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A new catalyst derived from the sulfur-doped metal-organic framework for Fenton-like reaction
- Source :
- Process Safety and Environmental Protection; November 2024, Vol. 191 Issue: 1 p1659-1671, 13p
- Publication Year :
- 2024
-
Abstract
- Fenton-like reaction exhibits considerable advantages in the remediation of pollutants. To fabricate an efficient catalyst becomes an issue concerning the performance enhancement in Fenton-like reaction. Herein, S-Fe-MOF-400 which was derived from a sulfur-doped metal-organic framework (Fe-MOF), was newly prepared and exhibited high ability for H2O2activation during Fenton-like reaction. The results showed that the sulfurization effectively reduced the charge transfer resistance (Rct) of S-Fe-MOF-400, and facilitated the charge transfer, consequently enhancing the catalytic performance of S-Fe-MOF-400 in the Fenton-like reaction. XRD analysis revealed that FeS2was the predominant reactive component in S-Fe-MOF-400 with a regular cubic structure and pronounced crystallinity. Additionally, the presence of low-valent sulfur ensured the availability of Fe (II), thereby facilitating the occurrence of the Fenton reaction. Under optimal conditions, the removal efficiency of pollutants reached 86.7 % within 60 min, resulting in total organic carbon (TOC) removal efficiency at 40.6 %. Quenching experiments and electron paramagnetic resonance (EPR) detections revealed that •OH, 1O2, and O2•−synergistically participated in the Fenton-like reaction,with •OH being the primary active species. The activation process of H2O2induced by S-Fe-MOF-400 mainly yielded hydroxyl radicals and superoxide radicals. The 1O2was generated through two following pathways: (i) the transformation of superoxide and hydroxyl radicals, and (ii) the conversion of natural oxygen molecules (O2). This current study illustrated the significant potential for the application of sulfur-modified Fe-MOF in the Fenton-like reaction for pollutant removal.
Details
- Language :
- English
- ISSN :
- 09575820 and 17443598
- Volume :
- 191
- Issue :
- 1
- Database :
- Supplemental Index
- Journal :
- Process Safety and Environmental Protection
- Publication Type :
- Periodical
- Accession number :
- ejs67452046
- Full Text :
- https://doi.org/10.1016/j.psep.2024.09.082