TITLE:
Synthesis and Characterization of CuO Nanoparticles and CuO Doped PVA Nanocomposites
AUTHORS:
Alabur Manjunath, Mohammed Irfan, Kabbinadavamsha Prasannakumar Anushree, Kuruba Mahesha Vinutha, Narasimhappa Yamunarani
KEYWORDS:
Nanocomposites, AC Conductivity, Dielectric Constant, XRD, UV-Analysis, FTIR
JOURNAL NAME:
Advances in Materials Physics and Chemistry,
Vol.6 No.10,
October
19,
2016
ABSTRACT: CuO nanoparticles were synthesized by aqueous
precipitation method and CuO doped PVA nanocomposites (1 wt, 2 wt, 3 wt, 4 wt
and 5 wt) were prepared by solution casting method. The pellets of CuO
nanoparticles and films of CuO doped PVA nanocomposites were used for
electrical studies in the frequency range of 50 Hz to 5 MHz and in the
temperature range of 303 to 338 K. The dielectric constant decreases while the
AC electrical conductivity increases with increasing frequency and also with increase
in temperature. XRD study confirms the crystalline nature of CuO nanoparticles
and the average crystallite size is found to be around 8 nm. The peak widths in
XRD pattern of PVA-CuO nanocomposites are broadened by incremental addition of
CuO nanomaterials which implies an increase in the amorphous character of
PVA-CuO nanocomposites that result in greater ionic diffusivity and high ionic
conductivity. It is clear from UV-Vis spectral analysis that, increase in CuO
concentration decreases the optical band gap from 4.978 eV to 3.03 eV. The FTIR
(3700 - 650 cm-1)
spectra of nanocomposite films are observed with changes by the addition of CuO
nanomaterials.