Publication
Title
Polypyrrole-titania nanocomposites derived from different oxidants
Author
Abstract
Polypyrrole(PPy)/titania(TiO2) nanocomposites were prepared by an in situ oxidative polymerization method with two different oxidants, namely ammonium persulfate (APS) and ferric chloride. The effects of oxidant type and TiO2 particle loading level on the physiochemical properties of the PPy/TiO2 nanocomposites were investigated in details. The intermolecular interactions within the polymer nanocomposites were explored by attenuated total reflectance Fourier transform infrared spectroscopy (ATR-FTIR) and X-ray photoelectron spectroscopy (XPS). While scanning electron microscopy (SEM) was used to characterize surface morphology, transmission electron microscopy (TEM) revealed the well-dispersed TiO2 nanoparticles in the PPy matrix. The thermogravimetric analysis (TGA) revealed improved thermal stability of PPy with addition of the nanofillers. The nanocomposites prepared by APS oxidation exhibited lower electrical conductivity at room temperature than that of the PPy nanocomposites from FeCl3 oxidation polymerization. Both nanocomposites and pure PPy follow the three-dimensional variable range hopping (VRH) electron conduction mechanism. The frequency dependent dielectric constants of PPy/TiO2 nanocomposites were measured in the range of 20 Hz2 MHz.
Language
English
Source (journal)
Journal of the electrochemical society. - New York, N.Y.
Publication
New York, N.Y. : 2011
ISSN
0013-4651
Volume/pages
158:11(2011), p. 205-212
ISI
000295626000082
Full text (Publisher's DOI)
Full text (publisher's version - intranet only)
UAntwerpen
Faculty/Department
Publication type
Subject
External links
Web of Science
Record
Identification
Creation 19.07.2016
Last edited 17.09.2017