Abstract
In this work, we deposit Graphene Oxide (GO) films on Titanium Dioxide nanotubes (TiO2NTs); electrochemical characterization of this system shows that this structure has potential applications as a pH sensor. TiO2NTs were obtained by electrochemical anodization technique, the GO was fabricated by modified Hummer's method, and deposited by dip coating technique, at room temperature. The thermally treated TiO2NTs/GO structure shows a reduction of the GO deposited film. The samples were characterized by Raman spectroscopy, X-ray Photoelectron Spectroscopy, and Scanning Electron Microscopy. Depending on the GO oxidation time and thermal treatment, we observe a uniform reduced GO film on the TiO2NTs. A pH electrode characterization shows a linear response of the TiO2NTs/GO of 57 mV/pH with non-hysteresis effect.
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