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Synthesis and Enhanced Formaldehyde-Sensing Properties of In2O3 Hollow Spheres with Thin Shells

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Abstract

Uniform-size In2O3 hollow spheres were synthesized using carbon microspheres as sacrificial template and In(NO3)3 as the indium resource. The effects of different solvents on the structure and morphology of as-prepared samples were discussed, and it was found that the shell thickness of In2O3 hollow microspheres could be controlled by changing solvents. The formation mechanism of the In2O3 hollow microspheres was also investigated. The gas-sensing results indicated that all of the as-prepared samples showed high gas-sensing response and excellent selectivity to formaldehyde and In2O3 hollow microspheres had an advantage over the bulk In2O3. Notably, In2O3 hollow microspheres with the shell thickness of 20 nm were fabricated by methanol solution and showed a higher response value of 41 toward 100 ppm HCHO than those of In2O3 hollow microspheres obtained by using other solvents. In2O3 hollow microspheres had good selectivity, high response and fast response-recovery, which made this product a promising gas-sensing material for detecting formaldehyde.

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Acknowledgements

This work is supported by the National Natural Science Foundation of China (51272165, 51672138 and 5157277), the Research Foundation of Key Laboratory of Material Corrosion and Protection of Sichuan Province (2014CL13), and the Research Foundation of Sichuan University of Science and Engineering (2014PY11, 2015PY01 and 2012RC03), the Special Funds for the Development of Strategic Emerging Industries in Shenzhen City (JCYJ20150525092941022).

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Authors and Affiliations

  1. School of Materials Science and Engineering, Sichuan University of Science and Engineering, Key Laboratory of Material Corrosion and Protection of Sichuan Province, Zigong, 643000, People’s Republic of China

    Yanzhao Zou, Hong Wang, Xuefei Li, Xiaofei Zhou, Guo Lin & Jian Chen

  2. State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering, School of Chemistry and Chemical Engineering, Ningxia University, Yinchuan, 750021, People’s Republic of China

    Xiaoyong Lai

  3. Key Laboratory of Inorganic Synthesis and Preparative Chemistry, Jilin University, Changchun, 130012, People’s Republic of China

    Di Liu

  4. College of Chemistry and Environmental Engineer, Shenzhen University, Shenzhen, 518052, People’s Republic of China

    Hong Xin

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  1. Yanzhao Zou
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  2. Hong Wang
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  3. Xiaoyong Lai
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  4. Xuefei Li
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  6. Guo Lin
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  7. Di Liu
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  8. Jian Chen
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  9. Hong Xin
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Correspondence to Hong Wang.

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Zou, Y., Wang, H., Lai, X. et al. Synthesis and Enhanced Formaldehyde-Sensing Properties of In2O3 Hollow Spheres with Thin Shells. J. Electron. Mater. 47, 2165–2170 (2018). https://doi.org/10.1007/s11664-017-6027-2

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  • DOI: https://doi.org/10.1007/s11664-017-6027-2

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