The Effects of Electron Beam Irradiation on Structural and Optical Properties of TiO₂ Particles

Abstract:

The effect of electron irradiation on structural and optical properties of TiO₂ particles has been studied. The crystallinity change was observed at low dose irradiation (4-20 kGy) while phase transformation from pure anatase to mixture of anatase-rutile was inevitable after 100 kGy without significant change in crystallinity. The highest fraction of rutile:anatase ratio was 20:80 obtained at 700 kGy. Morphology study demonstrated that TiO₂ particles were spherical, nano-sized and heavily agglomerated with no obvious microstructural changes were observed after irradiation. The direct and indirect band gap (E_g) showed a decrement at low dose but re-increased after irradiation at >100 kGy. The highest E_g was at 700 kGy which can be explained by the changes of TiO₂ atomic structure in the presence of mixture anatase:rutile. Therefore, the electron beam irradiation does affect both structural and optical properties of TiO₂ nanoparticles. This is expected to affect the photocatalytic activity of TiO₂.

• Periodical: Materials Science Forum (Volume 888)
• Pages: 297-303
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.888.297
• Online since: March 2017
• Authors: Cik Rohaida CHE HAK, Siti Salwa Zainal Abidin, Nur Ubaidah Saidin, Siti Aishah Ahmad Fuzi, Yusof Abdullah, Meor Yusoff Meor Sulaiman
• Keywords: Band Gap, Electron Beam, TiO₂

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