Photocatalytic Degradation of Organic Pollutants by Sulfate Radicals Activated by Defective NH2-MIL-88B DOI

Zeping Qin,

Mingming Sun,

Runjie Wu

et al.

Langmuir, Journal Year: 2025, Volume and Issue: unknown

Published: May 8, 2025

Photocatalysis has been recognized as a viable technology for pollutant degradation in wastewater, owing to its ability generate reactive radicals under photoirradiation. Among these, sulfate (SO4·-) have attracting significant attention due their strong oxidizing properties; yet the specific mechanism of action remained elusive thus far. In this study, defective NH2-MIL-88B (DNMB) is prepared via facile hydrothermal procedure presence potassium sodium tartrate and found facilitate production from anions visible light irradiation, partial reduction Fe3+ Fe2+ NMB skeleton by added that enriches Fe3+/Fe2+ redox couples, addition other species like superoxide hydroxy radicals. This effectively improves efficiency toward variety organic pollutants, including antibiotics such tetracycline (TC), sulfamethoxazole (SMX), levofloxacin (LEV), well common contaminants bisphenol A (BPA) rhodamine B (RhB), compared pristine NMB. Specifically, after 40 minutes rate increases 61.5% 92.1% TC, 76.1% 89.4% SMX, 60.5% 75.2% LEV, 61.7% 91.2% BPA, 78.4% 94.8% RhB. The primary active are identified be radicals, with minor contributions holes, hydroxyl demonstrated quenching experiments electron spin resonance measurements, further confirmed theoretical studies. Degradation pathways various pollutants then proposed based on results Fukui index calculations liquid chromatography-mass spectrometry analysis. These underscore crucial role structural engineering driving advancement green sustainable technologies environmental engineering.

Language: Английский

Photocatalytic Degradation of Organic Pollutants by Sulfate Radicals Activated by Defective NH2-MIL-88B DOI

Zeping Qin,

Mingming Sun,

Runjie Wu

et al.

Langmuir, Journal Year: 2025, Volume and Issue: unknown

Published: May 8, 2025

Photocatalysis has been recognized as a viable technology for pollutant degradation in wastewater, owing to its ability generate reactive radicals under photoirradiation. Among these, sulfate (SO4·-) have attracting significant attention due their strong oxidizing properties; yet the specific mechanism of action remained elusive thus far. In this study, defective NH2-MIL-88B (DNMB) is prepared via facile hydrothermal procedure presence potassium sodium tartrate and found facilitate production from anions visible light irradiation, partial reduction Fe3+ Fe2+ NMB skeleton by added that enriches Fe3+/Fe2+ redox couples, addition other species like superoxide hydroxy radicals. This effectively improves efficiency toward variety organic pollutants, including antibiotics such tetracycline (TC), sulfamethoxazole (SMX), levofloxacin (LEV), well common contaminants bisphenol A (BPA) rhodamine B (RhB), compared pristine NMB. Specifically, after 40 minutes rate increases 61.5% 92.1% TC, 76.1% 89.4% SMX, 60.5% 75.2% LEV, 61.7% 91.2% BPA, 78.4% 94.8% RhB. The primary active are identified be radicals, with minor contributions holes, hydroxyl demonstrated quenching experiments electron spin resonance measurements, further confirmed theoretical studies. Degradation pathways various pollutants then proposed based on results Fukui index calculations liquid chromatography-mass spectrometry analysis. These underscore crucial role structural engineering driving advancement green sustainable technologies environmental engineering.

Language: Английский

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