Synthesis of yttrium incorporated TiO₂ nanostructures with 3D gC₃N₄ (graphitic carbon nitride) hybrid nanocomposite have been accomplished by adopting facile solvothermal method. Three dimentional gC₃N₄ was synthesized by thermal pyrolysis of thiourea. Mixed green solvent of glycerol and ethanol have been employed for the one pot solvothermal synthesis of TiO₂, Y doped TiO₂ nanostructures and yttrium doped TiO₂ with 3D gC₃N₄ hybrid nanostructures. The prepared nanomaterials have been exploited for fabricating the working electrode for supercapaitor application. Performance of the eletrode consists of Y:TiO₂/3D gC₃N₄ hybrid composite material was compared with the electrodes made up of Y:TiO₂ and pristine TiO₂. The synthesized materials have been characterized by XRD and RAMAN for structural analysis. From the analysis of XRD we could observe that the presence of gC₃N₄ in the prepared sample does not modify the phase of TiO₂. The morphology and elemental compositions of the prepared samples were carefully analyzed by FESEM and EDS studies. The Cyclic Voltammetry and Galvanostatic Charging/Discharging studies have been performed for the electrodes contain pristine TiO₂, Y: TiO_2, Y: TiO₂/gC₃N₄.The specific capacitance of the electrode containing Y: TiO₂/gC₃N₄ sample shows a sufficiently higher value compared with other two electrodes containing TiO₂, Y: TiO₂.

Keywords: Green synthesis, Glycerol, Solvothermal, Yttrium doped TiO₂, graphitic carbon nitride.