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Vol. 32 No. 8 (2020): Vol 32 Issue 8, 2020

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Synthesis, Characterization and Ammonia Sensing Studies on Novel Polypyrrole/Zinc Oxide/SWCNT Nanocomposite

https://doi.org/10.14233/ajchem.2020.22732
Ahmad Husain
Department of Applied Chemistry, Faculty of Engineering and Technology, Aligarh Muslim University, Aligarh-202002, India
Mohd Urooj Shariq
Department of Chemistry, Faculty of Science, Aligarh Muslim University, Aligarh-202002, India
Sharique Ahmad
Department of Applied Chemistry, Faculty of Engineering and Technology, Aligarh Muslim University, Aligarh-202002, India
Anees Ahmad
Department of Chemistry, Faculty of Science, Aligarh Muslim University, Aligarh-202002, India
Faiz Mohammad
Department of Applied Chemistry, Faculty of Engineering and Technology, Aligarh Muslim University, Aligarh-202002, India

Corresponding Author(s) : Mohd Urooj Shariq

murooj17@gmail.com

Asian Journal of Chemistry, Vol. 32 No. 8 (2020): Vol 32 Issue 8, 2020

Abstract

Herein, the synthesis and characterization of a novel polypyrrole (PPy)/zinc oxide (ZnO)/SWCNT nanocomposite together with pristine polypyrrole is reported. These as-prepared materials  have been characterized by FT-IR spectroscopy, X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and thermogravimetric analysis (TGA) techniques. The PPy/ZnO/SWCNT nanocomposite is used as a pellet-shaped ammonia sensor. The sensing response is calculated in terms of variation in the DC electrical conductivity at different concentration of ammonia ranging from 50 ppm to 2000 ppm. The sensing response of the sensor is determined at 2000, 1000, 500, 400, 300, 200, 100 and 50 ppm  and found to be 76.3, 60.5, 54.8, 52.6, 50.2, 48.5, 40.5 and 36.6%, respectively The sensor displays excellent reversibility along with very high selectivity and stability. Finally, a sensing mechanism is also proposed involving polarons (charge carriers) of polypyrrole and lone pairs of electrons of ammonia molecules

Keywords

Polypyrrole Zinc oxide SWCNT Nanocomposite Ammonia sensor
Husain, A. ., Shariq, M. U. ., Ahmad, S., Ahmad, A. ., & Mohammad, F. . (2020). Synthesis, Characterization and Ammonia Sensing Studies on Novel Polypyrrole/Zinc Oxide/SWCNT Nanocomposite. Asian Journal of Chemistry, 32(8), 1961–1966. https://doi.org/10.14233/ajchem.2020.22732
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