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Abstract:

TiO2 nanotubes were synthesized by alkaline hydrothermal treatment of TiO2 nanoparticles with a controlled proportion of anatase and rutile. Tailoring of TiO2 phases was achieved by adjusting the pH and type of acid used in the hydrolysis of titanium isopropoxide (first step in the sol-gel synthesis). The anatase proportion in the precursor nanoparticles was in the 3-100% range. Tube-like nanostructures were obtained with an anatase percentage of 18 or higher while flake-like shapes were obtained when rutile was dominant in the seed. After annealing at 400°C for 2 h, a fraction of nanotubes was conserved in all the samples but, depending on the anatase/rutile ratio in the starting material, spherical and rod-shaped structures were also observed. The photocatalytic activity of 1D nanostructures was evaluated by measuring the deactivation of E. coli in stirred water in the dark and under UV-A/B irradiation. Results show that in addition to the bactericidal activity of TiO2 under UV-A illumination, under dark conditions, the decrease in bacteria viability is ascribed to mechanical stress due to stirring. © 2018 Julieta Cabrera et al.

Registro:

Documento: Artículo
Título:1D TiO2 nanostructures prepared from seeds presenting tailored tio2 crystalline phases and their photocatalytic activity for Escherichia coli in water
Autor:Cabrera, J.; Acosta, D.; López, A.; Candal, R.J.; Marchi, C.; García, P.; Ríos, D.; Rodriguez, J.M.
Filiación:Universidad Nacional de Ingeniería, Av. TúpacAmaru s/n,Rimac, Lima, Peru
Instituto de Física, Universidad Nacional Autónoma de México, Ciudad de Méxic20364, Mexico
Instituto de Investigación E Ingeniería Ambiental, Campus Miguelete, Universidad Nacional de San Martín, Provincia de Buenos Aires San Martin1650, Argentina
Centro de Microscopias Avanzadas, Universidad de Buenos Aires, FCEyN, Ciudad Universitaria, Buenos Aires, 1428, Argentina
Año:2018
Volumen:2018
DOI: http://dx.doi.org/10.1155/2018/1862597
Título revista:International Journal of Photoenergy
Título revista abreviado:Int. J. Photoenergy
ISSN:1110662X
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_1110662X_v2018_n_p_Cabrera

Referencias:

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Citas:

---------- APA ----------
Cabrera, J., Acosta, D., López, A., Candal, R.J., Marchi, C., García, P., Ríos, D.,..., Rodriguez, J.M. (2018) . 1D TiO2 nanostructures prepared from seeds presenting tailored tio2 crystalline phases and their photocatalytic activity for Escherichia coli in water. International Journal of Photoenergy, 2018.
http://dx.doi.org/10.1155/2018/1862597
---------- CHICAGO ----------
Cabrera, J., Acosta, D., López, A., Candal, R.J., Marchi, C., García, P., et al. "1D TiO2 nanostructures prepared from seeds presenting tailored tio2 crystalline phases and their photocatalytic activity for Escherichia coli in water" . International Journal of Photoenergy 2018 (2018).
http://dx.doi.org/10.1155/2018/1862597
---------- MLA ----------
Cabrera, J., Acosta, D., López, A., Candal, R.J., Marchi, C., García, P., et al. "1D TiO2 nanostructures prepared from seeds presenting tailored tio2 crystalline phases and their photocatalytic activity for Escherichia coli in water" . International Journal of Photoenergy, vol. 2018, 2018.
http://dx.doi.org/10.1155/2018/1862597
---------- VANCOUVER ----------
Cabrera, J., Acosta, D., López, A., Candal, R.J., Marchi, C., García, P., et al. 1D TiO2 nanostructures prepared from seeds presenting tailored tio2 crystalline phases and their photocatalytic activity for Escherichia coli in water. Int. J. Photoenergy. 2018;2018.
http://dx.doi.org/10.1155/2018/1862597