Synthesis and characterization of polypyrrole/H-Beta zeolite nanocomposites

A1 Journal article (refereed)

Internal Authors/Editors

Publication Details

List of Authors: Kai Yu, Narendra Kumar, Jorma Roine, Markus Pesonen, Ari Ivaska
Publisher: The Royal Society of Chemistry
Publication year: 2014
Journal: RSC Advances
Volume number: 4
Issue number: 62
Start page: 33120
End page: 33126
eISSN: 2046-2069


Different amounts of polypyrrole (PPy) were synthesized in aqueous solution on zeolite frameworks by chemical oxidation using FeCl3 as the oxidizing agent at ambient temperature (22 +/- 1 [degree]C). The proton form of BEA zeolites with SiO2/Al2O3 ratios of 25{,} 150 and 300 were used as the host for PPy in this study. Both the anionic groups in the zeolite structures and the chloride ions from the oxidant functioned as the dopants during the polymerization. For comparison{,} parallel experiments were carried out with only purified pyrrole and FeCl3 in water solution in order to obtain the bulk PPy powder. The nitrogen adsorption-desorption technique{,} X-ray diffraction (XRD){,} scanning electron microscopy (SEM){,} transmission electron microscopy (TEM) and Fourier transform infrared spectroscopy with attenuated total reflectance (FTIR-ATR) were used to characterize the composites. PPy was formed both in the inner and outer surface of the zeolite structures. The composites showed electrical conductivity at ambient temperature in the range from 6.2 [times] 10-6 to 1.3 S cm-1 depending on the ratio between pyrrole and H-Beta zeolite. Electrochemical behavior of the synthesized samples was investigated by cyclic voltammetry.

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