International Journal of Physics and Astronomy

Dopant Effect and Characterization of Poly (O-Toluidine)/Vanadium Pentoxide Composites Prepared by in Situ Polymerization Process
Shama Islam, Mohsin Ganaie, Shabir Ahmad, Azher M. Siddiqui, M. Zulfequar

Abstract
Conducting polymer composites of poly o-toluidine/vanadium pentoxide (POT/V₂O₅) were synthesized by polymerization of o-toluidine with V₂O₅ using (NH₄)₂ S₂O₈) as an oxidant. The V₂O₅ is varied in five different weight percentages of POT in POT/V₂O₅ composites. The synthesized polymer composites are characterized by dc conductivity; UV–Visible absorption spectroscopy, FTIR, Phototluminescence and XRD techniques. Electrical conductivity of the compressed pellets depends on the concentration of V₂O₅ in POT. The optical band gap of composites decreases with increase in the weight percent of V₂O₅. X-ray diffraction pattern shows increases in the crystallinity which is due to interaction of POT with V₂O₅. The PL emission intensity of all the polymer/V₂O₅ composites makes them suitable for various optoelectronic devices.

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