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.
Structural properties, electric impedance, electric modulus and dielectric spectra properties have been used to investigate a Polyaniline/Manganese dioxide (PANI /MnO2) nanocomposites prepared by in situ polymerization method. Prepared nanocomposites were analyzed by AC impedance spectroscopy. Pure PANI and MnO2 nanoparticles have good crystalline nature, but when it was prepared to nanocomposites, crystalline nature could be change. When the concentration of MnO2 nanoparticles has increased in nanocomposites, crystalline behaviour has been increases. Impedance studies were used to explain the electrode process. The modulus data of nanocomposites were analyzed as a function of different frequency range at a particular temperature. At low-frequency range, all the values of a real part of the electric modulus remain almost near to zero. Dielectric constant and dielectric loss have explained in brief. The impedance analysis was confirming the non-debye nature of the materials
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