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A Novel Hydrogen Peroxide Amperometric Sensor based on Thionin Incorporated onto a Mo 6 S 9‐ x I x Nanowire Modified Glassy Carbon Electrode
Author(s) -
Lin Hong,
Cheng Huiming,
Miao Xiaopei,
Papakonstantinou Pagona,
Mihailovič Dragan,
Li Meixian
Publication year - 2009
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.200900162
Subject(s) - amperometry , nanowire , hydrogen peroxide , materials science , substrate (aquarium) , electrocatalyst , electrochemistry , nanomaterials , analytical chemistry (journal) , redox , nanotechnology , electrode , chemistry , organic chemistry , oceanography , geology , metallurgy
Abstract A simple and enzymeless amperometric sensor for the detection of H 2 O 2 based on a new kind of nanomaterial Mo 6 S 9− x I x (MoSI) nanowires (NWs) was developed. The construction of the sensing platform was based on strong electrostatic interactions between negatively charged MoSI NWs and positively charged thionin molecules. MoSI NWs act as not only a good substrate for the immobilization of redox mediator thionin, but also a promoter for electrocatalysis of H 2 O 2 . The fabricated sensor showed a wide linear range over the concentration of H 2 O 2 from 5 μM to 2.8 mM with a measurable lowest detection of 0.8 μM; furthermore, it exhibited good stability and reproducibility.