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Enzymatic Synthesis of Polyaniline/Graphite Oxide Nanocomposites

Published online by Cambridge University Press:  03 October 2012

C. Guerrero-Bermea ,
S. Sepulveda-Guzman  and
R. Cruz-Silva
C. Guerrero-Bermea
Affiliation:
FIME-CIIDIT Universidad Autónoma de Nuevo León, Monterrey NL, MX
S. Sepulveda-Guzman
Affiliation:
FIME-CIIDIT Universidad Autónoma de Nuevo León, Monterrey NL, MX
R. Cruz-Silva
Affiliation:
Research Center for Exotic Nanocarbons, Shinshu University, Nagano, JP
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Abstract

In this work, we prepared graphite oxide (GO)/polyaniline nanocomposites by enzymatic polymerization of aniline in an aqueous dispersion of graphite oxide. Two GO dispersions with sheets having an average lateral size of 12.50 μm and 247 nm were used. The enzymatic polymerization was carried out in aqueous acidic medium using toluenesulfonic acid (TSA) as doping agent, horseradish peroxide (HRP) as catalyst, and hydrogen peroxide as oxidizer. The polymerization reaction was studied using 1.0, 2.5 and 5 wt % of GO and nGO dispersions. No changes were observed in the catalytic activity of the peroxidase during the enzymatic synthesis due to the additionof GO sheets. Scanning electron microscopy images show that PANI colloids were attached on GO sheets. The PANI-GO colloids were characterized by ultraviolet–visible spectroscopy and Fourier transformed infrared spectroscopy, whereas their colloidal stability was evaluated at different pHs. The UV-vis spectroscopy study revealed that GO affects the electronic conjugation of PANI modifying its absorption spectrum.

Keywords

compositescanning electron microscopy (SEM)polymerization
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1448: Symposium Z – Conjugated Organic Materials for Energy Conversion, Energy Storage and Charge Transport , 2012 , mrss12-1448-z11-08
Copyright
Copyright © Materials Research Society 2012

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