Ibuprofen degradation by a synergism of facet-controlled MIL-88B(Fe) and persulfate under simulated visible light

Ning Liu; Jinxing Wu; Fuhao Fei; Jianqiu Lei; Wenyan Shi; Guixiang Quan; Shuai Zeng; Xiaodong Zhang; Liang Tang

doi:10.1016/j.jcis.2021.12.142

Ibuprofen degradation by a synergism of facet-controlled MIL-88B(Fe) and persulfate under simulated visible light

J Colloid Interface Sci. 2022 Apr 15:612:1-12. doi: 10.1016/j.jcis.2021.12.142. Epub 2021 Dec 25.

Authors

Ning Liu¹, Jinxing Wu¹, Fuhao Fei¹, Jianqiu Lei², Wenyan Shi³, Guixiang Quan⁴, Shuai Zeng¹, Xiaodong Zhang⁵, Liang Tang⁶

Affiliations

¹ School of Environment and Architecture, University of Shanghai for Science and Technology, Shanghai 200093, PR China.
² Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, PR China.
³ School of Environmental and Chemical Engineering, Shanghai University, Shanghai 200444, PR China.
⁴ School of Environmental Science and Engineering, Yancheng Institute of Technology, Yancheng 224051, PR China.
⁵ School of Environment and Architecture, University of Shanghai for Science and Technology, Shanghai 200093, PR China. Electronic address: fatzhxd@126.com.
⁶ Key Laboratory of Organic Compound Pollution Control Engineering (MOE), Shanghai University, Shanghai 200444, PR China; School of Environmental and Chemical Engineering, Shanghai University, Shanghai 200444, PR China. Electronic address: tang1liang@shu.edu.cn.

PMID: 34974253
DOI: 10.1016/j.jcis.2021.12.142

Abstract

The photocatalysis/persulfate (PS) hybrid system has proven to be a promising method for degrading organic pollutants from aqueous solutions. In this study, three MIL-88B(Fe) iron-based metal-organic framework (MOF) phases with different facet content were prepared and used both as photocatalysts and catalysts for PS activation to remove ibuprofen (IBP). The results showed that there was a close correlation between the exposed facets and the catalytic activity. MIL-88B(Fe)-1 (M88B1) with exposed {100} facets and proportionally more {101} facets showed the best catalytic activity. The optimum PS dosage used in this study was 60 mg/L. The presence of Cl^-, SO₄^2-, and NO₃^- all inhibited the degradation of IBP. X-ray photoelectron spectroscopy (XPS) showed that M88B1 possessed more Fe²⁺ than the other two MIL-88B(Fe) MOF phases, making it easier to generate active radicals through PS activation. The UV-vis diffuse reflectance spectra (DRS), photoluminescence (PL), and electrochemical analysis indicated that M88B1 possessed the highest light absorption, most active sites, and fastest charge transfer ability. Radical scavenging and electron spin resonance (ESR) experiments demonstrated that SO₄^-•, ^•OH, O₂^-•, and ¹O₂ species participated in the IBP degradation process. Furthermore, density functional theory (DFT) calculations were performed to identify the crystallographic facets, band structure, and total density of states of MIL-88B(Fe) to further confirm the mechanism of MIL-88B(Fe) as a photocatalyst and a PS activator. This work provides new insights into the synergism between photocatalysis and persulfate activation by facet-controlled MOFs for environmental remediation.

Keywords: Crystallographic facet; Ibuprofen; MIL-88B(Fe); Persulfate activation; Photocatalysis.

MeSH terms

Catalysis
Ibuprofen*
Light
Metal-Organic Frameworks*

Substances

Ibuprofen
Metal-Organic Frameworks