Room Temperature Ammonia Gas Sensor Based on Polyaniline-TiO 2 Nanocomposite

In the present work, we report on the performance of room temperature ammonia gas sensor based on polyaniline-titanium dioxide (PANi-TiO 2 ) nanocomposite. The nanocomposite was fabricated using the spin coating method on glass substrates. PANi-TiO 2 (0%-50%) nanocomposite films were characterized f...

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Bibliographic Details
Published in:IEEE sensors journal 2011-12, Vol.11 (12), p.3417-3423
Main Authors: Pawar, S G, Chougule, MA, Patil, S L, Raut, B T, Godse, PR, Sen, Shashwati, Patil, V B
Format: Article
Language:English
Subjects:
Ammonia
Gas sensors
Nanocomposites
Nanomaterials
Nanostructure
Sensors
Spin coating
Titanium dioxide
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Summary:In the present work, we report on the performance of room temperature ammonia gas sensor based on polyaniline-titanium dioxide (PANi-TiO 2 ) nanocomposite. The nanocomposite was fabricated using the spin coating method on glass substrates. PANi-TiO 2 (0%-50%) nanocomposite films were characterized for their structural as well as surface morphologies, UV-Vis and various gas responses were studied. The XRD analysis showed formation of nanocrystalline TiO 2 , while polyaniline exhibited amorphous nature. Morphological analysis using scanning electron microscopy of PANi-TiO 2 nanocomposite film revealed uniform distribution of TiO 2 nanoparticles in PANi matrix. The absorption peaks in FTIR and UV-Vis spectra of PANi-TiO 2 composite film were found to shift to a higher wave number as compared to those observed in pure PANi. The observed shifts were attributed to the interaction between the TiO 2 particle and PANi molecular chains. The gas sensing properties showed the sensor exhibit selectivity to ammonia (NH 3 ) at room temperature.
ISSN:1530-437X
1558-1748
DOI:10.1109/JSEN.2011.2160392