Synthesis, surface modification and ethanol sensing properties of Sb-doped SnO2

Jiarui Huang; Kun Yu; Anna A. Zhukova; Marina N. Rumyantseva; Alexandre M. Gaskov; Junhai Wang; Cuiping Gu; Jinhuai Liu

doi:10.1117/12.843509

20 October 2009 Synthesis, surface modification and ethanol sensing properties of Sb-doped SnO₂

Jiarui Huang, Kun Yu, Anna A. Zhukova, Marina N. Rumyantseva, Alexandre M. Gaskov, Junhai Wang, Cuiping Gu, Jinhuai Liu

Proceedings Volume 7493, Second International Conference on Smart Materials and Nanotechnology in Engineering; 749376 (2009) https://doi.org/10.1117/12.843509
Event: Second International Conference on Smart Materials and Nanotechnology in Engineering, 2009, Weihai, China

Abstract

Sb-doped SnO₂ whiskers were prepared by thermal evaporation of mixture of SnO and Sb₂O₃ powders. And then the surface of the whisker was modified with the Au nanoparticles (Au NPs) by in situ reduction method. FE-SEM observations reveal that the synthesized products consist of a large number of whiskers. The Au NPs were homogeneously distributed on the surface of the whisker. The ethanol sensitive characteristics of single SnO₂ whiskerbased sensors have been investigated. These sensors show good sensitivity, rapid response and recovery. The response and recovery time of the sensor is about 38-45 s and 125-150 s, respectively. It is found that the working temperature of the sensor decreases after the surface of Sb-doped whiskers modified with Au NPs. Compared to the unmodified Sbdoped SnO₂ whisker, Au NPs modified Sb-doped SnO₂ whisker exhibits greatly improvement of sensitivity which could be explained by the catalytic action of Au NPs. These results indicate that the Au NPs modifying the surface of SnO₂ whiskers is important for improving its sensitivity and lowering the working temperature. This is the first step towards fundamental understanding of single-crystalline tin oxide whiskers for sensor applications, which could lead to integration in real devices.

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Jiarui Huang, Kun Yu, Anna A. Zhukova, Marina N. Rumyantseva, Alexandre M. Gaskov, Junhai Wang, Cuiping Gu, and Jinhuai Liu "Synthesis, surface modification and ethanol sensing properties of Sb-doped SnO₂", Proc. SPIE 7493, Second International Conference on Smart Materials and Nanotechnology in Engineering, 749376 (20 October 2009); https://doi.org/10.1117/12.843509

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KEYWORDS

Gold

Sensors

Nanoparticles

Bioalcohols

Antimony

Oxides

Tin

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