Ghassem Kavei
Material and Energy Research Centre, Iran
Title: TiO2 nano composite thin films texture and properties in self-cleaning process
Biography
Biography: Ghassem Kavei
Abstract
Titanium Dioxide (TiO2) has been considered as an ideal photocatalyst due to its chemical properties. This paper is discusses about how TiO2 nanoparticle in a thin film work as a photocatalyst for self-cleaning purpose and in future we prove how doping increase photocatalytic activation in visible light range. In this work, nanostructured TiO2 thin films were grown by spray pyrolysis technique on glass substrates at 400°C. TiO2 thin films were then annealed at 600-1000°C in the air for a period of 3 hours. The samples were characterized at several views; thickness of the films was measured by Focused Ion Beam (FIB) and field ion beam. The effect of annealing on the structure, morphology and optical properties was studied. The X-ray diffraction (XRD) and Atomic Force Microscopy (AFM) measurements confirmed that the films grown by this technique have good crystalline structure and homogeneous surface. The study also reveals that the RMS value of thin film roughness increased with increasing annealing temperature. The optical properties of the films were studied by UV-Vis spectrophotometer. The optical transmission results showed that the transmission over ~65%, which decrease with the increasing of annealing temperatures.