Journal
CERAMICS INTERNATIONAL
Volume 39, Issue 3, Pages 2989-2994Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2012.09.076
Keywords
Sensors; Nanomaterials; Oxides; Solid-phase synthesis
Categories
Funding
- Natural Science Foundation of Xinjiang University [BS100129, XJEDU2012I03]
- Natural Science Foundation of Xinjiang Province [2010211A09]
- National Natural Science Foundation of China [21101132, 21061013, 21271151]
- Xinjiang Autonomous Region with Science and Technology Project Plan [200991101]
- Autonomous Regions High Technology Research and Development Program [201016118]
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ZnFe2O4 nanomaterials have been synthesized by simple one-step solid-phase chemical reaction between Zn(CH3COO)(2)center dot 2H(2)O, FeCl3 center dot 9H(2)O and NaOH within a very short time at room temperature. The solid-phase products were characterized by X-ray diffraction, energy-dispersive X-ray spectroscopy, thermogravimetic analysis, transmission electron microscopy and scanning electron microscopy. Results indicated that the particle size of product can be obviously let up and the agglomeration phenomenon can be improved by the surfactant. Moreover, the ZnFe2O4 nanomaterials were applied in gas sensor and exhibited much better sensing performance than bulk ZnFe2O4. The as-prepared ZnFe2O4 nanomaterials have high sensitivity, good selectivity and fast response/ recovery characteristic for ethanol and hydrogen sulfide. The improved ZnFe2O4 nanomaterials have high response value of 21.5 and 14.8 for ethanol and hydrogen sulfide in the optimized operating temperature of 332 degrees C and 240 degrees C, respectively. The response and recovery time was found to be within 4 s and 14 s for ethanol, while 7 s and 25 s for hydrogen sulfide. (C) 2012 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
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