One-step Synthesis and Gas Sensing Properties of Hierarchical SnO2 Materials |
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| Authors: | GUAN Yue WANG Chong WANG Biao MA Jian XU Xiu-mei SUN Yan-feng LIU Feng-min LIANG Xi-shuang GAO Yuan LU Ge-yu |
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| Affiliation: | 1. State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, Changchun 130012, P. R. China;
2. Changchun Institute Optics, Fine Mechanics and Physics, Chinese Academy Sciences, Changchun 130033, P. R. China |
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| Abstract: | Hierarchical tin oxide(SnO2) architectures were synthesized with a facile hydrothermal method. In the hydrothermal synthesis, sodium dodecyl benzene sulfonate(SDBS) surfactant plays an important role as structure-directing reagent. The synthesized samples were characterized by powder X-ray diffraction(XRD), field emission scanning electron microscopy(FESEM), transmission electron microscopy(TEM) and high-resolution transmission electron microscopy(HRTEM). The results clearly reveal that the hierarchical architectures of SnO2 were composed of aggregated nanosheets with a thickness of about 100 nm. A possible mechanism for the formation of the SnO2 hierarchical architectures was proposed. In addition, the gas sensing properties of the as-prepared products were investigated and it was found that the sensor based on the special SnO2 hierarchical architectures exhibited a high response and good selectivity to NO2 at the optimal working temperature of 160 ℃. |
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| Keywords: | Tin oxide Hydrothermal method Sodium dodecyl benzene sulfonate(SDBS) NO2 |
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