Journal
SENSORS AND ACTUATORS B-CHEMICAL
Volume 199, Issue -, Pages 346-353Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2014.04.003
Keywords
Fe3O4@Co3O4; Core-shell microspheres; Hydrothermal method; 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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Hierarchical Fe3O4@Co3O4 core shell microspheres were prepared through a simple two-step hydrothermal method. The structure, morphology and surface characteristics of the microspheres were characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDX), and Brunauer-Emmett-Teller (BET). The results showed that porous architectures were assembled from Fe3O4 sphere core and Co3O4 flower-like shells. The gas sensing investigations revealed that the Fe3O4@Co3O4 core shell microspheres sensors exhibited enhanced sensing properties to acetone compared with Fe3O4 microspheres and Co3O4 nano-materials, which might be attributed to the unique hierarchical structure and the synergetic effect exerted by Fe3O4 and Co3O4. (C) 2014 Elsevier B.V. All rights reserved.
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