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Bactericidal Action of Silver Nanoparticles Dispersed in Silica Synthesized through the Sol Gel Method



Author(s)

Dolores Silvia Solís Mendiola¹, Ulises Arellano Sánchez¹, Maximiliano Joel Asomoza Palacios¹, Jin An Wang², Lifang Chen² and Fancisco Javier Tzompantzi Morales¹

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DOI:10.17265/2161-6213/2017.9-10.003

1. Departamento de Química, Universidad Autónoma Metropolitana-Iztapalapa, Av. San Rafael Atlixco No. 186, Iztapalapa, Mexico City 09340, Mexico
2. ESIQIE, Instituto Politécnico Nacional, Col. Zacatenco, Av. Politécnico s/n, Mexico City 07738, Mexico

A series of Ag⁰ nanoparticle materials supported in SiO₂ were synthesized by the sol-gel method, with contents of 2, 5 and 10% w/w. The fresh samples were calcinated and reduced with H₂ at 500 °C in order to obtain Ag⁰. The materials obtained were studied by X-ray diffraction, N₂ physisorption, UV-vis spectroscopy, electronic transmission microscopy and EDS (energy dispersive spectrometer). The antibacterial activity was observed in the deactivation of E. coli in its liquid phase, using the plate count method to identify viable CFU (colony forming units). The results show that the materials containing Ag nanoparticles dispersed in SiO₂ increase their bactericidal efficiency on the increase of the content and size of Ag nanoparticles.

Sol-gel synthesis, Ag-SiO₂, Ag⁰ dispersion, bactericidal action, silica matrix.