Controllable synthesis of copper-organic frameworks via ligand adjustment for enhanced photo-Fenton-like catalysis

Wen-Long Duan; Ye-Xia Li; Feng-Yan; Wen-Ze Li; Jian Luan

doi:10.1016/j.jcis.2023.05.021

Controllable synthesis of copper-organic frameworks via ligand adjustment for enhanced photo-Fenton-like catalysis

J Colloid Interface Sci. 2023 Sep 15:646:107-117. doi: 10.1016/j.jcis.2023.05.021. Epub 2023 May 9.

Authors

Wen-Long Duan¹, Ye-Xia Li², Feng-Yan³, Wen-Ze Li³, Jian Luan⁴

Affiliations

¹ College of Science, Shenyang University of Chemical Technology, Shenyang 110142, PR China. Electronic address: wlduan@syuct.edu.cn.
² College of Chemistry, Liaoning University, Shenyang 110036, PR China. Electronic address: yxliedu@sina.com.
³ College of Science, Shenyang University of Chemical Technology, Shenyang 110142, PR China.
⁴ College of Sciences, Northeastern University, Shenyang 100819, PR China. Electronic address: 2010044@stu.neu.edu.cn.

PMID: 37187044
DOI: 10.1016/j.jcis.2023.05.021

Abstract

The efficient heterogeneous photo-Fenton-like catalysts based on two secondary ligand-induced Cu(II) metal-organic frameworks (Cu-MOF-1 and Cu-MOF-2) were constructed for the first time and investigated for the degradation of multiple antibiotics. Herein, two novel Cu-MOFs were prepared using mixed ligands by a facile hydrothermal method. The one-dimensional (1D) nanotube-like structure could be obtained by using V-shaped, long and rigid 4,4'-bis(3-pyridylformamide)diphenylether (3-padpe) ligand in Cu-MOF-1, while polynuclear Cu cluster could be prepared more easily by using short and small isonicotinic acid (HIA) ligand in Cu-MOF-2. Their photocatalytic performances were measured by degradation of multiple antibiotics in Fenton-like system. Comparatively, Cu-MOF-2 exhibited superior photo-Fenton-like performance under visible light irradiation. The outstanding catalytic performance of Cu-MOF-2 was ascribed to the tetranuclear Cu cluster configuration and excellent ability of photoinduced charge transfer and hole separation thus improved the photo-Fenton activity. In addition, Cu-MOF-2 showed high photo-Fenton activity in wide pH working range 3-10 and maintained wonderful stability after five cyclic experiments. The degradation intermediates and pathways were deeply studied. The main active species h⁺, O₂^- and OH worked together in photo-Fenton-like system and possible degradation mechanism was proposed. This study provided a new approach to design the Cu-based MOFs Fenton-like catalysts.

Keywords: Antibiotics degradation; Cu-based MOF; Photo-Fenton-like catalyst; Secondary ligand; Visible light.