학술논문
Photocatalytic Activity and Antibacterial Effect of [Ag.sub.3]P[O.sub.4] Powders Against Methicillin-resistant Staphylococcus aureus
Document Type
Report
Author
Source
Orbital: The Electronic Journal of Chemistry. April-June, 2021, Vol. 13 Issue 3, p241, 9 p.
Subject
Language
English
ISSN
1984-6428
Abstract
1. Introduction Silver orthophosphate ([Ag.sub.3]P[O.sub.4]) is a well-known, visible-light-driven photocatalyst and a p-type semiconductor with an indirect band gap of 2.36 eV [1]. It has attracted widespread attention for harvesting [...]
In this study, silver phosphate ([Ag.sub.3]P[O.sub.4]) was successfully prepared through a simple precipitation method, and its structural, optical, and morphological properties were characterized by X-ray diffraction, Rietveld refinement, Fourier transform infrared spectroscopy, UV-vis diffuse reflectance spectroscopy, photoluminescence measurements, and field emission scanning electron microscopy (FE-SEM). Thereafter, the photocatalytic activity for the degradation of rhodamine B (RhB) dye and the antibacterial effect against methicillin-resistant Staphylococcus aureus (MRSA) were analyzed. [Ag.sub.3]P[O.sub.4] was highly photocatalytic, degrading approximately 100% of the RhB after 25 min of visible light exposure. The photocatalytic mechanism was evaluated by trapping experiments indicating that photogenerated holes and superoxide radicals were the principal species present in the photocatalytic system. In addition, [Ag.sub.3]P[O.sub.4] is a potential bacterial agent as it reduced the MRSA population even at sub-inhibitory concentrations. Morphological changes of the MRSA cells exposed to [Ag.sub.3]P[O.sub.4] powder were investigated by the FE-SEM analysis, and a possible mechanism involving the release of dissolved [Ag.sup.+], together with the production of reactive photocatalytic oxygen species is proposed based on the experimental results. Keywords [Ag.sub.3]P[O.sub.4] Antibacterial activity Photocata lysis Rhodamine B Graphical abstract
In this study, silver phosphate ([Ag.sub.3]P[O.sub.4]) was successfully prepared through a simple precipitation method, and its structural, optical, and morphological properties were characterized by X-ray diffraction, Rietveld refinement, Fourier transform infrared spectroscopy, UV-vis diffuse reflectance spectroscopy, photoluminescence measurements, and field emission scanning electron microscopy (FE-SEM). Thereafter, the photocatalytic activity for the degradation of rhodamine B (RhB) dye and the antibacterial effect against methicillin-resistant Staphylococcus aureus (MRSA) were analyzed. [Ag.sub.3]P[O.sub.4] was highly photocatalytic, degrading approximately 100% of the RhB after 25 min of visible light exposure. The photocatalytic mechanism was evaluated by trapping experiments indicating that photogenerated holes and superoxide radicals were the principal species present in the photocatalytic system. In addition, [Ag.sub.3]P[O.sub.4] is a potential bacterial agent as it reduced the MRSA population even at sub-inhibitory concentrations. Morphological changes of the MRSA cells exposed to [Ag.sub.3]P[O.sub.4] powder were investigated by the FE-SEM analysis, and a possible mechanism involving the release of dissolved [Ag.sup.+], together with the production of reactive photocatalytic oxygen species is proposed based on the experimental results. Keywords [Ag.sub.3]P[O.sub.4] Antibacterial activity Photocata lysis Rhodamine B Graphical abstract