Efficient visible-light-driven photocatalytic removal of Acid Blue 92, E. coli, and S. aureus over Ag-AgCl nanoparticles-decorated bismuth sulfide microparticles

Bismuth sulfide particles were modified with Ag-AgCl nanoparticles to make a visible light active plasmonic photocatalyst. The powder x-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), energy dispersive x-ray (EDX), elemental mapping, nitroge...

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Bibliographic Details
Published in:Materials research express 2023-10, Vol.10 (10), p.105008
Main Authors: Dawi, E A, Padervand, M, Bargahi, A, Eftekhari-Sis, B, Bahrami, M K, Abdelkader, A
Format: Article
Language:English
Subjects:
Ag-AgCl nanoparticles
Anions
Aqueous solutions
Bacteria
bismuth sulfide particles
Bismuth sulfides
Diffuse reflectance spectroscopy
E coli
Electron microscopy
Fourier transforms
Infrared spectroscopy
Light irradiation
Microparticles
Microscopy
Nanoparticles
Photocatalysis
Photocatalysts
Photodegradation
Photoluminescence
plasmonic photocatalyst
Plasmonics
Silver chloride
Spectrum analysis
superoxide anion radicals
X ray powder diffraction
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Summary:Bismuth sulfide particles were modified with Ag-AgCl nanoparticles to make a visible light active plasmonic photocatalyst. The powder x-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), energy dispersive x-ray (EDX), elemental mapping, nitrogen adsorption–desorption isotherms (BET-BJH), photoluminescence (PL), and diffuse reflectance spectroscopy (DRS) techniques were served to analyze the morphological and structural properties. To evaluate the photocatalytic performance, Acid Blue 92 (AB92) azo dye was degraded in the aqueous solution under visible light irradiation. According to the results, 0.025 g of the photocatalyst powder was able to remove more than 98% of AB92 at 15 ppm concentration under neutral acidity, following pseudo first-order kinetics. Superoxide anion radicals (O 2 •− ) were also recognized as the most key species promoting the photodegradation pathway. Also, the antibacterial activity of the materials was explored against E. coli and S. aureus pathogenic bacteria under irradiation and dark conditions. Using transmission electron microscopy (TEM) images of the treated cells, it was found that the plasmonic photocatalyst damaged the cell wall structure of both gram-positive and negative bacteria within 2 h significantly, which could be attributed to the efficient production of destructive superoxide anion radicals on the surface of Ag-AgCl/Bi 2 S 3 particles under illumination.
ISSN:2053-1591
2053-1591
DOI:10.1088/2053-1591/ad0288