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In situ growth of g-C3N4/MIL-101(Fe) on iron mesh to activate persulfate for enhanced removal of methyl orange: mechanism and pathway.
- Source :
- New Journal of Chemistry; 7/7/2024, Vol. 48 Issue 25, p11447-11456, 10p
- Publication Year :
- 2024
-
Abstract
- Organic contamination of water results in significant risks to the biosphere and human health. The treatment of organic pollutants found in effluents urgently requires a green, sustainable, and effective approach. Herein, a straightforward one-step procedure was developed to create a photocatalytic mesh using iron mesh as the substrate and the g-C<subscript>3</subscript>N<subscript>4</subscript>/MIL-101(Fe) heterostructure as the photocatalytic material to activate persulfate (PS) for the removal of methyl orange (MO) from water. Fluorescence stereo microscopy (FSM), scanning electron microscopy (SEM), nitrogen adsorption–desorption, X-ray photoelectron spectroscopy (XPS), Fourier transform infrared (FT-IR) spectroscopy, and X-ray powder diffraction (XRD) were used to characterize the morphological and physicochemical properties of the synthesized composites, which confirmed the successful growth of g-C<subscript>3</subscript>N<subscript>4</subscript>/MIL-101(Fe) on the iron mesh. The outstanding PS activation capacity of g-C<subscript>3</subscript>N<subscript>4</subscript>/MIL-101(Fe) promoted electron transfer and accelerated the generation of SO<subscript>4</subscript>˙<superscript>−</superscript>, resulting in up to 91.05% MO degradation under 60 min of visible light exposure. The removal mechanisms were investigated by quenching experiments and electron spin resonance (ESR), which proved that ˙OH, ˙O<subscript>2</subscript><superscript>−</superscript> and h<superscript>+</superscript> contributed to the removal of MO. Moreover, the degradation pathways of MO and the as-formed intermediates were identified by high-resolution mass spectroscopy (HRMS). This study provides a convenient and economical method to build innovative photocatalytic systems for organic pollutant degradation. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 11440546
- Volume :
- 48
- Issue :
- 25
- Database :
- Complementary Index
- Journal :
- New Journal of Chemistry
- Publication Type :
- Academic Journal
- Accession number :
- 178052266
- Full Text :
- https://doi.org/10.1039/d4nj01876a