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Synthesis of Tin Dioxide Octahedral Nanoparticles with Exposed High-Energy {221} Facets and Enhanced Gas-Sensing Properties

Authors

  • Xiguang Han,

    1. State Key Laboratory for Physical Chemistry of Solid Surfaces, Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005 (China), Fax: (+86) 592-218-3047
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  • Mingshang Jin,

    1. State Key Laboratory for Physical Chemistry of Solid Surfaces, Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005 (China), Fax: (+86) 592-218-3047
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  • Shuifen Xie,

    1. State Key Laboratory for Physical Chemistry of Solid Surfaces, Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005 (China), Fax: (+86) 592-218-3047
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  • Qin Kuang Dr.,

    1. State Key Laboratory for Physical Chemistry of Solid Surfaces, Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005 (China), Fax: (+86) 592-218-3047
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  • Zhiyuan Jiang Dr.,

    1. State Key Laboratory for Physical Chemistry of Solid Surfaces, Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005 (China), Fax: (+86) 592-218-3047
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  • Yaqi Jiang,

    1. State Key Laboratory for Physical Chemistry of Solid Surfaces, Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005 (China), Fax: (+86) 592-218-3047
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  • Zhaoxiong Xie Prof.,

    1. State Key Laboratory for Physical Chemistry of Solid Surfaces, Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005 (China), Fax: (+86) 592-218-3047
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  • Lansun Zheng Prof.

    1. State Key Laboratory for Physical Chemistry of Solid Surfaces, Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005 (China), Fax: (+86) 592-218-3047
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  • This work was supported by the National Natural Science Foundation of China (Grant Nos. 20725310, 20721001, 20673085, and 20801045) and the National Basic Research Program of China (Grant Nos. 2007CB15303, 2009CB939804).

Abstract

original image

Selective exposure of high-energy {221} facets with many surface dangling bonds, (111) terraces, and (110) steps (bottom picture) at the surface of octahedral SnO2 nanoparticles (top) through a simple hydrothermal synthesis route gives them enhanced gas-sensing performance over particles with other shapes, whereby the sensing activity is proportional to the fraction of {221} facets among the exposed surfaces.

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