Journal
MATERIALS LETTERS
Volume 159, Issue -, Pages 5-8Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.matlet.2015.06.050
Keywords
Hydrothermal; SnO2 nanoflower; Microstructure; Porous feature; Ethanol; Sensors
Funding
- National Natural Science Foundation of China
- College Basic Scientific Research Operation Cost of Gansu province
- Scientific Research Foundation for the Returned Overseas Chinese Scholars, State Education Ministry and Natural Science Foundational of Gansu province
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The porous flower-like SnO2 architecture, consisting of numerous aggregative nanosheets was successfully synthesized via a facile hydrothermal process and subsequent calcination. The morphology and gas-sensing property were mainly studied. The pores on its surface provided much active center and gas diffusion ways. The sensor based on this architecture showed the high response, fast response/recovery time and good selectivity toward ethanol at 300 degrees C. The sensitivity was about 208 and the response-recovery time were around 8 and 7 s for 500 ppm ethanol, respectively. The results indicated that porous flower-like SnO2 architecture was a potential candidate for fabricating effective ethanol sensor. Furthermore, the possible growth mechanism and the ethanol sensing mechanism of the architecture were discussed, too. (C) 2015 Elsevier B.V. All rights reserved.
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