Synthesis and Optical, Photoconductivity Study of Safranin O Dye Sensitized Titania/Silica Oxide System Prepared by Modified Sol-gel Method
D. Arun Kumar1, J. Merline Shyla2, Francis P. Xavier3

1D. Arun Kumar, Department of Physics, Bannari Amman Institute of Technology Autonomous, Sathyamangalam (Tamil Nadu), India.
2J. Merline Shyla, Department of Physics, Loyola Institute of Frontier Energy LIFE Loyola College, Chennai (Tamil Nadu), India.
3Francis P. Xavier, Department of Physics, Loyola Institute of Frontier Energy LIFE Loyola College, Chennai (Tamil Nadu), India.
Manuscript received on 10 December 2018 | Revised Manuscript received on 29 December 2018 | Manuscript Published on 09 January 2019 | PP: 17-22 | Volume-7 Issue-4S November 2018 | Retrieval Number: E1859017519/19©BEIESP
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Abstract: Binary TiO2/SiO2 oxides were prepared by modified sol-gel method and calcined at 500oC for 5 hours. The TiO2/SiO2nanocomposites was sensitized with different concentrations of Safranin O dye solutions ranging from 1×10-2 mM to 5×10-2mM. The amount of dye adsorbed, amount of dye absorbed per unit mass and percentage of dye adsorbed increases with increase of concentration of dye. The Safranine O dye-sensitized TiO2/SiO2nanocomposites exhibit an intense peak at 520 nm due to n→π* transition enhances the spectral response of TiO2/SiO2nanocomposites to visible light. The field dependent dark and photoconductivity studies reveals that the dark and photocurrent are increase linearly with applied field. From the photoconductivity results, it was observed from the plots that for the highest concentration of dye sensitized (5×10-5 M), the photo current density increases by an order of 75 in comparison with that of TiO2/SiO2nanocomposites.
Keywords: TiO2-SiO2, Oxides, Composites, Mesoporous, Photoconductivity, Semiconductors, Dye Sensitization.
Scope of the Article: Optical Link Design