Preparation of a porous composite film for the fabrication of a hydrogen peroxide sensor

Mu Yi Hua; Chun Jen Chen; Hsiao Chien Chen; Rung Ywan Tsai; Wen Cheng; Chun Lin Cheng; Yin Chih Liu

doi:10.3390/s110605873

Preparation of a porous composite film for the fabrication of a hydrogen peroxide sensor

Mu Yi Hua, Chun Jen Chen, Hsiao Chien Chen, Rung Ywan Tsai, Wen Cheng, Chun Lin Cheng, Yin Chih Liu

Center of Applied Nanomedicine

Research output: Contribution to journal › Article › peer-review

23 Citations (Scopus)

Abstract

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.

Original language	English
Pages (from-to)	5873-5885
Number of pages	13
Journal	Sensors
Volume	11
Issue number	6
DOIs	https://doi.org/10.3390/s110605873
Publication status	Published - 2011 Jun

All Science Journal Classification (ASJC) codes

Analytical Chemistry
Atomic and Molecular Physics, and Optics
Biochemistry
Instrumentation
Electrical and Electronic Engineering

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10.3390/s110605873

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title = "Preparation of a porous composite film for the fabrication of a hydrogen peroxide sensor",

abstract = "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.",

author = "Hua, {Mu Yi} and Chen, {Chun Jen} and Chen, {Hsiao Chien} and Tsai, {Rung Ywan} and Wen Cheng and Cheng, {Chun Lin} and Liu, {Yin Chih}",

year = "2011",

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doi = "10.3390/s110605873",

language = "English",

volume = "11",

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AU - Hua, Mu Yi

AU - Chen, Chun Jen

AU - Chen, Hsiao Chien

AU - Tsai, Rung Ywan

AU - Cheng, Wen

AU - Cheng, Chun Lin

AU - Liu, Yin Chih

PY - 2011/6

Y1 - 2011/6

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AB - 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.

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Preparation of a porous composite film for the fabrication of a hydrogen peroxide sensor

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