Polyol synthesis of (polyvinylpyrrolidone) PVP–Mn3O4 nanocomposite

Baykal, A.; Bitrak, N.; Ünal, B.; Kavas, H.; Durmuș, Z.; Özden, Şehmus; Toprak, Muhammet S.

doi:10.1016/j.jallcom.2010.04.143

Cited by 58 publications

(22 citation statements)

References 33 publications

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“…In other word, it was observed that the con- ductivity values of nanocomposite are nearly the same beyond 150 kHz, independent of temperature while exhibiting a temperature-dependent behavior at low frequencies. This phenomenon can be considered as a strong clue for ionic conductivity [33,34]. In addition, ac conductivity of the samples over a certain frequency obeyed the rule of the temperature independent expression for several low mobility polymers and even for crystalline materials, non-crystalline and liquid semiconductors;…”

Section: Conductivity and Permitivity Measurementsmentioning

confidence: 80%

Triethylene Glycol Stabilized CoFe2O4 Nanoparticles

Baykal

Deligöz

Sözeri

et al. 2012

J Supercond Nov Magn

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We report on the synthesis and detailed composition, thermal, micro-structural, ac-dc conductivity performance and dielectric permittivity characterization of triethylene glycol (TREG) stabilized CoFe 2 O 4 nanoparticles synthesized by polyol method. XRD analysis confirmed the inorganic phase as CoFe 2 O 4 with high phase purity. Microstructure analysis with TEM revealed well separated, spherical nanoparticles in the order of 6 nm, which is also confirmed by X-ray line profile fitting. FT-IR analysis confirms that TREG is successfully coated on the surface of nanoparticles. Overall conductivity of nanocomposite is approximately two magnitudes lower than that of TREG with increase in temperature. The ac conductivity showed a temperature dependent behavior at low frequencies and temperature independent behavior at high frequencies which is an indication of ionic conductivity. The dc conductivity of the nanocomposites and pure TREG are found to obey the Ar-A. Baykal ( ) · Z. Durmus rhenius plot with dc activation energies of 0.258 eV and 0.132 eV, respectively. Analysis of dielectric permittivity functions suggests that ionic and polymer segmental motions are strongly coupled in the nanocomposite. TREG stabilized CoFe 2 O 4 nanoparticles has lower ε and ε than that of pure TREG due to the doping of cobalt. As the temperature increases, the frequency at which (ε ) reaches a maximum shifted towards higher frequencies. On the other hand, the activation energy of TREG for relaxation process was found to be 0.952 eV which indicates the predominance of electronic conduction due to the chemical nature of TREG. Contrarily, no maximum peak of tan δ was observed for the nanocomposite due to the being out of temperature and frequency range applied in the study.

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Section: Conductivity and Permitivity Measurementsmentioning

confidence: 80%

Triethylene Glycol Stabilized CoFe2O4 Nanoparticles

Baykal

Deligöz

Sözeri

et al. 2012

J Supercond Nov Magn

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“…At higher frequencies (>10 3 Hz), the variation of conductivity becomes less sensitive to temperatures whereas it shows a relatively frequencydependent behavior. This phenomenon may be taken as a significant evidence for ionic conductivity [41]. With increasing temperature, mobility of the charge carrier increases which results in a substantial enhancement in ac conductivity [42].…”

Section: Mössbauer Analysismentioning

confidence: 92%

Synthesis and magneto-electrical properties of MFe2O4 (Co, Zn) nanoparticles by oleylamine route

Kurtan

Erdemi

Baykal

et al. 2016

Ceramics International

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“…For spinels, vibrations of ions in the crystal lattice are usually observed in the range 1000-400 cm −1 [23]. The highest one, ν 1 , generally observed in the range 600-500 cm −1 , corresponds to intrinsic stretching vibrations of the metal at the tetrahedral site, M tetra ↔ O, whereas the ν 2 -lowest band, usually observed in the range 450-385 cm −1 , is assigned to octahedralmetal stretching, M octa ↔ O [22,[24][25][26][27][28][29][30][31][32][33][34][35]. Bands at 1575, 1460 cm −1 indicated the stretching vibration of C-N in imidazolium string and also the peaks located around 3167, 3118, and 2966, 2940, 2877 cm −1 are ascribed to the C-H in the imidazolium ring and C-H in the alkyl chain [36] which indicate the presence of IL on the surface of Mn 3 O 4 NPs.…”

Section: Ft-ir Analysismentioning

confidence: 99%

A Green Chemical Synthesis and Characterization of Mn3O4 nanoparticles

Günay

Baykal

Toprak

et al. 2012

J Supercond Nov Magn

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Mn 3 O 4 nanoparticles were synthesized via an ionic liquid (IL) assisted process at room temperature, which is rather difficult to achieve by other techniques. The synthesized product was characterized by powder X-ray diffraction (XRD), transmission electron microscopy (TEM), Fourier transform infrared (FT-IR) spectroscopy, thermal gravimetry (TG), and vibrating sample magnetometry (VSM). The prepared material showed a high purity, while crystallite size and particle size agree well with each other, 17 ± 2 and 19 ± 3 nm, respectively, revealing nearly single crystalline character of nanoparticles. The product contains 4 wt% of adsorbed water and ionic liquid. This method provides a facile, one-step, and low-cost route for the synthesis of nanostructures of metal oxides. In addition, [BMIM]BF 4 could be collected and reused for subsequent reactions.

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Polyol synthesis of (polyvinylpyrrolidone) PVP–Mn3O4 nanocomposite

Cited by 58 publications

References 33 publications

Triethylene Glycol Stabilized CoFe2O4 Nanoparticles

Triethylene Glycol Stabilized CoFe2O4 Nanoparticles

Synthesis and magneto-electrical properties of MFe2O4 (Co, Zn) nanoparticles by oleylamine route

A Green Chemical Synthesis and Characterization of Mn3O4 nanoparticles

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