Abstract
This paper demonstrated a high-performance hydrogen gas sensor based on CuO–reduced graphene oxide (rGO)–CuO sandwiched nanostructure. The CuO–rGO–CuO nanostructure was examined by scanning electron microscopy, X-ray diffraction and transmission electron microscope. The gas sensing characteristics of the CuO–rGO–CuO film sensor were evaluated at room temperature against hydrogen over a wide concentration range, which are better than that of pristine CuO and rGO. High sensitivity, good repeatability, and response–recovery characteristics were achieved in this work. Furthermore, the possible sensing mechanism of the presented sensor was explored.
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