In:
ECS Journal of Solid State Science and Technology, The Electrochemical Society, Vol. 11, No. 3 ( 2022-03-01), p. 035009-
Abstract:
Gas sensors are instrumental in the control and monitoring of air pollution. A facile fabrication method for low-cost gas sensors with high sensitivity and a fast response time is crucial in practical applications. Here, reduced graphene oxide (rGO)–CuO nanocomposites were synthesized for gas-sensing applications using a facile hydrothermal method. The crystal structure, surface morphology, and electrical properties of the nanocomposites were inferred from X-ray powder diffraction patterns, scanning electron microscopic images, and current–voltage ( I – V ) measurements, respectively. The results confirmed a high-quality rGO–CuO material with a spherical flower-like morphology. The CuO material showed a single-phase monoclinic crystal structure with an average crystal size of ∼21 nm. Within the composite, high-quality rGO was incorporated into the porous spherical flower-like CuO material. In gas-sensing measurements, the rGO–CuO nanocomposite detected NO 2 gas at low concentrations (1–5 ppm) with reasonably high response values and a fast response time ( 〈 1 min). An rGO–CuO nanocomposite-based sensor was fabricated, showing good repeatability for practical applications.
Type of Medium:
Online Resource
ISSN:
2162-8769
,
2162-8777
DOI:
10.1149/2162-8777/ac5c7f
Language:
Unknown
Publisher:
The Electrochemical Society
Publication Date:
2022
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