Preparation and characterization of conductive polyaniline/cerium dioxide composites

摘要

Conductive polyaniline/cerium dioxide (PANI/CeO_) composites have been synthesized by in-situ polymerization of aniline in the presence of CeO_2 nanoparticles. The structure and thermal stability of obtained composites were characterized by Fourier-transform infrared spectra (FTIR), Fourier-transform Raman spectra (FT-Raman), X-ray diffraction (XRD) and thermogravimetric analysis (TGA). The results showed that PANI and CeO_2 nanoparticles were not simply blended, and a strong interaction existed at the interface of CeO2 and PANI. In the PANI/CeO_2 composite, the degree crystallinity of PANI increased and diffraction pattern of CeO_2 was amorphous. And that the composites were more thermally stable than that of the pure PANI. Electrical conductivity measurements indicated that the conductivity of PANI/CeO_2 composites was much higher than that of the pure PANI and the maximum conductivity obtained was 11.68 S/cm at 17.5 wt% of CeO_2.