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Preparation of Fe-doped NaBi(MoO4)2 nanorods and their improved gas-sensing properties

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Abstract

NaBi(MoO4)2 nanorods and nanoparticles were prepared by a facile solvothermal method with or without nitric acid. The crystal phase, morphology, and microstructure of the samples were characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy and the nitrogen adsorption isotherms. The NaBi(MoO4)2 nanorods and nanoparticles were tetragonal scheelite nanocrystals, and the nanorods were composed of 4–6 spheritic nanograins which were about 19 nm in diameter. The nanoparticles were aggregated randomly by 25 nm NaBi(MoO4)2 crystallites. Both NaBi(MoO4)2 nanorods and nanoparticles were mesopore structure. The sensors based on NaBi(MoO4)2 nanorods and nanoparticles exhibited high gas-sensing response (30.5 and 24.7) to 100 ppm n-butanol at optimal operating temperature of 370 °C.The composites of Fe-doped NaBi(MoO4)2 nanorods were prepared, and they showed better gas-sensing performances than pure NaBi(MoO4)2 nanorods due to promoting oxygen adsorption and catalysis by Fe doped. The highest sensitivity of the sensor based on 1 wt% Fe-doped NaBi(MoO4)2 nanorods was 48.4 to 100 ppm n-butanol at 300 °C.

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Acknowledgments

The authors are grateful for financial support from Guangxi Key Laboratory of Information Materials (191004-K).

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Authors and Affiliations

  1. Hubei Key Laboratory of Plasma Chemistry and Advanced Materials, Wuhan Institute of Technology, Wuhan, 430073, China

    Zhen Shang, Siyu Wang & Zhidong Lin

  2. Zhongshan Branch of State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, Zhongshan Institute, Zhongshan, 528402, People’s Republic of China

    Liming Liu & Feng Chi

  3. Guangxi Key Laboratory of Information Materials, Guilin University of Electronic Technology, Guilin, 541004, People’s Republic of China

    Xiaowen Zhang

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  1. Zhen Shang
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  2. Siyu Wang
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  3. Zhidong Lin
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  4. Liming Liu
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Correspondence to Zhidong Lin.

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Shang, Z., Wang, S., Lin, Z. et al. Preparation of Fe-doped NaBi(MoO4)2 nanorods and their improved gas-sensing properties. J Mater Sci: Mater Electron 31, 22143–22150 (2020). https://doi.org/10.1007/s10854-020-04716-6

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  • DOI: https://doi.org/10.1007/s10854-020-04716-6

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