Study on Band Gap Energy of F Doped TiO₂ Nanotubes

Abstract:

Pure and F doped TiO₂ nanotubes was synthesized using simple hydrothermal method. The hydrothermal was conducted using teflon-liner autoclave and maintained at 150oC for 24 hours. The characterization of synthesised product was carried out using x-ray diffraction (XRD), transmission electron microscope (TEM), energy dispersive of x-ray spectroscopy (EDX) and ultra violet – visible light diffuse reflectance spectroscopy (UV-Vis DRS) for band gap measurements. XRD patterns indicated that anatase TiO₂ phase was remained after F doping suggested that fluorine was highly dispersed into TiO₂ by substituted with O in the TiO₂ lattice to formed TiO_2-xF_x solid solution. Morphology investigation using TEM found out small diameter of nanotubes structure within 8 – 10 nm of pure and F doped TiO₂ nanotubes. The band gap energy (E_g) of both nanotubes samples were almost similar proposing that F doping does not modify the band gap energy.

• Periodical: Materials Science Forum (Volume 889)
• Pages: 234-238
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.889.234
• Online since: March 2017
• Authors: Razali Mohd Hasmizam*, Nur Arifah Ismail, Yusoff Mahani
• Keywords: Band Gap, Flourine, Nanotube, Photocatalyst, Titanium Dioxide (TiO₂), Visible

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