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Amperometric Nitrite Sensor Based on PVP-Os Entrapped in Titania Sol-Gel Matrix

✍ Scribed by Yancai Li; Suxia Zhang; Yazhuo Li; Changqing Sun

Publisher
John Wiley and Sons
Year
2004
Tongue
English
Weight
351 KB
Volume
16
Category
Article
ISSN
1040-0397

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✦ Synopsis

Abstract

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.

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