Abstract
In this paper, CuO nanosheets were synthesized via hydrothermal process and efficiently utilized as redox mediator for the fabrication of efficient ethanol chemi-sensor. The morphological investigation of synthesized CuO products were analyzed by field emission scanning electron microscopy (FESEM) which confirmed that the synthesized products are sheet-shaped and are grown in large quantity. The detailed structural, compositional and optical characterizations of the synthesized nanosheets were done by X-ray diffraction (XRD) pattern, Fourier transform infrared (FTIR) and UV–vis spectroscopy, respectively which confirmed that the obtained nanosheets are well-crystalline pure CuO and possessing good optical properties. The fabricated ethanol sensor based on CuO nanosheet exhibits good sensitivity (~0.9722 µA·cm –2.mM –1) and lower detection limit (0.143 mM), with linearity (R = 0.7806) in short response time (10.0 s).
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