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Development of sensors based on CuO-doped SnO2 hollow spheres for ppb level H2S gas sensing

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Abstract

An effort has been made to develop a new kind of SnO2–CuO gas sensor which could detect an extremely small amount of H2S gas at relatively low working temperature. The sensor nanomaterials were prepared from SnO2 hollow spheres (synthesized by employing carbon microspheres as temples) and Cu precursor by dipping method. The composition and structural characteristics of the as-prepared CuO-doped SnO2 hollow spheres were studied by X-ray photoelectron spectroscopy, X-ray powder diffraction, scanning electron microscopy, and transmission electron microscopy. Gas-sensing properties of CuO-doped SnO2 hollow sphere were also investigated. It was found that the sensor showed good selectivity and high sensitivity to H2S gas. A ppb level detection limit was obtained with the sensor at the relatively low temperature of 35 °C. Such good performances are probably attributed to the hollow sphere nanostructures. Our results imply that materials with hollow sphere nanostructures are promising candidates for high-performance gas sensors.

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Acknowledgements

We are grateful to the financial support for this work from the Knowledge Innovation Program of the Chinese Academy of Sciences, the National High Technology Research and Development Program of China (Grant No. 2007AA022005), the National Basic Research Program of China (Grant No. 2007CB936603), and the National Natural Science Foundation of China (Grant Nos. 60604022 and 10635070).

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Authors and Affiliations

  1. Key Laboratory of Biomimetic Sensing and Advanced Robot Technology, Hefei Institute of Intelligent Machines, Chinese Academy of Sciences, Hefei, 230031, People’s Republic of China

    Lifang He, Yong Jia, Fanli Meng, Minqiang Li & Jinhuai Liu

  2. Department of Chemistry, University of Science and Technology of China, Hefei, 230026, People’s Republic of China

    Lifang He, Fanli Meng & Jinhuai Liu

  3. Department of Pharmacy, Anhui University of Traditional Chinese Medicine, Hefei, 230031, People’s Republic of China

    Yong Jia

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  1. Lifang He
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Correspondence to Jinhuai Liu.

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He, L., Jia, Y., Meng, F. et al. Development of sensors based on CuO-doped SnO2 hollow spheres for ppb level H2S gas sensing. J Mater Sci 44, 4326–4333 (2009). https://doi.org/10.1007/s10853-009-3645-y

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