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Changing width bandgap of TiO2 nanoparticles incorporating GO

Published online by Cambridge University Press:  10 January 2020

Daniela K. Calvo-Ramos ,
Marina Vega-González ,
José Santos-Cruz ,
Francisco Javier De Moure-Flores  and
Sandra A. Mayén-Hernández Open the ORCID record for Sandra A. Mayén-Hernández [Opens in a new window]
Daniela K. Calvo-Ramos
Affiliation:
Facultad de Química, Posgrado en Ciencias de la Energía, Universidad Autónoma de Querétaro, 76010 Qro. México.
Marina Vega-González
Affiliation:
Centro de Geociencias, Universidad Nacional Autónoma de México, Querétaro, 76230 Qro. México.
José Santos-Cruz
Affiliation:
Facultad de Química, Posgrado en Ciencias de la Energía, Universidad Autónoma de Querétaro, 76010 Qro. México.
Francisco Javier De Moure-Flores
Affiliation:
Facultad de Química, Posgrado en Ciencias de la Energía, Universidad Autónoma de Querétaro, 76010 Qro. México.
Sandra A. Mayén-Hernández*
Affiliation:
Facultad de Química, Posgrado en Ciencias de la Energía, Universidad Autónoma de Querétaro, 76010 Qro. México.
*
*E-mail: [email protected] (S.A. Mayén Hernández)
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Abstract

Nanoparticles of titanium dioxide (TiO2), synthesized by the sonochemical technique, were mixed with different amounts of graphene oxide (GO), obtained by the improved method of Hummer, in order to modify their bandwidth. The TiO2/OG compounds were characterized using different techniques: X-ray Diffraction (XRD), transmission electron microscopy (TEM), Raman and UV-Vis-NIR spectroscopy. TiO2 bandgap decreased, with GO incorporation, from 3.2 to 2.72 eV when GO was present at 20 weigh percentage (TiO2/GO-20%). Photodegradation experiments of methylene blue (MB) were performed with the materials to verify their photocatalytic activity. At 40 minutes, the pure TiO2 degraded 48% of MB, whereas the compound TiO2/GO-20% degraded 88%, showing a good incorporation of both compounds and the improvement of TiO2 photocatalitic properties.

Keywords

grapheneoxidesol-gelTi
Type
Articles
Information
MRS Advances , Volume 4 , Issue 61-62: International Materials Research Congress XXVIII , 2019 , pp. 3423 - 3431
Copyright
Copyright © Materials Research Society 2020 

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