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Noncovalent Assembly of Picket‐Fence Porphyrin on Carbon Nanotubes as Effective Peroxidase‐Like Catalysts for Detection of Hydrogen Peroxide in Beverages
Author(s) -
Li XiaoRong,
Wang Bo,
Xu JingJuan,
Chen HongYuan
Publication year - 2011
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.201100552
Subject(s) - porphyrin , hydrogen peroxide , carbon nanotube , amperometry , detection limit , electrochemistry , electrochemical gas sensor , catalysis , chemistry , chemical engineering , materials science , photochemistry , nanotechnology , organic chemistry , chromatography , electrode , engineering
A newly developed electrochemical sensor for determination of hydrogen peroxide (H 2 O 2 ) in beverages using a water‐insoluble picket‐fence porphyrin (FeTpivPP) functionalized multiwalled carbon nanotubes (MWNTs) is demonstrated. Introduction of FeTpivPP on MWNTs led to enhanced electron transfer. As a new platform in electrochemical analysis, the resultant sensor showed excellent electrocatalytic activity toward the reduction of H 2 O 2 due to the synergic effect between MWNTs and FeTpivPP, thus leading to highly sensitive amperometric sensing of H 2 O 2 with a detection limit of 0.05 µmol L −1 . The developed method is successfully used to detect H 2 O 2 in beverages and shows great promise for routine sensing applications.