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Solid‐state synthesis and characterization of polyaniline/nano‐TiO 2 composite
Author(s) -
Abdiryim Tursun,
Ubul Aminam,
Jamal Ruxangul,
Tian Yuchuan,
Awut Tunsagul,
Nurulla Ismayil
Publication year - 2012
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.36857
Subject(s) - materials science , polyaniline , fourier transform infrared spectroscopy , cyclic voltammetry , scanning electron microscope , composite material , composite number , dielectric spectroscopy , transmission electron microscopy , electrochemistry , chemical engineering , electrode , nanotechnology , chemistry , polymer , engineering , polymerization
Polyaniline/nano‐TiO 2 composites with the content of nano‐TiO 2 varying from 6.2 wt % to 24.1 wt % were prepared by using solid‐state synthesis method at room temperature. The structure and morphology of the composites were characterized by the Fourier transform infrared (FTIR) spectra, ultraviolet‐visible (UV–vis) absorption spectra, X‐ray diffraction (XRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). The electrochemical performances of the composites were investigated by galvanostatic charge–discharge measurement, cyclic voltammetry (CV), and electrochemical impedance spectroscopy (EIS). The results from FTIR and UV–vis spectra showed that the composites displayed higher oxidation and doping degree than pure PANI. The XRD and morphological studies revealed that the inclusion of nano‐TiO 2 particles hampered the crystallization of PANI chains in composites, and the composites exhibited mixed particles from free PANI particles and the nano‐TiO 2 entrapped PANI particles. The galvanostatic charge–discharge measurements indicated that the PANI/nano‐TiO 2 composites had higher specific capacitances than PANI. The composite with 6.2 wt % TiO 2 had the highest specific capacitance among the composites. The further electrochemical tests on the composite electrode with 6.2 wt % TiO 2 showed that the composite displayed an ideal capacitive behavior and good rate ability. © 2012 Wiley Periodicals, Inc. J Appl Polym Sci, 2012