti)nanosheets are exfoliated via a self-de-veloped alkali solution stripping approach and then uni-formly decorated on Bi4O5Br2.The as-prepared Bi4O5Br2/NH2-MIL-125(Ti)presents more than 90％degradation of various pollutants,outperforming the counterpart individ-ual ones.The various characterization results suggest that the enhanced degradation rate is due to the more intimate face-to-face interfacial contact of the lamellar Z-scheme heterojunction materials,in which the migration path of carriers from the material's interior to the surface can be reduced,in turn enhancing migration efficiency and separation capability significantly.A possible photocat-alytic reaction mechanism is proposed based on the pho-toelectric behaviors,radical trapping experiments and liquid chromatography mass spectrometry analysis.This work promotes the development of new photocatalytic materials for heterojunctions with face-to-face interfacial contacts,as well as the effective purification of wastewater in environmental remediation.

Key words

Z-scheme heterojunctions/Photocatalysis/Alkaline solution stripping/Bi4O5Br2/NH2-MIL-125(Ti)

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基金项目

National Natural Science Foundation of China(51302061)

Natural Science Foundation of Hebei province(E2014201076)

Natural Science Foundation of Hebei province(E2020201021)

Natural Science Foundation of Hebei province(E2023201019)

Research Innovation Team of College of Chemistry and Environmental Science of Hebei University(hxkytd2102)

Shenzhen Science and Technology Innovation Committee(JCYJ20200109141412308)

Bintuan Science and Technology Program(2020DB002)

Bintuan Science and Technology Program(2022DB009)

出版年

2024

稀有金属(英文版)

中国有色金属学会

稀有金属(英文版)

CSTPCDCSCDEI

影响因子：0.801

ISSN：1001-0521

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