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
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.
(Other semiconductor-to-semiconductor contacts, p-n junctions, and heterojunctions)
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
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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