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 Detalle_Publicacion

Improved photocatalytic and antibacterial performance of Cr doped TiO2 nanoparticles

Abstract: The effect of Cr and N doping in the adsorption capacity, photocatalytic properties and antibacterial response of TiO2 anatase nanoparticles is analyzed. The nanoparticles (N-TiO2, Cr-TiO2 and Cr/N-TiO2) were prepared by the sol-gel method. The structural (X-ray diffraction and TEM) and magnetic (SQUID magnetometry) characterization confirms the nanosized nature of the anatase nanoparticles and the absence of secondary phases. The enhancement of the adsorption capacity of the dye (methyl orange) on the surface of the catalysts for the Cr and Cr/N doped samples, together with the redshift of the UV-Vis absorbance spectra promote a high photocatalytic performance under visible light in these nanocatalysts. The culturability and viability of the Escherichia coli DH5? in a medium supplemented with the nanoparticles was characterized and compared with the evolution under visible light (both without and with nanoparticles). The results show that Cr-TiO2 nanoparticles under visible light display antibacterial activity that cannot be accounted by the toxicity of the nanoparticles alone. However the antibacterial effect is not observed in N-TiO2 and Cr/N-TiO2. The differences in the electrostatic charge (isoelectric point) and the degree of nanoparticle dispersion are invoked as the main origins of the different antibacterial response in the Cr-TiO2 nanoparticles.

 Fuente: Surfaces and Interfaces, Volume 22, 2021, article 100867

Editorial: Elsevier

 Fecha de publicación: 01/02/2021

Tipo de publicación: Artículo de Revista

 DOI: 10.1016/j.surfin.2020.100867

ISSN: 2468-0230

Proyecto español: MAT2017-83631-C3-R

Url de la publicación: https://doi.org/10.1016/j.surfin.2020.100867

Autores/as

GOMEZ-POLO, C.

LARUMBE, S.

GIL, A.

MUÑOZ, D.

LIDIA RODRIGUEZ FERNANDEZ

GARCÍA-PRIETO, A.

FERNÁNDEZ-GUBIEDA, M.L.

MUELA, A.