Magnetic Resonance Study of Nickel and Nitrogen Co-modified Titanium Dioxide Nanocomposites

Guskos, N.; Żołnierkiewicz, G.; Guskos, Aleksander; Typek, J.; Berczyński, Paweł; Dolat, D.; Mozia, Sylwia; Morawski, A. W.

doi:10.1007/978-94-017-9005-5_4

Cited by 6 publications

(2 citation statements)

References 35 publications

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“…The measurements were performed in the 4 K to 290 K temperature range using an Oxford helium flow cryostat. Such spectrum is typical of the previously registered ones from strongly correlated spin system of agglomerated nanoparticles [29][30][31][32]. Additionally, EPR signal (a narrow line at the magnetic field corresponding to g-factor ∼2) attributed to isolated trivalent titanium ions was identified at low temperatures.…”

Section: Methodssupporting

confidence: 71%

Temperature study of magnetic resonance spectra of co-modified (Co,N)-TiO₂nanocomposites

Guskos¹,

Typek

Żołnierkiewicz

et al. 2016

Materials Science-Poland

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The (nCo,N)-TiO 2 (n = 1, 5 and 10 wt.% of Co) nanocomposites were investigated by magnetic resonance spectroscopy in 4 K to 290 K range. Analyses of ferromagnetic/electron paramagnetic resonance (FMR/EPR) spectra in terms of four Callen lineshape components revealed the existence of two types of magnetic centers, one derived from metallic cobalt nanoparticles in superparamagnetic (SPM) phase and the other from cobalt clusters in the TiO 2 lattice. Additionally, at low temperature the EPR spectrum arising from Ti 3+ ions was also registered. Both relaxations of the Landau-Lifshitz type and the Bloch-Bloembergen type played an important role at high temperature in determining the linewidths and the latter relaxation was prevailing at low temperature. Analysis of the integrated intensity showed that the SPM signal is due to small size FM cobalt nanoparticles while the paramagnetic signal from Co clusters originates from those nanoparticles in which the concentration of magnetic polarons is below the percolation threshold.

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Section: Methodssupporting

confidence: 71%

Temperature study of magnetic resonance spectra of co-modified (Co,N)-TiO₂nanocomposites

Guskos¹,

Typek

Żołnierkiewicz

et al. 2016

Materials Science-Poland

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“…Localized magnetic moments of the agglomerates and their concentration have a dominant infl uence on these properties and ferromagnetic resonance (FMR)/electron paramagnetic resonance (EPR) spectroscopy could help to understand magnetic interactions [19][20][21][22][23][24][25][26][27][28][29][30]. In previous work investigation of the temperature dependence of the FMR/EPR spectra of co-modifi ed systems nM,N--TiO 2 (where n = 1, 5, 10 wt%, M = Fe, Ni) has been carried out [19,30]. Measurements have shown that these are complex magnetic systems and thus improved understanding of their magnetism requires further investigations that in turn will optimize and expand their potential applications.…”

Section: Introductionmentioning

confidence: 99%

Magnetic resonance study of co-modified (Co,N)-TiO₂ nanocomposites

et al. 2015

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Abstract. Three nCo,N-TiO 2 nanocomposites (where cobalt concentration index n = 1, 5 and 10 wt %) were prepared and investigated by magnetic resonance spectroscopy at room temperature. Ferromagnetic resonance (FMR) lines of magnetic cobalt agglomerated nanoparticle were dominant in all registered spectra. The relaxation processes and magnetic anisotropy of the investigated spin system essentially depended on the concentration of cobalt ions. It is suggested that the samples contained two magnetic types of sublattices forming a strongly correlated spin system. It is suggested that the existence of strongly correlated magnetic system has an essential infl uence of the photocatalytic properties of the studied nanocomposites.

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Influence of pH of sol-gel solution on phase composition and photocatalytic activity of TiO 2 under UV and visible light

Tryba

Tygielska

Colbeau‐Justin

et al. 2016

Materials Research Bulletin

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Magnetic Resonance Study of Nickel and Nitrogen Co-modified Titanium Dioxide Nanocomposites

Cited by 6 publications

References 35 publications

Temperature study of magnetic resonance spectra of co-modified (Co,N)-TiO₂nanocomposites

Temperature study of magnetic resonance spectra of co-modified (Co,N)-TiO₂nanocomposites

Magnetic resonance study of co-modified (Co,N)-TiO₂ nanocomposites

Influence of pH of sol-gel solution on phase composition and photocatalytic activity of TiO 2 under UV and visible light

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Magnetic Resonance Study of Nickel and Nitrogen Co-modified Titanium Dioxide Nanocomposites

Cited by 6 publications

References 35 publications

Temperature study of magnetic resonance spectra of co-modified (Co,N)-TiO2nanocomposites

Temperature study of magnetic resonance spectra of co-modified (Co,N)-TiO2nanocomposites

Magnetic resonance study of co-modified (Co,N)-TiO2 nanocomposites

Influence of pH of sol-gel solution on phase composition and photocatalytic activity of TiO 2 under UV and visible light

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Product

Resources

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Temperature study of magnetic resonance spectra of co-modified (Co,N)-TiO₂nanocomposites

Temperature study of magnetic resonance spectra of co-modified (Co,N)-TiO₂nanocomposites

Magnetic resonance study of co-modified (Co,N)-TiO₂ nanocomposites