A facile dip-coating process graphene-TiO2 on titanium foil for hybrid electrode fabrication

Titanium dioxide modified with graphene oxide $(\text{GO-TiO}_{2})$ nanocomposite films were successfully prepared on titanium foil by a facile and low-cost dip-coating technique for fabrication of hybrid electrode. $\text{TiO}_{2}$ nanolayer was grown on titanium foil by thermal oxidation $(\text{Ti-TiO}_{2})$ at $500^{\circ}\mathrm{C}$ in 0.5 M hydrofluoric acid. GO film was deposited on $\text{Ti-TiO}_{2}$ layers by dip-coating method, respectively, and thermally treated for fabrication of hybrid electrode based on $\text{Ti-TiO}_{2}\text{-rGO}$. Investigations such as X-ray diffraction, UV-VIS analysis and SEM morphology were used for analysis of the structural and morphological characteristics of the as-synthesized films. The electrochemical characterization will be performed by cyclic voltammetry, in 1M KOH supporting electrolyte, scan range $-0.3\mathrm{V}/\text{SCE}$ and 1.4 V/SCE.