Publicación

Tipo de publicación: Artículos científicos (Publicados en revistas de divulgación o científicas)

Título del artículo: Medicinal Plants Extract for the Bio-Assisted Synthesis of Ag/AgCl Nanoparticles with Antibacterial Activity

Registrado por: Sergio Gómez-Cornelio

Año de publicación: 2025

Resumen: The increasing antibiotic resistance necessitates sustainable methods for synthesizing antibacterial nanoparticles. This study focuses on the bio-assisted synthesis of silver/silver chloride nanoparticles (Ag/AgCl-NPs) using aqueous extracts of Acalypha arvensis, Hampea rovirosae, and Inga jinicuil. Polyphenols and flavonoids were quantified, and functional groups were analyzed via Fourier-transform infrared to assess their influence on the properties of Ag/AgCl-NPs. The effects of thermal treatment at 60 and 500?°C on the NPs’ size, morphology, and antibacterial efficacy were assessed. UV–Vis spectroscopy indicated absorption peaks between 430 and 449?nm, while X-ray diffraction analysis confirmed the presence of metallic Ag and a cubic AgCl structure, with crystallite sizes ranging from 11–51 and 28–60?nm, respectively. Dynamic light scattering showed hydrodynamic sizes of up to 127.2?±?0.9?nm at 60?°C and up to 348.9?±?10.7?nm at 500?°C. Field emission scanning electron microscopy micrographs exhibited a quasi-spherical morphology with significant agglomeration; showing particle sizes between 55?±?11 and 81?±?28?nm at 60?°C, and up to 135?±?65?nm at 500?°C. X-ray photoelectron spectroscopy confirmed the metallic silver (Ag?), organic molecules, and absorbed chlorides on the NP surface. Pearson correlation analysis indicated a strong positive correlation between polyphenol content and NPs yield (r?=?0.922), while it indicated a strong negative correlation with flavonoid content (r?=??0.996). Additionally, a negative correlation was found between hydrodynamic size and antibacterial activity against Staphylococcus aureus (r?=??0.854). The Ag/AgCl-NPs, after drying at 60 and 500?°C, were tested against Escherichia coli and S. aureus with minimum bactericidal concentrations below 19?µg/mL against E. coli. Minimum inhibitory concentration (MIC) for Ag/AgCl-NPs synthesized with A. arvensis and H. rovirosae extracts were above 312?µg/mL for S. aureus, while those synthesized with I. jinicuil showed MIC as low as 156?µg/mL. These results highlight the potential of medicinal plant extracts in the synthesis of Ag/AgCl with enhanced antibacterial properties.

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Autor(es): Jorge Luis Torres-López, Stephania Lázaro-Mass, Susana De la Rosa-García, Mayra A. Álvarez-Lemus, Abraham Gómez-Rivera, Rosendo López-González, Carlos Ernesto Lobato-García, Getsemani Morales-Mendoza, Sergio Gómez-Cornelio

Campo: Ingeniería

Disciplina: Ingeniería Química

Subdisciplina: Ciencia de materiales

Número de registro: DOI: 10.1007/s10876-024-02722-w