Preparation of a Porous Composite Film for the Fabrication of a Hydrogen Peroxide Sensor

A series of dopant-type polyaniline-polyacrylic acid composite (PAn-PAA) films with porous structures were prepared and developed for an enzyme-free hydrogen peroxide (H2O2) sensor. The composite films were highly electroactive in a neutral environment as compared to polyaniline (PAn). In addition,...

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Main Authors:	Hua, Mu-Yi, Chen, Chun-Jen, Chen, Hsiao-Chien, Tsai, Rung-Ywan, Cheng, Wen, Cheng, Chun-Lin, Liu, Yin-Chih
Format:	Online
Language:	English
Published:	Molecular Diversity Preservation International (MDPI) 2011
Online Access:	https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3231461/

id	pubmed-3231461
recordtype	oai_dc
spelling	pubmed-32314612011-12-07 Preparation of a Porous Composite Film for the Fabrication of a Hydrogen Peroxide Sensor Hua, Mu-Yi Chen, Chun-Jen Chen, Hsiao-Chien Tsai, Rung-Ywan Cheng, Wen Cheng, Chun-Lin Liu, Yin-Chih Article A series of dopant-type polyaniline-polyacrylic acid composite (PAn-PAA) films with porous structures were prepared and developed for an enzyme-free hydrogen peroxide (H2O2) sensor. The composite films were highly electroactive in a neutral environment as compared to polyaniline (PAn). In addition, the carboxyl group of the PAA was found to react with H2O2 to form peroxy acid groups, and the peroxy acid could further oxidize the imine structure of PAn to form N-oxides. The N-oxides reverted to their original form via electrochemical reduction and increased the reduction current. Based on this result, PAn-PAA was used to modify a gold electrode (PAn-PAA/Au) as a working electrode for the non-enzymatic detection of H2O2. The characteristics of the proposed sensors could be tuned by the PAA/PAn molar ratio. Blending PAA with PAn enhanced the surface area, electrocatalytic activity, and conductivity of these sensors. Under optimal conditions, the linear concentration range of the H2O2 sensor was 0.04 to 12 mM with a sensitivity of 417.5 μA/mM-cm2. This enzyme-free H2O2 sensor also exhibited a rapid response time, excellent stability, and high selectivity. Molecular Diversity Preservation International (MDPI) 2011-05-31 /pmc/articles/PMC3231461/ /pubmed/22163932 http://dx.doi.org/10.3390/s110605873 Text en © 2011 by the authors; licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution license (http://creativecommons.org/licenses/by/3.0/).
repository_type	Open Access Journal
institution_category	Foreign Institution
institution	US National Center for Biotechnology Information
building	NCBI PubMed
collection	Online Access
language	English
format	Online
author	Hua, Mu-Yi Chen, Chun-Jen Chen, Hsiao-Chien Tsai, Rung-Ywan Cheng, Wen Cheng, Chun-Lin Liu, Yin-Chih
spellingShingle	Hua, Mu-Yi Chen, Chun-Jen Chen, Hsiao-Chien Tsai, Rung-Ywan Cheng, Wen Cheng, Chun-Lin Liu, Yin-Chih Preparation of a Porous Composite Film for the Fabrication of a Hydrogen Peroxide Sensor
author_facet	Hua, Mu-Yi Chen, Chun-Jen Chen, Hsiao-Chien Tsai, Rung-Ywan Cheng, Wen Cheng, Chun-Lin Liu, Yin-Chih
author_sort	Hua, Mu-Yi
title	Preparation of a Porous Composite Film for the Fabrication of a Hydrogen Peroxide Sensor
title_short	Preparation of a Porous Composite Film for the Fabrication of a Hydrogen Peroxide Sensor
title_full	Preparation of a Porous Composite Film for the Fabrication of a Hydrogen Peroxide Sensor
title_fullStr	Preparation of a Porous Composite Film for the Fabrication of a Hydrogen Peroxide Sensor
title_full_unstemmed	Preparation of a Porous Composite Film for the Fabrication of a Hydrogen Peroxide Sensor
title_sort	preparation of a porous composite film for the fabrication of a hydrogen peroxide sensor
description	A series of dopant-type polyaniline-polyacrylic acid composite (PAn-PAA) films with porous structures were prepared and developed for an enzyme-free hydrogen peroxide (H2O2) sensor. The composite films were highly electroactive in a neutral environment as compared to polyaniline (PAn). In addition, the carboxyl group of the PAA was found to react with H2O2 to form peroxy acid groups, and the peroxy acid could further oxidize the imine structure of PAn to form N-oxides. The N-oxides reverted to their original form via electrochemical reduction and increased the reduction current. Based on this result, PAn-PAA was used to modify a gold electrode (PAn-PAA/Au) as a working electrode for the non-enzymatic detection of H2O2. The characteristics of the proposed sensors could be tuned by the PAA/PAn molar ratio. Blending PAA with PAn enhanced the surface area, electrocatalytic activity, and conductivity of these sensors. Under optimal conditions, the linear concentration range of the H2O2 sensor was 0.04 to 12 mM with a sensitivity of 417.5 μA/mM-cm2. This enzyme-free H2O2 sensor also exhibited a rapid response time, excellent stability, and high selectivity.
publisher	Molecular Diversity Preservation International (MDPI)
publishDate	2011
url	https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3231461/
_version_	1611492212199129088

Preparation of a Porous Composite Film for the Fabrication of a Hydrogen Peroxide Sensor

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