Pt掺杂ZnSnO<sub>3</sub>纳米立方体对ppb级NO<sub>2</sub>的敏感强化研究

殷尧禹; 沈岩柏; 赵思凯; 李昂; 卢瑞; 韩聪; 崔宝玉; 魏德洲

doi:10.1007/s12613-020-2215-9

Volume 29 Issue 6

Jun. 2022

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文章导航 > 矿物冶金与材料学报（英文） > 2022 > 29(6): 1295-1303

Yaoyu Yin, Yanbai Shen, Sikai Zhao, Ang Li, Rui Lu, Cong Han, Baoyu Cui, and Dezhou Wei, Enhanced detection of ppb-level NO₂ by uniform Pt-doped ZnSnO₃ nanocubes, Int. J. Miner. Metall. Mater., 29(2022), No. 6, pp. 1295-1303. https://doi.org/10.1007/s12613-020-2215-9

Cite this article as:

Yaoyu Yin, Yanbai Shen, Sikai Zhao, Ang Li, Rui Lu, Cong Han, Baoyu Cui, and Dezhou Wei, Enhanced detection of ppb-level NO2 by uniform Pt-doped ZnSnO3 nanocubes, Int. J. Miner. Metall. Mater., 29(2022), No. 6, pp. 1295-1303. https://doi.org/10.1007/s12613-020-2215-9

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研究论文

Pt掺杂ZnSnO₃纳米立方体对ppb级NO₂的敏感强化研究

1)
东北大学资源与土木工程学院，沈阳 110819，中国
2)
轧制技术及连轧自动化国家重点实验室，沈阳 110819，中国

通讯作者:
沈岩柏 E-mail: shenyanbai@mail.neu.edu.cn

赵思凯 E-mail: zhaosikai@mail.neu.edu.cn

文章亮点

(1) 通过一步水热法优化制备出Pt掺杂的钙钛矿型ZnSnO₃纳米立方体。

(2) Pt掺杂显著提高了ZnSnO₃纳米立方体对NO₂的敏感性能，实现了对ppb级NO₂的高效检测。

(3) 综合电子敏化和化学敏化效应，阐述了Pt掺杂对ZnSnO₃纳米立方体NO₂敏感性能的增强机理。

中文摘要

采用简易的一步水热法优化合成出不同Pt浓度掺杂的钙钛矿型ZnSnO₃纳米立方体（ZSNCs），并利用XRD、SEM、TEM、EDS和XPS等表征手段对所制备材料的晶体结构、微观形貌、表面特性等进行了详细的分析表征。研究发现，所制备的Pt掺杂ZSNCs纳米立方体形貌均一，边长约为 400 nm，引入的Pt以PtO和PtO₂的形式均匀负载在ZSNCs纳米立方体的表面上。以所获Pt掺杂ZSNCs纳米立方体为敏感材料制备出气敏元件，并详细研究了其气敏特性。结果表明，Pt掺杂可有效提升ZSNCs纳米立方体对NO₂的敏感能力，当Pt掺杂浓度为1%（Pt/Zn摩尔比）时，ZSNCs纳米立方体对NO₂具有最佳的气敏特性。在125℃的最佳工作温度下，1% Pt掺杂ZSNCs纳米立方体对500 ppb NO₂的灵敏度为16，是未掺杂ZSNCs纳米立方体的11倍，且检测下限低于50 ppb，同时气敏元件也具有优异的稳定性和NO₂选择性。结合结构表征和气敏特性测试结果，综合电子敏化和化学敏化效应阐述了Pt掺杂对ZnSnO₃纳米立方体NO₂敏感性能的增强机理，并建立了气敏反应模型。

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Research Article

Enhanced detection of ppb-level NO₂ by uniform Pt-doped ZnSnO₃ nanocubes

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Abstract

Abstract

ZnSnO₃ nanocubes (ZSNCs) with various Pt concentrations (i.e., 1at%, 2at%, and 5at%) were synthesized by a simple one-pot hydrothermal method. The microstructures of pure and Pt-doped ZSNCs were characterized by X-ray diffractometry, scanning electron microscopy, transmission electron microscopy, energy-dispersive X-ray spectroscopy, and X-ray photoelectron spectroscopy. Results showed that the pure ZSNCs have a perovskite structure with a side length of approximately 600 nm; this length was reduced to 400 nm after Pt doping. Following doping, PtO_x (PtO and PtO₂) nanoparticles with a diameter of approximately 5 nm were uniformly coated on the surface of the ZSNCs. Systematic investigation of the gas-sensing abilities of the nanocubes showed that the Pt-doped ZSNCs have excellent sensing properties toward nitrogen dioxide (NO₂) gas in the operating temperature range of 75–175°C. Among the sensors prepared, that based on 1at% Pt-doped ZSNCs exhibited the best response of 16.0 toward 500 ppb NO₂ at 125°C; this response is over 11 times higher compared with that of pure ZSNCs. The enhanced NO₂ sensing mechanism of the Pt-doped ZSNCs may be attributed to the synergistic effects of catalytic activity and chemical sensitization by Pt doping.
- ZnSnO₃ nanocubes;
- Pt doping;
- nitrogen dioxide;
- gas sensor

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Pt掺杂ZnSnO₃纳米立方体对ppb级NO₂的敏感强化研究

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Enhanced detection of ppb-level NO₂ by uniform Pt-doped ZnSnO₃ nanocubes

Abstract

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Pt掺杂ZnSnO3纳米立方体对ppb级NO2的敏感强化研究

文章亮点

中文摘要

Enhanced detection of ppb-level NO2 by uniform Pt-doped ZnSnO3 nanocubes

Abstract

References

数据统计

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Pt掺杂ZnSnO₃纳米立方体对ppb级NO₂的敏感强化研究

Enhanced detection of ppb-level NO₂ by uniform Pt-doped ZnSnO₃ nanocubes