期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 737, 期 -, 页码 603-612出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2017.12.016
关键词
Au@ZnO/SnO2 nanosheet; Directly grown; Schottky contact; Heterojunction; TEA gas sensing
资金
- Shandong Provincial Key Research and Development Program [2017GGX10135]
- Shandong Provincial Science Foundation [ZR2014JL045]
- Science Foundation of University of Jinan [XKY1504]
In this report, uniform SnO2 nanosheets (NSs) have been in-situ grew on the surface of Al2O3 tubes via a cost-efficient hydrothermal synthesis at low temperature. The nanostructures of ZnO/SnO2 were prepared by employing pulsed laser deposition (PLD) method. Furthermore, Au surface modification with DC-sputtering process is used to improve the sensitivity of ZnO/SnO2 NSs sensor to TEA gas. The Au@ZnO/SnO2 NSs exhibited high response (S = 115) to 100 ppm trimethylamine (TEA) gas at 300 degrees C, which was about 20 times higher than that of the pristine SnO2 NSs. The enhanced sensing properties of Au@ZnO/SnO2 NSs sensor are discussed from the points of Au@ZnO Schottky contact and ZnO/SnO2 n-n heterojunction on the basic of depletion layer model. (C) 2017 Elsevier B.V. All rights reserved.
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