期刊
SURFACES AND INTERFACES
卷 10, 期 -, 页码 85-92出版社
ELSEVIER
DOI: 10.1016/j.surfin.2017.12.005
关键词
Au@SnO2/ZnO nanosheets; Au@SnO2 Schottky contact; SnO2/ZnO n-n heterojunction; TEA gas sensing
类别
资金
- Shandong Provincial Key Research and Development Program [2017GGX10135]
- Shandong Provincial Science Foundation [ZR2014JL045]
- Science Foundation of University of Jinan [XKY1504]
A triethylamine (TEA) sensor working temperature of 280 degrees C with high sensitivity and selectivity for TEA gas has been successfully fabricated by building Au@SnO2/ZnO nanosheets. By introducing a seed layer, ZnO nanosheets have been directly grown on Al2O3 tubes with a facile hydrothermal method. The Au@SnO2/ZnO structure is formed by utilizing DC-sputtering and pulsed laser deposition (PLD) methods. Compared with the pristine ZnO and SnO2/ZnO nanosheets sensors, the Au@SnO2/ZnO nanosheets sensors measured at 280 degrees C get a higher response of 48.1 toward 50 ppm of TEA gas. Moreover, the Au@SnO2/ZnO nanosheets sensor exhibits excellent selectivity. The enhanced sensing properties of the Au@SnO2/ZnO nanosheets sensor are discussed with a model of semiconductor depletion layer on the basis of n-n heterojunction and Schottky contact.
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