Coupling effects between metal–organic framework derivatives and oxygen-deficient TiO2 nanotubes: identified charge-transfer processes and photoelectric synergistic effect

Honglin Zhang; Meiying Jia; Jing Tong; Haihao Peng; Yinping Xiang; Zhaomeng Chen; Zhengyong Xu; Zhaohui Yang; Weiping Xiong

doi:10.1039/D3EN00223C

Coupling effects between metal–organic framework derivatives and oxygen-deficient TiO₂ nanotubes: identified charge-transfer processes and photoelectric synergistic effect†

Honglin Zhang,‡^a Meiying Jia,‡^b Jing Tong,‡^a Haihao Peng,^a Yinping Xiang,^a Zhaomeng Chen,^c Zhengyong Xu,^d Zhaohui Yang^a and Weiping Xiong

*^ac

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* Corresponding authors

^a College of Environmental Science and Engineering, Hunan University, Changsha 410082, P.R. China
E-mail: xiongweiping@hnu.edu.cn
Fax: +86 0731 8882 2829
Tel: +86 0731 8882 2829

^b College of Environmental Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, P.R. China

^c Hunan Boke Environmental Engineering Co. Ltd, Hengyang 421099, P.R. China

^d Hunan Modern Environmental Technology Co. Ltd, Changsha 410004, P.R. China

Abstract

The in situ self-assembling of metal–organic frameworks (MOFs) to construct thin-film electrodes is a major challenge in designing efficient photoelectric catalysts. In this study, we propose a method for preparing MOF derivative and TiO₂ nanotube (TNT) coupled catalysts with S-scheme Ar–ZrO₂/Ti₂O₃-TNTs, where Ar–ZrO₂ derived from NH₂-UiO-66 was modified in situ inside Ti₂O₃-TNTs. The TiO₂ nanotubes not only played an important role in substrate loading and support but also served as the source of Ti³⁺ for the self-modifying. Such a photoelectrocatalysis (PEC) system exhibited more than 95% degradation for the treatment of tetracycline wastewater with excellent photoelectric synergy by visible light (λ > 420 nm) and auxiliary circuitry owing to its excellent electrical conductivity, S-type heterogeneous structure, better photogenerated e⁻/h⁺ separation, and fast photocarrier transfer. Even in complicated water conditions, the photoelectrode generated ¹O₂, ˙O₂⁻, and h⁺ were shown to be the most significant active species for directly promoting the PEC oxidation of tetracycline. This research enriches the knowledge on the development and modification of materials using MOF derivatives to generate photoelectric anodes for treating antibiotics wastewater.

This article is part of the themed collection: Environmental Science: Nano Recent HOT Articles

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DOI: https://doi.org/10.1039/D3EN00223C
Article type: Paper
Submitted: 08 Apr 2023
Accepted: 17 Jun 2023
First published: 30 Jun 2023

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Environ. Sci.: Nano, 2023,10, 1993-2009

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Coupling effects between metal–organic framework derivatives and oxygen-deficient TiO₂ nanotubes: identified charge-transfer processes and photoelectric synergistic effect

H. Zhang, M. Jia, J. Tong, H. Peng, Y. Xiang, Z. Chen, Z. Xu, Z. Yang and W. Xiong, Environ. Sci.: Nano, 2023, 10, 1993 DOI: 10.1039/D3EN00223C

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Environmental Science: Nano