Citation: Yu Xin, Wang Ding, Wang Yuqiu, Yan Ji, Wang Xianying. Preparation of two-dimensional molybdenum disulfide for NO₂ detection at room temperature[J]. Chinese Chemical Letters, ;2020, 31(8): 2099-2102. doi: 10.1016/j.cclet.2019.11.032 shu

Preparation of two-dimensional molybdenum disulfide for NO₂ detection at room temperature

Yu Xin ^a ,
Wang Ding ^a,*, ,
Wang Yuqiu ^a ,
Yan Ji ^b ,
Wang Xianying ^a

a.
College of Materials Science and Engineering, University of Shanghai for Science & Technology, Shanghai 200093, China
b.
School of Material and Chemical Engineering, Zhengzhou University of Light Industry, Zhengzhou 450002, China

wangding@usst.edu.cn

Received Date: 12 October 2019
Revised Date: 17 November 2019
Accepted Date: 18 November 2019
Available Online: 19 November 2019

Figures(4)

In this work, the two-dimensional MoS₂ film was prepared by sulfuring the molybdenum atomic layer on SiO₂/Si substrate. The reaction temperature, heating rate, holding time and carrier gas flow rate were investigated comprehensively. The quality of MoS₂ film was characterized by optical microscopy, atomic force microscopy, Raman and photoluminescence spectroscopy. The characterization results showed that the optimum synthesis parameters were heating rate of 25 ℃/min, reaction temperature of 750 ℃, holding time of 30 min and carrier gas velocity of 100 sccm. The MoS₂ gas sensor was fabricated and its gas sensing performance was tested. The test results indicated that the sensor had a good response to both reducing gas (NH₃) and oxidizing gas (NO₂) at room temperature. The sensitivity to 100 ppm of NO₂ was 31.3%, and the response/recovery times were 4 s and 5 s, respectively. In addition, the limit of detection could be as low as 1 ppm. This work helps us to develop low power and integrable room temperature NO₂ sensors.
- MoS₂ film,
- NO₂ detection,
- Two-dimensional materials,
- Gas sensors,
- Nanodevices,
- Room temperature detection
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Preparation of two-dimensional molybdenum disulfide for NO2 detection at room temperature

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Preparation of two-dimensional molybdenum disulfide for NO₂ detection at room temperature