Ultra-High Response Detection of Alcohols Based on CdS/MoS2 Composite

Lei Liu; Weiye Yang; Hui Zhang; Xueqian Yan; Yingkai Liu

doi:10.1186/s11671-021-03647-3

Ultra-High Response Detection of Alcohols Based on CdS/MoS₂ Composite

Nanoscale Res Lett. 2022 Jan 6;17(1):7. doi: 10.1186/s11671-021-03647-3.

Authors

Lei Liu^{1

2}, Weiye Yang^{1

2}, Hui Zhang^{1

2}, Xueqian Yan^{1

2}, Yingkai Liu^{3

4

5}

Affiliations

¹ Yunnan Key Laboratory of Opto-Electronic Information Technology, Yunnan Normal University, Kunming, 650500, China.
² Institute of Physics and Electronic Information, Yunnan Normal University, Kunming, 650500, China.
³ Yunnan Key Laboratory of Opto-Electronic Information Technology, Yunnan Normal University, Kunming, 650500, China. ykliu@ynnu.edu.cn.
⁴ Institute of Physics and Electronic Information, Yunnan Normal University, Kunming, 650500, China. ykliu@ynnu.edu.cn.
⁵ Key Laboratory of Advanced Technique and Preparation for Renewable Energy Materials, Ministry of Education, Yunnan Normal University, Kunming, 650500, China. ykliu@ynnu.edu.cn.

Abstract

Hybrid CdS/MoS₂ with branch and leaf shaped structures are successfully synthesized by hydrothermal method. It is applied to detect volatile organic compounds, a basic source of indoor air pollution with deleterious effects on the human health. The sensor based on CdS/MoS₂ displays an outstanding response to alcohols among numerous gases. Their response to 100 ppm ethanol and isopropanol reaches 56 and 94, respectively. Benefiting from the dendrite-like biomimetic structure and synergy effect of CdS and MoS₂, the sensor exhibits higher response than traditional gas sensor. For multiple alcohols, the limit of detection reached ppb level. In addition, by comparing the response of ethanol, isopropanol, isoamyl alcohol and their mixtures with acetone and methanal, a strong resistance interference is observed. This work proved that the modified detector holds broad promise in the detection of alcohols.

Keywords: Alcohols detection; Biomimetic framework; Cadmium sulfide; Gas sensor; Molybdenum disulfide.

Abstract

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