期刊
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
卷 114, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.mssp.2020.105082
关键词
GO/TiO2 thin films; Photocatalysis; CO2 photoreduction
类别
资金
- Mexican National Research Council CONACYT (Mexico)
Titanium dioxide modified with graphene oxide (GO/TiO2) nanocomposite thin films were prepared on glass substrates by a sol-gel route using the dip coating technique for photocatalytic applications. The graphene oxide powders, fabricated through a modified Hummers' method, and the GO/TiO2 thin films were characterized by electron microscopy, XRD, Raman and UV-VIS spectroscopy to evaluate their structural, morphological and optical properties. The energy bandgap estimated for the thin films is in the range of 3.38-3.45 eV after an annealing at 450 degrees C; while the transmittance and the Raman intensity decreased significantly by increasing the amount of GO. The photocatalytic activity of the GO/TiO2 thin films, investigated by the blenching of methylene blue, showed a significant increment with the addition of GO; furthermore, the films exhibited potential applications in the photoreduction of CO2, in which a methanol production of 68.443 mu mol cm(-2) was observed after 5 h of reaction in the presence of UV light.
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