Determination of the Band Gap and Intensity of Palladium/Silver Doped TiO2 Nano Particles Using Diffuse Reflectance and Photoluminescence Spectra

Authors

  • Omoniyi K.I. Ahmadu Bello University, Zaria, Nigeria
  • Aroh A.O. ABU ZARIA
  • Gimba C.E.
  • Abba H.
  • Yilleng M.T.

Keywords:

Sol immobilization, photoluminescence, band gap, intensity, Ag/Pd-TiO2

Abstract

The photocatalysts Pd/TiO2, Ag/TiO2 and Ag/Pd-TiO2 were prepared using the sol immobilization method. The photocatalysts were characterized by the use of diffuse reflectance spectra (DRS) and photoluminescence spectra. Analysis of Ag/TiO2 and Ag/Pd -TiO2 using diffuse reflectance spectra (DRS) indicated reduction of band gap energy from 3.2 eV to 2.7 eV for Ag/Pd-TiO2 which makes it possible for the use of sunlight as excitation energy. Photo luminescence spectra analysis carried out on the dopants of Ag/TiO2, Pd/TiO2 and Ag/Pd-TiO2 measured the intensity which gives the rate of recombination of photo-generated electron-hole pairs in TiO2. The result indicated that reduction in intensity was highest for the co-doped Ag/Pd-TiO2. This accounts for its increase in photo catalytic property. Therefore, modification of TiO2 with Ag and Pd will provide the platform for its enhanced photocatalytic performance relevant in environmental science.

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Author Biography

Omoniyi K.I., Ahmadu Bello University, Zaria, Nigeria

LECTURER, AHMADU BELLO UNIVERSITY, ZARIA, NIGERIA

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Published

27-12-2018

How to Cite

K.I., O., A.O., A., C.E., G., H., A., & M.T., Y. (2018). Determination of the Band Gap and Intensity of Palladium/Silver Doped TiO2 Nano Particles Using Diffuse Reflectance and Photoluminescence Spectra. Journal of Science and Technology, 10(3). Retrieved from https://publisher.uthm.edu.my/ojs/index.php/JST/article/view/2868