The Increase of the Photodegradation and the Improvement of the Electrical Properties of Titanate Nanorods doped by Aluminum Oxide and Calcination Temperature

In present research, fabrication of doped TiO2 nanorods ‎by importing aluminum oxide as dopant via using the sol-gel method and alkaline corrosion ‎are reported. The morphologies, topography, nano crystal structures and electrical properties of TiO2 ‎nanorods are characterized. Degradation rate of methylen ‎blue MB in its aqueous solution under UV irradiation is investigated as an ‎amount of photocatalytic activity. The presence of aluminum oxide dopant to the TiO2 matrix promotes the photocatalytic activity because of the thermal stability and raising the surface area. Dependence between photocatalytic activity ‎and calcination temperatures is specified. Dielectric constant, capacity, quality ‎factor and resistance are measured. Moreover, the effects ‎of aluminum oxide dopant and calcination temperatures on surface topography, crystallization ‎of phases, dielectric constant, electrical resistance, lattice strain and activation ‎energy of nanoparticles formation are studied. The obtained results show that aluminum oxide-doped TiO2 nanorods have higher dielectric constant, higher photocatalytic activity, less leakage current, less roughness surface, less lattice strain and higher thermal stability. Therefore, these nanorods have the potential to be a suitable candidate as a gate dielectric material for the future of FETs.