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| Synthesis and GAS Sensing Properties of Au-modified SnO2 Composite Nanomaterials |
| CHEN Xuesong, LU Qiuhong, WANG Haihua, SUN Zhenhua |
| Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016 |
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Cite this article:
CHEN Xuesong LU Qiuhong WANG Haihua SUN Zhenhua. Synthesis and GAS Sensing Properties of Au-modified SnO2 Composite Nanomaterials. Chin J Mater Res, 2012, 26(4): 349-354.
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Abstract SnO2 and Au modified SnO2 nanoparticles were prepared by one-pot hydrothermal synthesis method with HAucl4 and SnCl2(acac)2. The morphology, composition and structure of the samples were analyzed by TEM, EDS, XRD and XPS, and the gas sensing performance of the two materials for ethanol was tested. The results show that the morphology of both samples is nanoparticle, and the average diameter is about 9–12 nm. The crystal structure of SnO2 is rutile type, and Au is face centered cubic structure. In the sample of Au/SnO2, the mass ratio of Au and SnO2 is 2.6%, and Au element exists with a mixture of Au0 and Au3+ valence states. Comparing with pure SnO2 nanoparticles, Au modifing can significantly improve the sensitivity and selectivity of the gas sensors on the response to ethanol.
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Received: 11 April 2012
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| Fund: Supported by the National Natural Science Foundation of China No.51001098, and the Institute of Metal Research No.09NBA211A1. |
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