PREPARATION AND INVESTIGATIONS OF STRUCTURAL, OPTICAL AND CONDUCTIVITY PROPERTIES OF POLYANILINE/TITANIUM DIOXIDE NANOCOMPOSITES

Abstract

Nanocomposites of polyaniline (PANI) encapsulating titanium dioxide (TiO2) nanoparticles (NPs) were prepared by in-situ polymerization method in the presence of TiO2 NPs. The prepared nanocomposites were analyzed by powder X-ray diffraction (PXRD), uv-visible absorption spectroscopy (UV), Fourier-transform infrared spectra (FTIR) and high resolution transmission electron microscope (HRTEM). An AC conductivity study of PANI/TiO2 nanocomposites was analyzing in between 1 Hz to 8 MHz and a particular temperature 500C. The P-XRD was explaining amorphous nature in PANI/TiO2 nanocomposites respectively. The particle size was observed and confirmed using HRTEM, which shows the formation of nanocomposites at around near in spherical shape in the nanoscale range. An FTIR study confirms the bonding and formation of the prepared samples. FTIR spectral obtained shows that TiO2 and PANI NPs are not simply encapsulated and a strong interaction obtain at the interface of PANI and TiO2 NPs. A UV- vis spectra was used to analysis the confined polymerization process of PANI doped TiO2. The UV absorption spectrum showed a blue shift as compared to the pure TiO2 NPs. AC conductivity measured indicates that the conductivity of PANI/TiO2 nanocomposites is decreased with TiO2 NPs. The AC conductivity of PANI/TiO2 nanocomposites has measured at a 146 S cm-1 . The AC conductivity property is obtained to be changed due to the combine of TiO2 NPs, which induced the formation of a coherent for charging transport in the base PANI chain.