<abstract xmlns="http://www.w3.org/1999/xhtml">As TiO2 is suitable for electronic and electrical applications, in the present work the authors have successfully modified TiO2 by adding silver (Ag) to form titanium oxide-silver oxide (TiO2:Ag2O) nanocomposite samples by using sol-gel technique. Characterizations of these composites have been performed using X-ray diffraction (XRD), atomic force microscopy (AFM), scanning electron microscopy (SEM) and UV-Vis spectroscopy. XRD study revealed that the crystal structure of the samples consisted of tetragonal and cubic phases. This study further showed an increment in the average crystallite size from 8 nm to 38 nm with an increase in Ag concentration. The increase in crystallite size has been confirmed additionally by SEM and AFM. The increment in the average particle size of the samples may be attributed to an increase in silver molarity in the TiO2 matrix. Significant red shift in the absorption edge has been observed, causing reduction in the energy bandgap of the composites from 3.89 eV to 3.46 eV with an increase in particle size which is evident from UV-Vis spectroscopic studies. This wide-band gap properties of the TiO2:Ag2O nanocomposite make it suitable for memory-storage devices and dielectric applications.</abstract>

As TiO2 is suitable for electronic and electrical applications, in the present work the authors have successfully modified TiO2 by adding silver (Ag) to form titanium oxide-silver oxide (TiO2:Ag2O) nanocomposite samples by using sol-gel technique. Characterizations of these composites have been performed using X-ray diffraction (XRD), atomic force microscopy (AFM), scanning electron microscopy (SEM) and UV-Vis spectroscopy. XRD study revealed that the crystal structure of the samples consisted of tetragonal and cubic phases. This study further showed an increment in the average crystallite size from 8 nm to 38 nm with an increase in Ag concentration. The increase in crystallite size has been confirmed additionally by SEM and AFM. The increment in the average particle size of the samples may be attributed to an increase in silver molarity in the TiO2 matrix. Significant red shift in the absorption edge has been observed, causing reduction in the energy bandgap of the composites from 3.89 eV to 3.46 eV with an increase in particle size which is evident from UV-Vis spectroscopic studies. This wide-band gap properties of the TiO2:Ag2O nanocomposite make it suitable for memory-storage devices and dielectric applications.

Structural and optical studies of TiO2:Ag2O nanocomposite by sol-gel method

Department of Physics, Maulana Azad National Institute of Technology

Materials Science-Poland

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Structural and optical studies of TiO:AgO nanocomposite by sol-gel method

As TiO2 is suitable for electronic and electrical applications, in the present work the authors have successfully modified TiO2 by adding silver (Ag) to form...

Structural and optical studies of TiO₂:Ag₂O nanocomposite by sol-gel method

Publié en ligne: 06 oct. 2020

Pages: 263 - 270

Reçu: 31 mai 2017

Accepté: 23 avr. 2019

DOI: https://doi.org/10.2478/msp-2020-0036

Mots clés
sol-gel, TiO:AgO nanocomposite, strain, Tauc plot

© 2020 Vaibhav Koutu et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Structural and optical studies of TiO2:Ag2O nanocomposite by sol-gel method

Publié en ligne: 06 oct. 2020

Pages: 263 - 270

Reçu: 31 mai 2017

Accepté: 23 avr. 2019

DOI: https://doi.org/10.2478/msp-2020-0036

Mots cléssol-gel, TiO:AgO nanocomposite, strain, Tauc plot

© 2020 Vaibhav Koutu et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Structural and optical studies of TiO₂:Ag₂O nanocomposite by sol-gel method

Mots clés
sol-gel, TiO:AgO nanocomposite, strain, Tauc plot