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pH electrodes constructed from polyaniline/zeolite and polypyrrole/zeolite conductive blends
Author(s) -
Malkaj P.,
Dalas E.,
Vitoratos E.,
Sakkopoulos S.
Publication year - 2006
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.23590
Subject(s) - polypyrrole , polyaniline , conductive polymer , materials science , electrolyte , aqueous solution , chemical engineering , electrode , zeolite , polyaniline nanofibers , polymer chemistry , electrochemistry , polymer , chemistry , composite material , polymerization , organic chemistry , catalysis , engineering
A new type of solid state electrodes sensitive to pH changes is described, in which the chemical‐sensitive layer consists of Pt microparticles deposited on a conducting polymer (polyaniline, polypyrrole) blend containing 22.7% w/w zeolite. These sensors are stable in aqueous electrolyte solutions of low pH value at temperatures up to 45°C with response time in seconds. At 25°C, sensor sensitivity was −310 ± 40 mV/pH and −1300 ± 100 mV/pH for polyaniline and polypyrrole blends, respectively. Interferences appear to be acceptably small. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 101: 1853–1856, 2006