Synthesis of Bismuth Niobate Nanoparticles Rich in Oxygen Vacancies and Efficient Degradation of Tetracycline Hydrochloride

Langmuir, Год журнала: 2025, Номер unknown

Опубликована: Апрель 7, 2025

With the increasing energy crisis and environmental pollution problems, development of solar-powered photocatalytic technologies for green efficient removal emerging pollutants from aquatic ecosystems has become an urgent need. Bismuth niobate (Bi3NbO7), as a bismuth-based photocatalyst, attracted much attention due to its unique electronic structure optical properties. However, Bi3NbO7 synthesized by traditional hydrothermal method suffers problems large size, limited active sites, harsh preparation conditions, which severely limit performance. In this study, small-sized nanoparticles (BNO-Ov-3) enriched with oxygen vacancies were successfully one-step solvothermal using ethylene glycol solvent structure-directing agent. Glycol not only inhibited grain growth reduced size micrometers nanometers, but also promoted formation through reducing property. Compared conventional method, BNO-Ov-3 enhanced degradation rate tetracycline hydrochloride (TC) 49.8% 92.1% under visible light irradiation. The mechanism performance enhancement was revealed XPS, EPR, PL characterization: synergistic effect nanosize effectively photogenerated carrier complexation charge separation transfer. This study provides strategy controlled synthesis bismuth lays theoretical foundation application in photocatalysis.

Язык: Английский

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Sustainable Remediation of Chromium(VI) Using a Woollen-Flower-Like Bi₂WO₆/Cellulose Nanocomposite under Solar Irradiation

ACS Applied Engineering Materials, Год журнала: 2025, Номер unknown

Опубликована: Апрель 28, 2025

Язык: Английский

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

Langmuir, Год журнала: 2025, Номер unknown

Опубликована: Май 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.

Язык: Английский

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Integrated catalytic membranes for advanced antibiotic wastewater treatment: Synergistic separation-degradation mechanisms and next-generation design

Separation and Purification Technology, Год журнала: 2025, Номер unknown, С. 133440 - 133440

Опубликована: Май 1, 2025

Язык: Английский

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CO2-pressure-induced dual-defect engineering in 2D alloys: Achieving ultra-narrow voltage window and enhanced stability for acidic water electrolysis

Journal of Colloid and Interface Science, Год журнала: 2025, Номер unknown, С. 137931 - 137931

Опубликована: Май 1, 2025

Язык: Английский

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