Journal
SENSORS AND ACTUATORS B-CHEMICAL
Volume 209, Issue -, Pages 515-523Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2014.12.010
Keywords
CuO-NiO; Core-shell microspheres; Hydrothermal method; H2S gas sensor
Funding
- National Natural Science Foundation of China [61274068, 61275035]
- Chinese National Programs for High Technology Research and Development [2013AA030902]
- Project of Science and Technology Development Plan of Jilin Province [20120324, 20130206021GX]
- Opened Fund of the State Key Laboratory on Integrated Optoelectronics [IOSKL2012KF03]
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CuO-NiO core-shell microspheres were prepared through a simple two-step hydrothermal method. The crystal structure, valence state and morphology of the CuO-NiO core-shell were studied by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and scanning electron microscopy (SEM). The surface characteristic of the microspheres was investigated by the nitrogen adsorption method. To demonstrate the use of CuO-NiO core-shell materials, a chemical gas sensor has been fabricated and investigated. The results revealed that core-shell microspheres sensor exhibited enhanced H2S sensing properties compared with bare CuO microspheres. The enhanced gas responses were discussed in relation to catalytic effect of NiO flower-like shell as well as formation of heterojunction. (C) 2014 Elsevier B.V. All rights reserved.
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