Abstract
In this paper, hierarchical Co3O4 flower-like microspheres have been successfully synthesized on the basis of morphology-conserved transformation method. The key step of this method is to construct flower-like microstructures of the cobalt-containing precursors via manipulating the synthetic parameters in a facile ethylene glycol mediated solvothermal reaction. The as-prepared flower-like microspheres are formed from the assembly of many two-dimensional nanosheets, accompanied by an outside-in dissolution and recrystallization process. Finally, hierarchical Co3O4 microspheres with conserved flower-like morphology are obtained through the moderate calcination. When evaluated as a gas sensor, the obtained Co3O4 flower-like microspheres exhibit a good response and sensitivity towards ethanol gas, suggesting their promising potential for gas sensors application.
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The authors gratefully acknowledge the financial supports from the National Natural Science Foundation of China (Grant No. 21206025) and the Natural Science Foundation of Hebei Province (Grant No. B2013402008).
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Che, H., Liu, A., Hou, J. et al. Solvothermal synthesis of hierarchical Co3O4 flower-like microspheres for superior ethanol gas sensing properties. J Mater Sci: Mater Electron 25, 3209–3218 (2014). https://doi.org/10.1007/s10854-014-2005-0
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DOI: https://doi.org/10.1007/s10854-014-2005-0