Iron-doped titanium dioxide nanotubes: a study of electrical,optical, and magnetic properties |
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Authors: | Syed Tajammul Hussain Asima Siddiqa Muhammad Siddiq Salamat Ali |
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Institution: | (1) Nanoscience and Catalysis Division, National Centre for Physics, Quaid-i-Azam University Campus, Islamabad, 44000, Pakistan;(2) Department of Chemistry, Quaid-i-Azam University, Islamabad, 45320, Pakistan;(3) Physics Department, Government College University, Lahore, Pakistan |
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Abstract: | Abstract Iron doped titanium oxide nanotubes (TNTs) were synthesized by hydrometallurgical process using a mixture of NaOH and methanol
as precipitating and reducing agents, respectively. Nanotubes with a high purity and good aspect ratio are produced as indicated
by X-ray diffraction (XRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). The characterization
data show that high-purity Fe-doped TNTs with diameter around 12–14 nm and length around 400–460 nm are synthesized using
this process. The TNTs are found to be in the anatase phase and as the Fe doping is increased, the conductivity increases.
UV/VIS data suggest the red shift in the peaks and increased absorption on the account of doping. The studies on microcosmic
magnetic properties of the sample with 15% Fe content indicate the component of magnetic moment in the axial direction of
nanotubes. Doping of Fe is found to considerably affect the crystallite size, Curie temperature (T
c), DC conductivity (σ), and Raman shifts. |
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