Single Step In Situ Synthesis and Optical Properties of Polyaniline/ZnO Nanocomposites

Abstract

Polyaniline/ZnO nanocomposites were prepared by in situ oxidative polymerization of aniline monomer in the presence of different weight percentages of ZnO nanostructures. The steric stabilizer added to prevent the agglomeration of nanostructures in the polymer matrix was found to affect the final properties of the nanocomposite. ZnO nanostructures of various morphologies and sizes were prepared in the absence and presence of sodium lauryl sulphate (SLS) surfactant under different reaction conditions like in the presence of microwave radiation (microwave oven), under pressure (autoclave), under vacuum (vacuum oven), and at room temperature (ambient condition). The conductivity of these synthesized nanocomposites was evaluated using two-probe method and the effect of concentration of ZnO nanostructures on conductivity was observed. X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FTIR), and UV-visible (UV-VIS) spectroscopy techniques were used to characterize nanocomposites. The optical energy band gap of the nanocomposites was calculated from absorption spectra and ranged between 1.5 and 3.21 eV. The reported values depicted the blue shift in nanocomposites as compared to the band gap energies of synthesized ZnO nanostructures. The present work focuses on the one-step synthesis and potential use of PANI/ZnO nanocomposite in molecular electronics as well as in optical devices.

Facile synthesis of an electrically conductive polycarbazole–zirconium(iv)phosphate cation exchange nanocomposite and its room temperature ammonia sensing performance

“…This interaction may be the possible reason for the slight shifting of peaks of PCz and ZrP in the PCz-ZrP cation exchange nanocomposite. A similar peak shift has also been reported by Sharma et al, 26 who attributed the peak shift to the interaction between polyaniline and ZnO for their polyaniline/ZnO nanocomposite system.…”

“…shows the XRD patterns of PCz, ZrP and PCz-ZrP cation exchange nanocomposite. Similar peak shift has also been reported by Sharma et al[26], who attributed the peak shift to the interaction between polyaniline and ZnO for their polyaniline/ZnO nanocomposite system. PCz-ZrP nanocomposite on the other hand showed peaks corresponding to both PCz and ZrP suggesting the presence of both the constituents.…”

Fabrication of chitosan/Ag-nanoparticles/clay nanocomposites for catalytic control on oxidative polymerization of aniline

“…Conducting polyanilines have increasing scientific and technological interest in the synthesis of a broad variety of promising new materials due to their unique electrical, optical and optoelectrical properties as well as the ease of preparation and environmental stability [18]. The most common method for polyanline synthesis is the oxidative 6 polymerization using an oxidizing agent in aqueous acidic medium [19]. Auto acceleration using organic and inorganic fillers is also studied.…”

Polyaniline/zinc oxide nanocomposite as room‐temperature sensing layer for methane

“…In addition, the peaks related to the bipolaron structure of the nanocomposites appeared at ∼1288 cm −1 . The appearance of these bands at a lower frequency for the PANI/HS/ZnO nanocomposites suggests interaction between PANI and the ZnO nanoparticles . Further, the absorption bands at 3,726 and 2,985 cm −1 are associated with NH and CH stretching vibrations, respectively, while the band at 833 cm −1 corresponds to the aromatic out‐of‐plane CH bending vibration.…”