Effect of aging on the properties of TiO2 nanoparticle
محورهای موضوعی : Journal of Theoretical and Applied Physics
Nafise Ebrahim Jasbi
1
(
Physics Department, Science Faculty, Central Tehran Branch, Islamic Azad University
)
Davoud Dorranian
2
(
Laser Laboratory, Plasma Physics Research Center, Science and Research Branch, Islamic Azad University
)
کلید واژه: Laser ablation, TiO nanoparticle, Absorption spectra, XRD, Exitonic resonance,
چکیده مقاله :
AbstractEffect of aging on the properties of titanium dioxide nanoparticles produced by laser ablation process in water is investigated experimentally. The fundamental wavelength of a Q-switched Nd:YAG laser was employed to irradiate a high-purity Ti plate in distilled water at temperatures of 20, 35, 50 and 65 °C. Produced nanoparticles were diagnosed by UV–Vis–NIR spectroscopy, X-ray diffraction method, and dynamic light scattering device immediately after production and 1 week after. Bandgap energy of samples was extracted using Tauc method. Size of nanoparticles was increased after a week and their bandgap energy was decreased. Results show that the phase of TiO2 nanoparticles was transited from brookite to rutile after 1 week.
