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Ag Dispersed Conducting Polyaniline Nanocomposite as a Selective Sensor for Ammonia

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Abstract:

Silver nanoparticles were synthesized by irradiating silver nitrate solution (10-4 M) (methanol:water as a solvent) with different concentrations of aniline as a stabilizer in a 60Co g-ray source at a dose rate of 1.1 kGy. The particles exhibiting maximum stability up to a period of 7 days were obtained at the concentration of 0.1M aniline. The average particle size of the nanoparticles as estimated from XRD and TEM was found to be ~23 nm. Silver-Polyaniline (Ag-Pani) nanocomposite was prepared by oxidative polymerization of aniline. The applicability of synthesized nanocomposite as a sensor was tested by exposing the same to different chemical vapors viz. alcohols, amines, ammonia, chloroform etc. The results revealed its selectivity towards ammonia vapors and a long term stability of response is observed up to a period of two months. The above results are well supported by FT-IR spectroscopy.

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Info:

Periodical:

Journal of Metastable and Nanocrystalline Materials (Volume 23)

Pages:

323-326

DOI:

https://doi.org/10.4028/www.scientific.net/JMNM.23.323

Citation:

Cite this paper

Online since:

January 2005

Authors:

Anjali A. Athawale, Prachi P. Katre

Keywords:

Ag-Pani Nanocomposite, Ammonia Vapour Sensor, Silver Nanoparticle, γ-Irradiation

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