Anjali, C and Nidhisha, V and Amrutha, TP and Gopal, R and Chethan, B and Thayyil, MS and Periyat, P and Neeroli Kizhakayil, R (2024) Graphene oxide boosted high surface area CeO2 for humidity sensing. In: Results in Engineering, 21 .
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Abstract
Precise measurement of humidity is of high significance in diverse fields like instrumentation, automated systems, agriculture and climatology. Herein as a first ever attempt, we report ceria-graphene oxide (CeO2-GO) composites as resistive type humidity sensor, that shows attractive response to moisture. High surface area ceria is synthesised via ammonia mediated precipitation from salt precursor, and CeO2-GO composites are achieved via hydrothermal route. The composites are well characterized using various analytical tools. Experiments using different mass ratios of GO in the composite show that there is an optimum amount of GO to realise maximum efficiency in the test parameters. It is further noted that the performance of the sensor is controlled by the active adsorption sites, which is proportional to surface area of the composite. An optimized CeO2-GO matrix yielded a response and recovery time of 19 s and 10 s respectively. The narrow hysteresis in moisture adsorption-desorption study and excellent stability for about 60 days are also observed for the system, warranting the successful utility of the system for practical applications. © 2024
| Item Type: | Journal Article |
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| Publication: | Results in Engineering |
| Publisher: | Elsevier B.V. |
| Additional Information: | The copyright for this article belongs to author. |
| Keywords: | Ammonia; Atmospheric humidity; Automation; Graphene; Humidity sensors; Moisture; Precipitation (chemical), moisture; Automated systems; Diverse fields; Graphene oxides; High surface area; Humidity sensing; Measurements of; Precise measurements; Resistive type; Response and recovery time, Cerium oxide |
| Department/Centre: | Division of Physical & Mathematical Sciences > Physics |
| Date Deposited: | 01 Mar 2024 06:25 |
| Last Modified: | 01 Mar 2024 06:25 |
| URI: | https://eprints.iisc.ac.in/id/eprint/83892 |
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