期刊
SENSORS AND ACTUATORS B-CHEMICAL
卷 257, 期 -, 页码 419-426出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2017.10.175
关键词
Nonaqueous synthesis; Pd-functionalized SnO2/In2O3; nanocomposites; Butane; Gas sensor; Selectivity
资金
- Department of Science and Technology of Yunnan Province [2017FA025]
- National Natural Science Foundation of China [61761047]
- Department of Education of Yunnan Province [2015Y008]
This article reports a new option, SnO2/In2O3 nanocomposites, for butane detection synthesized by a simple nonaqueous synthesis. A small particle of 3-5 nm and a high specific surface area (around 123.47 m(2)/g) are obtained. To further enhance the sensing properties, a wide Pd functionalization was investigated. It is revealed that the as-synthesized 7 at% Pd-functionalized SnO2/In2O3 nanocomposites exhibits high response of 71.28 towards 3000 ppm butane at optimal operating temperature of 320 degrees C. Furthermore, rapid response (3.51 s) and recovery (7.86 s) time, wide detection range (1-3000 ppm), and good selectivity in general flammable gases are observed. Besides the native nature of both SnO2 and In2O3, the excellent sensing properties can be plausibly explained by the synergistic effects arising from the simultaneous presence of these multiple functional materials, i.e. the high specific surface area, the formation of the heterojunctions, the mutual doping effect, and the influence of Pd nanoparticles. (c) 2017 Elsevier B.V. All rights reserved.
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