Selective Carbon Monoxide-Gas-Sensing Properties over CuO/Rb₂CO₃ Nanohybrid Structure

Abstract:

CuO/Rb₂CO₃ nanohybrid structures are fabricated, and their selectivity to CO over H₂ as well as related sensing mechanisms are investigated. A series of CuO/Rb₂CO₃ nanohybrid structures are deposited on alumina substrates by the bar-coating method. The chemical, morphological, and structural properties of the nanohybrid structures are examined by scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), X-ray diffraction (XRD), and Raman spectroscopy. The best selectivity to CO over H₂ and highest CO response level are observed upon CuO/Rb₂CO₃ nanohybrid (5 wt.% Rb₂CO₃). The gas-sensing performance of the CuO/Rb₂CO₃ hybrid nanostructures is analyzed to prove that the catalytic properties of Rb2CO3 and its modulation ability to hole accumulation layer thickness of CuO determine the outstanding selectivity and high response level of CuO/Rb₂CO₃ nanohybrid structure compared to pristine CuO nanoparticles.

• Periodical: Solid State Phenomena (Volume 368)
• Pages: 17-27
• DOI: https://doi.org/10.4028/p-zMF1Pl
• Online since: December 2024
• Authors: Manh Hung Nguyen*, Van Hoang Nguyen, Tien Hung Pham, Dinh Hoat Phung, Minh Hieu Nguyen
• Keywords: CO Gas Sensing, CO Gas Sensor, CuO/Rb₂CO₃, Nanohybrid

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