Bhangare, Bhagyashri and Jagtap, Shweta and Ramgir, Niranjan and Waichal, Rupali and Muthe, K. P. and Gupta, S. K. and Gadkari, Sanjay C. and Aswal, D. K. and Gosavi, Suresh (2018) Evaluation of Humidity Sensor Based on PVP-RGO Nanocomposites. IEEE Sensors Journal, 18 (22). pp. 9097-9104. ISSN 1530-437X

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Abstract

This paper describes the humidity sensing properties of one step in situ synthesized poly (N-vinyl pyrrolidone)- reduced graphene oxide (PVP-RGO) nanocomposites. Different PVP-RGO nanocomposites were obtained by varying PVP/GO weight %ratio as x/50 mg, wherein x = 25, 50, and 75 mg, respectively. The real-time adsorption kinetics of the water molecules during the humidity sensing were also discussed using Elovich model, pseudo first and second order equations. The increase in humidity response of 1.5 PVP-RGO nanocomposite is attributed to the presence of large amount of oxygen functionalities. The above observation was corroborated using spectroscopic analysis. The optimized PVP-RGO nanocomposite showed faster response kinetics with response and recovery times of 10 and 20 s, respectively. The present humidity sensor shows remarkable linearity over the range of 20-90%RH. More specifically, sensitivity was correlated with oxygen functionalities created due to variation of PVP during the functionalization of RGO nanosheets.

Item Type:	Article
Additional Information:	Copyright for this article belongs to M/s Institute of Electrical and Electronics Engineers.
Subjects:	Engineering > Electronics and Electrical Engineering Instruments/ Instrumentation Applied Physics/Condensed Matter
Divisions:	UNSPECIFIED
Depositing User:	Mr. Yogesh Joshi
Date Deposited:	22 Aug 2019 11:29
Last Modified:	22 Aug 2019 11:29
URI:	http://npl.csircentral.net/id/eprint/3987

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