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A novel hydrogen peroxide sensor based on Ag nanoparticles decorated polyaniline/graphene composites
Author(s) -
Li Shan,
Xiong Jianxin,
Shen Jingsong,
Qin Yong,
Li Juan,
Chu Fuqiang,
Kong Yong,
Deng Linhong
Publication year - 2015
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.42409
Subject(s) - polyaniline , graphene , detection limit , hydrogen peroxide , materials science , horseradish peroxidase , nanoparticle , electrochemical gas sensor , selectivity , chemical engineering , electrochemistry , nanotechnology , composite material , catalysis , chemistry , polymer , electrode , organic chemistry , chromatography , polymerization , engineering , enzyme
A novel electrochemical sensor based on Ag nanoparticles (AgNPs) decorated polyaniline/graphene composites (PANI/G) is developed, which can be used for sensitive determination of H 2 O 2 . For the construction of the H 2 O 2 sensor, polyaniline (PANI) is first electrodeposited on the surface of graphene (G) to form PANI/G, and then horseradish peroxidase (HRP) loaded on AgNPs (HRP/AgNPs) is immobilized on to the PANI/G. H 2 O 2 can be catalyzed by HRP to generate current response which can be significantly enhanced by AgNPs, and thus the PANI/G based sensor can be utilized for the detection of H 2 O 2 . Under the optimized conditions, the proposed H 2 O 2 sensor exhibits wide linear response to H 2 O 2 concentration ranging from 0.25 to 2.25 m M with a detection limit of 0.03 m M (signal‐to‐noise ratio of 3), and it also shows high selectivity and reproducibility. The method is simple and cost‐effective, and can be a promising candidate as the sensitive sensing platform for H 2 O 2 . © 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015 , 132 , 42409.