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Preparation, Characterization and Magnetic Properties of PANI/La‐substituted LiNi Ferrite Nanocomposites
Author(s) -
Jiang Jing,
Li LiangChao,
Xu Feng
Publication year - 2006
Publication title -
chinese journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.28
H-Index - 41
eISSN - 1614-7065
pISSN - 1001-604X
DOI - 10.1002/cjoc.200690338
Subject(s) - nanocomposite , coercivity , fourier transform infrared spectroscopy , ferrite (magnet) , scanning electron microscope , transmission electron microscopy , chemistry , polyaniline , infrared spectroscopy , chemical engineering , polymerization , aqueous solution , magnetic hysteresis , analytical chemistry (journal) , magnetization , nuclear chemistry , materials science , polymer , nanotechnology , composite material , magnetic field , organic chemistry , physics , engineering , condensed matter physics , quantum mechanics
Magnetic nanocomposites containing polyaniline (PANI)‐coated La‐substituted LiNi ferrite (LiNi 0.5 La 0.02 Fe 1.98 O 4 ) were synthesized by in situ polymerization in aqueous solution of hydrochloric acid. The nanocomposites exhibited the magnetic hysteresis nature under applied magnetic field. The saturation magnetization ( M S ) and coercivity ( H C ) varied with the ferrite content. The obtained nanocomposites were characterized by X‐ray diffraction (XRD), transmission electron microscopy (TEM), scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FT‐IR), UV‐Visible spectroscopy and vibrating sample magnetometer (VSM). TEM and SEM studies showed that the nanocomposites present the core‐shell structure. The results of XRD patterns, FT‐IR and UV‐Visible spectra indicated the formation of PANI‐LiNi 0.5 La 0.02 Fe 1.98 O 4 nanocomposites and showed that the interaction existed between PANI backbone and ferrite particles in the nanocomposites. The bonding mechanism in the nanocomposites has been proposed.