Journal
JOURNAL OF MATERIALS CHEMISTRY C
Volume 5, Issue 17, Pages 4257-4267Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c7tc00233e
Keywords
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Funding
- DAE-BRNS, India [2011/37P/11/BRNS/1038-1]
- CSIR, India [03(1302)/13/EMR-II]
- UGC, India [F: 42-787/2013 (SR)]
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The structural, optical, magnetic, and electrical properties of sol-gel-derived Ti(1-)xFexO(2) (0.00 <= x <= 0.05) nanoparticles were investigated. Rietveld refinement of the X-ray diffraction data and TEM measurements were carried out to analyze the crystalline structure and quality of all the samples. Raman spectroscopy revealed a decrease in intensity and broadening of the characteristics peaks of Fe-doped TiO2 with respect to those of the pristine sample, which signifies a structural distortion of the lattices. FT-IR, UV-vis, and PL spectroscopy were used to investigate the optical properties. Magnetic measurements showed a weak ferromagnetism at room temperature in both the pristine and Fe-doped TiO2 (x = 0, 0.02, and 0.05) nanoparticles. Temperature-dependent resistivity measurements showed the semiconducting nature of the samples and revealed that the thermally activated conduction (Arrhenius) mechanism is valid in the high-temperature region, whereas Mott variable range hopping (VRH) mechanism is valid in the low-temperature region. Dielectric properties of the samples were studied as a function of temperature in the frequency range of 1 kHz to 1 MHz.
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