Please use this identifier to cite or link to this item: https://dspace.iiti.ac.in/handle/123456789/7664
Title: Mesoporous nickel cobalt hydroxide/oxide as an excellent room temperature ammonia sensor
Authors: Sharma, Alfa
Kumar, Y. B.Kishore
Shirage, Parasharam Maruti
Keywords: Chemical detection;Cobalt compounds;Gas detectors;Mesoporous materials;Nickel;Scanning electron microscopy;Surface reactions;Ammonia concentrations;Ammonia sensors;Chemisorbed oxygen;Cobalt hydroxides;Freundlich equations;Majority charge carriers;Mesoporous;Wet-chemical method;Ammonia
Issue Date: 2017
Publisher: Elsevier Ltd
Citation: Sharma, A., Bhojane, P., Rana, A. K., Kumar, Y., & Shirage, P. M. (2017). Mesoporous nickel cobalt hydroxide/oxide as an excellent room temperature ammonia sensor. Scripta Materialia, 128, 65-68. doi:10.1016/j.scriptamat.2016.10.003
Abstract: We report an excellent room temperature NH3 gas sensing performance using highly mesoporous nanoflakes of Ni-Co hydroxide/Oxide synthesised by facile and economical wet chemical method. The dynamic sensing of NiCo2(OH)6(NCH) and NiCo2O4 (NCO) shows nearly 3 and 2 fold increase in sensitivity by varying NH3 concentrations demonstrating excellent sensitivity which is in accordance to Freundlich equation. The interesting behaviour of NCO being p–type material spectacles n-type gas sensing behaviour towards low ammonia concentration at RT. The anomalous sensing response is ascribed to transition of majority charge carriers due to surface reaction of chemisorbed oxygen ions and ammonia gas vapours. © 2016 Acta Materialia Inc.
URI: https://doi.org/10.1016/j.scriptamat.2016.10.003
https://dspace.iiti.ac.in/handle/123456789/7664
ISSN: 1359-6462
Type of Material: Journal Article
Appears in Collections:Department of Metallurgical Engineering and Materials Sciences

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