期刊
SENSORS AND ACTUATORS B-CHEMICAL
卷 221, 期 -, 页码 88-95出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2015.06.104
关键词
SnO2-ZnO; Electrospinning; Hetero-nanofibers; Ethanol sensing; Gas sensing mechanism
资金
- National Natural Science Foundation of China [10874140]
- Natural Science Foundation of Gansu Province [1308RJZA258]
- College Basic Scientific Research Operation Cost of Gansu Province
- Scientific Research Foundation for the Returned Overseas Chinese Scholars, State Education Ministry
- Foundations of Northwest Normal University [NWNU-LKQN-13-18, NWNU-LKQN-14-22]
SnO2-ZnO hetero-nanofibers were fabricated by a facile electrospinning method and calcination in this study. The SnO2-ZnO nanofibers were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), Brunauer-Emmett-Teller (BET) and X-ray diffraction (XRD). The gas sensor prepared by the SnO2-ZnO hetero-nanofibers revealed better ethanol sensing performance than pure ZnO and pure SnO2 nanofibers, good stability and excellent selectivity at the optimum temperature of 300 degrees C. The response and recovery time to 100 ppm ethanol were about 25 s and 9 s, respectively. The growth mechanism of the hetero-nanofibers was discussed, as well as the ethanol adsorption-desorption mechanism. (C) 2015 Elsevier B.V. All rights reserved.
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