Dielectric properties and electrical conductivity of the hybrid organic-inorganic polyvanadates (H{sub 3}N(CH{sub 2}){sub 4}NH{sub 3})[V{sub 6}O{sub 14}]

Journal Article · Fri Jun 15 00:00:00 EDT 2012 · Journal of Solid State Chemistry

DOI:https://doi.org/10.1016/J.JSSC.2012.02.013· OSTI ID:22012139

Nefzi, H ^[1]; Sediri, F ^[1]; Hamzaoui, H ^[2]; Gharbi, N ^[1]

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1. Laboratoire de Chimie de la Matiere Condensee IPEIT, Universite de Tunis, 2 rue Jawaher Lel Nehru 1008, BP 229 Montfleury Tunis (Tunisia)
2. Laboratoire des Materiaux,Technopole de Borj Cedria, BP 95 Hammam-Lif Tunisie (Tunisia)

Plate-like crystals of the polyvanadate (H{sub 3}N(CH{sub 2}){sub 4}NH{sub 3})[V{sub 6}O{sub 14}] have been synthesized via an hydrothermal treatment. X-ray powder diffraction, scanning electron microscope, Fourier transform infrared spectroscopy, electron spin resonance and complex impedance spectroscopy were used to analyze the hybrid material. The frequency dependence of AC conductivity at different temperatures indicates that the CBH model is the probable mechanism for the AC conduction behavior. The conductivity was measured by complex impedance spectroscopy which is equal to 31.10{sup -3} {Omega}{sup -1} m{sup -1} at 443 K. The Arrhenius diagram is not linear, it presents a rupture situated at 357 K and the activation energies' average values are 0.22 eV and 0.14 eV, deduced from the Arrhenius relation. - Graphical abstract: At high temperature {epsilon} Double-Prime increases more rapidly which is due to the increasing conduction loss which rises with the increment in the DC conductivity. Highlights: Black-Right-Pointing-Pointer Rectangular plate-like crystals (H{sub 3}N(CH{sub 2}){sub 4}NH{sub 3})[V{sub 6}O{sub 14}] were synthesized. Black-Right-Pointing-Pointer frequency and temperature dependence of AC conductivity indicate CBH model. Black-Right-Pointing-Pointer The temperature dependence of DC conductivity exhibits two conduction mechanisms.

• OSTI ID: 22012139
• Journal Information: Journal of Solid State Chemistry, Vol. . 190; Other Information: Copyright (c) 2012 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); ISSN 0022-4596
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
ACTIVATION ENERGY
CRYSTALS
DIELECTRIC PROPERTIES
ELECTRIC CONDUCTIVITY
ELECTRON SPIN RESONANCE
FOURIER TRANSFORM SPECTROMETERS
FREQUENCY DEPENDENCE
HYBRIDIZATION
SCANNING ELECTRON MICROSCOPY
SPECTROSCOPY
SYNTHESIS
TEMPERATURE DEPENDENCE
TEMPERATURE RANGE 0400-1000 K
X-RAY DIFFRACTION