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Amperometric Nitrite Sensor Based on PVP‐Os Entrapped in Titania Sol‐Gel Matrix
Author(s) -
Li Yancai,
Zhang Suxia,
Li Yazhuo,
Sun Changqing
Publication year - 2004
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.200402997
Subject(s) - amperometry , nitrite , cyclic voltammetry , sol gel , matrix (chemical analysis) , electrochemistry , materials science , electrochemical gas sensor , chemical engineering , deposition (geology) , inorganic chemistry , chemistry , nanotechnology , electrode , nitrate , organic chemistry , composite material , paleontology , engineering , sediment , biology
A novel nitrite sensor was developed based on the immobilization of a partially quaternized poly(4‐vinylpyridine) complexed with [Os(bpy) 2 Cl] +/2+ (PVP‐Os) in a porous TiO 2 sol‐gel matrix by a vapor deposition method. The preparation process simplified the traditional sol‐gel process and prevented the cracking of conventional sol‐gel derived glasses. Electrochemical behavior of the sensor was characterized by cyclic voltammetry and shows excellent electrocatalytic response for the reduction of nitrite. Effect of operating potential on electrochemical responses of the sensor was explored for optimum analytical performance by using the amperometric method. The stability of the sensor was also evaluated.