Premium
Ferromagnetic polyaniline/TiO 2 nanocomposites
Author(s) -
Radoičić Marija,
Šaponjić Zoran,
ĆirićMarjanović Gordana,
Konstantinović Zorica,
Mitrić Miodrag,
Nedeljković Jovan
Publication year - 2012
Publication title -
polymer composites
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.577
H-Index - 82
eISSN - 1548-0569
pISSN - 0272-8397
DOI - 10.1002/pc.22278
Subject(s) - materials science , polyaniline , nanocomposite , raman spectroscopy , fourier transform infrared spectroscopy , aniline , chemical engineering , polymerization , coercivity , anatase , aqueous solution , magnetization , composite material , photocatalysis , polymer , organic chemistry , chemistry , physics , condensed matter physics , quantum mechanics , optics , engineering , catalysis , magnetic field
Abstract Novel ferromagnetic semiconducting polyaniline PANI/TiO 2 nanocomposites were synthesized by the oxidative polymerization of aniline with ammonium peroxydisulfate in an aqueous medium, in the presence of colloidal TiO 2 nanoparticles ( d ∼ 4.5 nm), without added acid. The morphological, magnetic, structural, and optical properties of the PANI/TiO 2 nanocomposites prepared at initial aniline/TiO 2 mole ratios 80, 40, and 20 were studied by scanning electron microscopy, superconducting quantum interference device, X‐ray powder diffraction, FTIR, Raman, and UV‐Vis spectroscopies. The emeraldine salt form of linear PANI chains as well as the presence of phenazine units, branched PANI chains, and anatase crystalline structure of TiO 2 in PANI/TiO 2 nanocomposites was confirmed by FTIR and Raman spectroscopies. The electrical conductivity of synthesized composites was ∼10 −3 S cm −1 . The room temperature ferromagnetic response with coercive field of H c ∼ 300 Oe and the remanent magnetization of M r ∼ 4.35 × 10 −4 emu/g was detected in all investigated PANI/TiO 2 nanocomposites. POLYM. COMPOS., 2012. © 2012 Society of Plastics Engineers