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Enhancement in ammonia sensitivity with fast response by doping Al 2 O 3 in polyaniline
Author(s) -
Tripathi Akhilesh,
Misra Kamakhya Prakash,
Shukla R. K.
Publication year - 2013
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.39379
Subject(s) - polyaniline , ammonia , dopant , fourier transform infrared spectroscopy , scanning electron microscope , materials science , analytical chemistry (journal) , doping , infrared spectroscopy , spectroscopy , composite number , conductive polymer , nuclear chemistry , chemical engineering , chemistry , polymer , organic chemistry , composite material , polymerization , physics , optoelectronics , quantum mechanics , engineering
Al 2 O 3 mixed polyaniline composite with different dopant concentrations have been synthesized successfully by chemical oxidation method. X‐ray diffraction, Fourier transform infrared spectroscopy, and UV–visible spectroscopy confirm the synthesis of the polyaniline and Al 2 O 3 mixed polyaniline composite. Scanning electron microscopy shows the weak crystalline quality of the samples. The samples are found sensitive to ammonia gas. The sensing properties have been studied at different temperatures i.e. 25°C, 50°C, and 100°C by varying the ammonia concentration over a range of 100–1500 ppm. The sensitivity increases with increasing Al 2 O 3 concentration, increasing ammonia concentration, and also with increasing the sensing temperature. Sensitivity of these samples to ammonia gas is good with fast response. © 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 130: 1941–1948, 2013