MgFeTi-LDH/g-C3N4 composites promote sodium persulfate activation through Fe3+/Fe2+ cycles for efficient tetracycline degradation under visible light irradiation

文献类型： 外文期刊

第一作者： Wei, Zihan

作者： Wei, Zihan;Mei, Tianhong;Xiang, Rongcheng;Wei, Wugan;Yang, Xiaorui;Fang, Yan;Zhu, Jianliang;Liang, Jinhua;Ren, Xiaoqian;Xu, Wenlong

作者机构：

期刊名称：NEW JOURNAL OF CHEMISTRY （ 影响因子：2.5； 五年影响因子：2.7 ）

ISSN： 1144-0546

年卷期： 2025 年 49 卷 22 期

页码：

收录情况： SCI

摘要： In this study, various MgFeTi-LDH/g-C3N4 photocatalytic materials were successfully synthesized through self-assembly, and their physicochemical and photoelectric properties were thoroughly characterized. Optical performance characterization of band gaps and VB-XPS spectra revealed that the EVB and ECB alignments of MgFeTi(3 : 1)-LDH/g-C3N4 composites are consistent with the fundamental characteristics of S-type heterojunctions. MgFeTi(3 : 1)-LDH/g-C3N4 coupled with sodium persulfate activation for TCH degradation achieved nearly 100% removal efficiency under visible light, surpassing previously reported catalysts. Moreover, five repeated tests of MgFeTi(3 : 1)-LDH/g-C3N4 showed negligible change in the removal rate of TCH, indicating its potential value for industrial applications. Furthermore, the catalytic degradation pathway and mechanism for MgFeTi(3 : 1)-LDH/g-C3N4 have been elucidated through LC-MS analysis, radical capture, and characterization. In addition, the high efficiency of TCH degradation is attributed to the synergy of Fe3+, Fe2+, SPS, and active species such as (OH)-O-center dot, SO4(center dot)-, and (center dot)O2-. Finally, the QSAR analysis and OD600 values suggest that the degradation pathway and time lead to a reduction in toxicity and the potential risk to the degradation liquid. This study offers a simple and economical approach to completely degrade TCH, also providing practical application prospects in wastewater treatment.

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