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Construction of multi-walled carbon nanotubes/ZnSnO3 heterostructures for enhanced acetone sensing performance |
| Liyong Du(杜丽勇)1,† and Heming Sun(孙鹤鸣)2 |
1 Department of Materials and Chemical Engineering, Taiyuan University, Taiyuan 030032, China;
2 College of Physics, Jilin University, Changchun 130012, China |
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Abstract Carbon nanotubes (CNTs) have attracted many researcher's attention in gas sensing field because of their excellent physical and chemical properties. Herein, multi-walled carbon nanotubes (MWCNTs)/ZnSnO3 heterostructures have been obtained by a simple hydrothermal method without additional annealing process. The structural and composition information are characterized by x-ray diffraction (XRD), field-emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM) and x-ray photoelectron spectroscopy (XPS). The acetone sensing properties of pure MWCNTs, ZnSnO3 and MWCNTs/ZnSnO3 heterostructures are systematically investigated, respectively. The results show that MWCNTs/ZnSnO3 heterostructures have better sensing properties compared with pure MWCNTs and ZnSnO3 sample. Specifically, MWCNTs/ZnSnO3 heterostructures exhibit not only high responses of 24.1 and rapid response/recovery speed of 1 s/9 s to 100 ppm acetone, but also relatively good repeatability and long-term stability. The enhanced sensing performance is analyzed in detail. In addition, this work provides the experimental and theory basis for synthesis of high-performance MWCNT-based chemical sensors.
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Received: 07 June 2022
Revised: 10 August 2022
Accepted manuscript online: 16 August 2022
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PACS:
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07.07.Df
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(Sensors (chemical, optical, electrical, movement, gas, etc.); remote sensing)
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68.47.Gh
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(Oxide surfaces)
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73.40.Lq
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(Other semiconductor-to-semiconductor contacts, p-n junctions, and heterojunctions)
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| Fund: Project supported by Fundamental Research Program of Shanxi Province, China (Grant No. 202103021223004) and Fundamental Research Fund of Taiyuan University (Grant No. 21TYKQ21). |
Corresponding Authors:
Liyong Du
E-mail: 495431287@qq.com
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Cite this article:
Liyong Du(杜丽勇) and Heming Sun(孙鹤鸣) Construction of multi-walled carbon nanotubes/ZnSnO3 heterostructures for enhanced acetone sensing performance 2023 Chin. Phys. B 32 050701
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