Bisthiourea immobilized UiO-66-NH2 supported Fe2O3 nanoparticles to accelerate dual centers Fenton-like reaction

Xu Huang; Xiaohu Fan; Aimin Li; Yechao Tian; Dawei Li

doi:10.1016/j.scitotenv.2023.162651

Bisthiourea immobilized UiO-66-NH₂ supported Fe₂O₃ nanoparticles to accelerate dual centers Fenton-like reaction

Sci Total Environ. 2023 Jun 1:875:162651. doi: 10.1016/j.scitotenv.2023.162651. Epub 2023 Mar 8.

Authors

Xu Huang¹, Xiaohu Fan², Aimin Li¹, Yechao Tian¹, Dawei Li³

Affiliations

¹ State Key Laboratory of Pollution Control and Resource Reuse, School of Environment, Nanjing University, Nanjing 210023, China.
² School of Water Conservancy and Civil Engineering, Northeast Agricultural University, Harbin, Heilongjiang 150030, China.
³ School of Environmental Science and Engineering, Nanjing University of Information Science & Technology, Nanjing 210044, China. Electronic address: daweili@nuist.edu.cn.

PMID: 36894082
DOI: 10.1016/j.scitotenv.2023.162651

Abstract

In this paper, an efficient catalyst UiO-66-BTU/Fe₂O₃ was synthesized by using bisthiourea modified zirconium-based metal organic framework (Zr-MOF). The UiO-66-BTU/Fe₂O₃ system features outstanding Fenton-like activity that is 22.84 times and 12.91 times larger than Fe₂O₃ and conventional UiO-66-NH₂/Fe₂O₃ system. It also exhibits good stability, broad pH range and recycle ability. Through comprehensive mechanistic investigations, we have ascribed the excellent catalytic performance of the UiO-66-BTU/Fe₂O₃ system to ¹O₂ and HO as the reactive intermediates, cause Zr centers can make complexation with Fe to form dual centers. Meanwhile, the CS on the bisthiourea can form Fe-S-C bonds with Fe₂O₃, reducing the redox potential of Fe(III)/Fe(II) and influencing the decomposing of H₂O₂, which indirectly regulate the interaction between Fe and Zr to accelerate electron transfer during the reaction. This work exhibits the design and understanding of the iron oxides incorporated in modified MOFs with excellent Fenton-like catalytic performance to remove phenoxy acid herbicides.

Keywords: Bisthiourea; Dual reaction centers; Electron transfer; UiO-66-BTU/Fe(2)O(3).