Mon, December 16, 2019   Advanced Search

Optical Properties of TiO2 Nanostructure due to the Transformation from Cauliflower to Tablet-like Structure

J. S. Roy and T. Pal Majumder

Department of Physics, University of Kalyani, Kalyani-741235, West Bengal, INDIA.


Cauliflower-like TiO2 has been prepared by hydrothermal method using tetrabutyl titanate or titanium butoxide as titanium source and then tablet-like TiO2 has been obtained from cauliflower-like TiO2 after heating it at 10000C for 2 hrs. The optical properties have been tuned due to the morphological modification of TiO2 nanostructures from cauliflower like structure to tablet like structure. The optical band gap has been blue shifted from 3 eV to 3.05 eV and photoluminescence emission peak shifts towards shorter wavelength by 5.5 nm. The photoluminescence emission peak has been observed at 417nm and 411.5 nm for cauliflower-like TiO2 and tablet-like TiO2 structures, respectively.

Keywords : Nanostructures; Annealing; Sol-gel growth; Photoluminescence spectroscopy.