Synthesis and characterization of graphene oxide - TiO2 thin films by sol-gel for photocatalytic applications

被引：36

作者：

Velasco-Hernandez, A. ^{[1
]}

Esparza-Munoz, R. A. ^{[2
]}

de Moure-Flores, F. J. ^{[1
]}

Santos-Cruz, J. ^{[1
]}

Mayen-Hernandez, S. A. ^{[1
]}

机构：

[1] Univ Autonoma Queretaro, Fac Quim, Mat Energia, Queretaro 76101, Mexico

[2] Univ Nacl Autonoma Mexico, Ctr Fis Aplicada & Tecnol Avanzada, Queretaro 76101, Mexico

来源：

MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING | 2020年 / 114卷

关键词：

GO/TiO2 thin films; Photocatalysis; CO2; photoreduction; RAMAN-SPECTRUM; CO2; REDUCTION; ANATASE; NANOCOMPOSITES; PHOTOLUMINESCENCE; COMPOSITE; OXIDATION; LAYER;

D O I：

10.1016/j.mssp.2020.105082

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

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.

引用

页数：9

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