Room-temperature ferromagnetism of Fe-doped TiO2 nanoparticles driven by oxygen vacancy

Patel, S.; Kurian, Sajith; Gajbhiye, N. S.

doi:10.1016/j.materresbull.2012.11.031

Cited by 63 publications

(20 citation statements)

References 44 publications

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“…Sufficient concentration of oxygen vacancy defects which exceeded the some percolation threshold, leads to their overlaps with dopant ions forming bound magnetic polarons [50].…”

Section: Resultsmentioning

confidence: 99%

Room temperature ferromagnetism in Cu2+ doped TiO2 nanocrystals: The impact of their size, shape and dopant concentration

Vranješ

Kuljanin-Jakovljević

Konstantinović

et al. 2016

Materials Research Bulletin

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“…Sufficient concentration of oxygen vacancy defects which exceeded the some percolation threshold, leads to their overlaps with dopant ions forming bound magnetic polarons [50].…”

Section: Resultsmentioning

confidence: 99%

Room temperature ferromagnetism in Cu2+ doped TiO2 nanocrystals: The impact of their size, shape and dopant concentration

Vranješ

Kuljanin-Jakovljević

Konstantinović

et al. 2016

Materials Research Bulletin

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“…The spectrum of pure TiO 2 NPs has less a intensive spectrum compared to the doped sample. The signal at g ~ 2 can be assigned to oxygen vacancies in pure TiO 2 [33]. The obtained EPR results indicate that the Fe ions were successfully incorporated into the TiO 2 matrix, with a distribution of ions both on the surface and in the bulk.…”

Section: Electron Paramagnetic Resonance Spectroscopy (Epr)mentioning

confidence: 78%

“…By calculating the g factor (EPR parameter), it is possible to get information about the type of oxygen defects, using the following equation [33]:…”

Section: Electron Paramagnetic Resonance Spectroscopy (Epr)mentioning

confidence: 99%

“…The signal at g ~ 2 is related to Fe 3+ ions in the anatase bulk lattice, substituting Ti 4+ , in octahedral symmetry, which interact with each other through oxygen vacancies [8,[30][31][32][33]. The signal at g ~ 4.3 can be related to Fe 3+ isolated cations in a rhombic environment, attributable to the presence of oxygen vacancies in the anatase-like close environment of the cations [9,33]. Additionally, it can be attributed to the Fe 3+ ions dispersed on the surface of the TiO 2 nanoparticles [8,14].…”

Section: Electron Paramagnetic Resonance Spectroscopy (Epr)mentioning

confidence: 99%

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Structural, optical and photodegradation properties of pure and Fe-doped titania nanoparticles probed using simulated Solar light

Carević

Abazović

Savić

et al. 2016

Ceramics International

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We report the successful, low temperature synthesis of pure and Fe-doped titania nanoparticle (NP) powders, using organic Ti-and Fe-precursors. The properties of the synthesized titania based materials were obtained using XRD, UV/Vis and EPR spectroscopy and BET measurements. The doping of TiO 2 induced a shift in the absorption threshold towards the visible spectral range, compared to pure titania. The process of annealing induced an increase in crystallinity and particle sizes in theobtained materials. The photocatalytic activity, using simulated Solar light (Vitalux 2 lamp), of our samples was checked by following the photodegradation reaction of Rhodamine B and trichlorophenole as model compounds.

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“…This behavior is associated to the presence of structural defects such as oxygen vacancies, although metallic impurities also could be implied in the exchange interaction mechanism [2][3][4]. Thus, the correlation between room temperature ferromagnetism and defects (i.e.…”

Section: Introductionmentioning

confidence: 99%

Magnetic Properties of N- and (Cr, N)-Doped TiO<sub>2</sub> Nanoparticles

Larumbe

Gomez-Polo

2015

IEEE Trans. Magn.

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The effect of N and Cr doping on the magnetic properties of TiO 2 nanoparticles is analyzed in the present work. N and (Cr,N) doped TiO 2 nanoparticles were synthesized by sol-gel method using Titanium Tetraisopropoxide (TTIP) as metallic precursor, and urea and chromium nitrate as N and Cr doping precursors, respectively. The calcined nanoparticles were analyzed through X-ray diffraction and Rietveld refinement. The samples display anatase structure with mean grain sizes around 5 nm. A distortion of the anatase cell is detected (increase and decrease of a and c lattice parameters, respectively) with respect to the reported anatase bulk values. The room temperature hysteresis loops of the samples display the coexistence of paramagnetic and ferromagnetic contributions. An enhancement in the ferromagnetic component is observed upon Cr and N co-doping. The analysis of the temperature dependence of the magnetization confirms the coexistence of both para and ferromagnetic contributions. Although the existence of a secondary phase cannot be completely excluded in the (Cr,N)-doped sample with the highest nitrogen content, the results confirms the achievement of intrinsic room temperature ferromagnetism in these doped semiconductor nanostructures.

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Room-temperature ferromagnetism of Fe-doped TiO2 nanoparticles driven by oxygen vacancy

Cited by 63 publications

References 44 publications

Room temperature ferromagnetism in Cu2+ doped TiO2 nanocrystals: The impact of their size, shape and dopant concentration

Room temperature ferromagnetism in Cu2+ doped TiO2 nanocrystals: The impact of their size, shape and dopant concentration

Structural, optical and photodegradation properties of pure and Fe-doped titania nanoparticles probed using simulated Solar light

Magnetic Properties of N- and (Cr, N)-Doped TiO<sub>2</sub> Nanoparticles

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