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A MnOOH ‐Polyaniline Nanocomposite Modified Gold Electrode for Electrochemical Sensing of Nitrite
Author(s) -
Shen Yu,
Zhang Jian,
Sheng Qinglin,
Zheng Jianbin
Publication year - 2017
Publication title -
chinese journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.28
H-Index - 41
eISSN - 1614-7065
pISSN - 1001-604X
DOI - 10.1002/cjoc.201600892
Subject(s) - nanocomposite , polyaniline , chemistry , electrochemical gas sensor , electrode , nitrite , fourier transform infrared spectroscopy , detection limit , electrochemistry , chemical engineering , nuclear chemistry , analytical chemistry (journal) , inorganic chemistry , nitrate , polymer , organic chemistry , chromatography , polymerization , engineering
A novel non‐enzymatic nitrite sensor was fabricated by immobilizing MnOOH‐PANI nanocomposites on a gold electrode (Au electrode). The morphology and composition of the nanocomposites were investigated by transmission electron microscopy ( TEM ) and Fourier transform infrared spectrum ( FTIR ). The electrochemical results showed that the sensor possessed excellent electrocatalytic ability for NO 2 − oxidation. The sensor displayed a linear range from 3.0 μmol•L −1 to 76.0 mmol•L −1 with a detection limit of 0.9 μmol•L −1 (S/N = 3), a sensitivity of 132.2 μA •L•mol −1 •cm −2 and a response time of 3 s. Furthermore, the sensor showed good reproducibility and long‐term stability. It is expected that the MnOOH‐PANI nanocomposites could be applied for more active sensors and used in practice for nitrite sensing.