Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7139918 | Sensors and Actuators B: Chemical | 2018 | 35 Pages |
Abstract
A NiO@rGO nanocomposite is prepared by a freeze-drying method combined with heat treatment. The morphology and structure are analyzed through X-ray diffraction, scanning electron microscopy, transmission electron microscopy, Raman spectra, and X-ray photoelectron spectroscopy. The results clearly show that NiO nanoparticles are uniformly anchored on the surface of the rGO nanosheet. The gas-sensing performance of the nanocomposite is also investigated to detect hydrogen. The NiO@rGO sensor exhibits good gas-sensing performance with high sensitivity, fast response, good reversibility, and selectivity toward hydrogen. The relative response of the sensor to 1% hydrogen is 0.64, the response time is 28â¯s, and the recovery time is 142â¯s. The improved sensing performance is due to the effective electron transfer between the NiO nanoparticles and rGO nanosheet.
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Authors
Haibo Ren, Cuiping Gu, Sang Woo Joo, Jingjuan Zhao, Yufeng Sun, Jiarui Huang,