Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

MOF-Derived Spindle-Shaped Z-Scheme ZnO/ZnFe2O4 Heterojunction: A Magnetic Recovery Photocatalyst for Efficient Tetracycline Hydrochloride Degradation

Shilong Suo
,
Wenmei Ma
,
Pengfei Fang
* ORCID logo ,
Siyi Zhang
,
Ziwu Han
,
Yumin Wang
,
Yuanyuan Li
,
Yi Xiong
ORCID logo ,
Yong Liu
,
Chunqing He
ORCID logo
Version 1 : Received: 18 September 2023 / Approved: 19 September 2023 / Online: 22 September 2023 (13:39:00 CEST)

A peer-reviewed article of this Preprint also exists.

Suo, S.; Ma, W.; Zhang, S.; Han, Z.; Wang, Y.; Li, Y.; Xiong, Y.; Liu, Y.; He, C.; Fang, P. MOF-Derived Spindle-Shaped Z-Scheme ZnO/ZnFe2O4 Heterojunction: A Magnetic Recovery Catalyst for Efficient Photothermal Degradation of Tetracycline Hydrochloride. Materials 2023, 16, 6639. Suo, S.; Ma, W.; Zhang, S.; Han, Z.; Wang, Y.; Li, Y.; Xiong, Y.; Liu, Y.; He, C.; Fang, P. MOF-Derived Spindle-Shaped Z-Scheme ZnO/ZnFe2O4 Heterojunction: A Magnetic Recovery Catalyst for Efficient Photothermal Degradation of Tetracycline Hydrochloride. Materials 2023, 16, 6639.

Abstract

The development of photocatalysts with a wide spectral response and effective carrier separation capability is essential for the green degradation of tetracycline. In this work, a magnetic recyclable Z-scheme ZnO/ZnFe2O4 heterojunction (ZZF) was successfully constructed by the solid phase method using MIL-88A(Fe)@Zn as the precursor. Appropriate band gap width and Z-scheme charge transfer mechanism make ZZF have excellent visible light absorption performance, efficient charge separation and strong redox ability. Under visible light irradiation, the degradation efficiency of TCH for optimal sample ZZF2 can reach 86.3 % within 75 min in deionized water, and achieve 92.9 % within 60 min in tap water, which exhibits superior stability and reusability after five cycles. Moreover, the catalyst in the water can be conveniently recovered by magnetic force. After visible light irradiation for 70 minutes, the temperature of the reaction system increased by 21.9 °C. Its degradation constant (35.53×10-3 min-1) increases 5.1 times that at room temperature (6.95×10-3 min-1). Thermal energy perfects the kinetic driving force of the reactants and promotes carrier migration to produce more •O2- and •OH. This work provides a potential candidate and inspires the design of photocatalyst for tetracycline hydrochloride degradation.

Keywords

Z-scheme; Tetracycline; Photocatalysis; ZnFe2O4; ZnO

Subject

Chemistry and Materials Science, Materials Science and Technology

Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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