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Improved ethanol gas-sensing properties of optimum Fe–ZnO mesoporous nanoparticles

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Abstract

Fe-doped ZnO (Fe–ZnO) mesoporous nanoparticles have been synthesized via a facile hydrothermal method, which utilizes pluronic triblock copolymer polyethylene glycol–polypropylene glycol–polyethylene glycol (PEO-PPO-PEO) as the pore-forming agent. Fe–ZnO composites have an unique porous structure. Their pore sizes increase with Fe-doping concentration and reach a maximum as Fe concentration is 15 at.%; the specific surface area of synthesized mesoporous Fe–ZnO nanoparticles reaches a maximum as the Fe concentration is about 11 at.%. Electron microscopy, vapor pressure isotherm measurements and photoluminescence (PL) were used to characterize synthesized Fe–ZnO composites. Fe–ZnO-based gas sensors exhibit excellent response in detecting ethanol; the sensing response of Fe(11 at.%)–ZnO reaches 319.8, which is significantly higher than most of the ZnO-based gaseous sensors. The improved sensitivity is ascribed to the increase of oxygen-related defects and specific surface area of Fe–ZnO composites.

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Funding

This funding was supported by National Natural Science Foundation of China (Grant No. 11775139, No.11375112), Shanghai City Committee of Science and Technology (Grant No. 15520500200), Water Resources Department of Guangdong Province (CN) (Grant No. XJ2016126) and UMKC’s Funding for Excellency grant.

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Authors and Affiliations

  1. School of Materials Science and Engineering, Shanghai University, Shanghai, 200072, China

    Yue Shen, Qinyi Li, Tai Li, Meng Cao, Feng Gu & Linjun Wang

  2. Department of Physics and Astronomy, University of Missouri-Kansas City, Kansas City, MO, 64110, USA

    Da-Ming Zhu

Authors
  1. Yue Shen
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  2. Qinyi Li
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  3. Tai Li
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  4. Meng Cao
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  5. Feng Gu
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  7. Da-Ming Zhu
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Correspondence to Yue Shen.

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Shen, Y., Li, Q., Li, T. et al. Improved ethanol gas-sensing properties of optimum Fe–ZnO mesoporous nanoparticles. J Mater Sci: Mater Electron 31, 3074–3083 (2020). https://doi.org/10.1007/s10854-019-02852-2

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