Simultaneous Photocatalytic Tetracycline Oxidation and Cr(VI) Reduction by Z-Scheme Multiple Layer TiO2/SnIn4S8

Boyuan Ning; Zhixin Chen; Yanqing Cai; Fang-Xing Xiao; Pingfan Xu; Guangcan Xiao; Yunhui He; Linjian Zhan; Junyi Zhang

doi:10.1021/acs.langmuir.4c00549

Simultaneous Photocatalytic Tetracycline Oxidation and Cr(VI) Reduction by Z-Scheme Multiple Layer TiO₂/SnIn₄S₈

Langmuir. 2024 Apr 30;40(17):9144-9154. doi: 10.1021/acs.langmuir.4c00549. Epub 2024 Apr 17.

Authors

Boyuan Ning¹, Zhixin Chen^{1

2}, Yanqing Cai¹, Fang-Xing Xiao^{1

3}, Pingfan Xu¹, Guangcan Xiao^{1

2}, Yunhui He^{1

2}, Linjian Zhan¹, Junyi Zhang¹

Affiliations

¹ School of Advanced Manufacturing, Fuzhou University, Jinjiang 362200, P. R. China.
² Fujian College Association Instrumental Analysis Center, Fuzhou University, Fuzhou 350108, P. R. China.
³ College of Materials Science and Engineering, Fuzhou University, Fuzhou 350108, P. R. China.

PMID: 38629776
DOI: 10.1021/acs.langmuir.4c00549

Abstract

Wastewater pollutants are a major threat to natural resources, with antibiotics and heavy metals being common water contaminants. By harnessing clean, renewable solar energy, photocatalysis facilitates the synergistic removal of heavy metals and antibiotics. In this paper, MXene was both a template and raw material, and MXene-derived oxide (TiO₂) and SnIn₄S₈ Z-scheme composite materials were synthesized and characterized. The synergistic mode of photocatalytic reduction and oxidation leads to the enhanced utilization of e^-/h⁺ pairs. The TiO₂/SnIn₄S₈ exhibited a higher photocatalytic capacity for the simultaneous removal of tetracycline (TC) (20 mg·L^-1) and Cr(VI) (15 mg·L^-1). The main active substances of TC degradation and Cr(VI) reduction were identified via free radical scavengers and electron paramagnetic resonance (EPR). Additionally, the potential photocatalytic degradation route of TC was thoroughly elucidated through liquid chromatography-mass spectrometry (LC-MS).