Adsorption Properties of the C2H2 Characteristic Gas in Oil by Doped MoS2

被引：0
|
作者：
Wang J. [1 ]
Zhou Q. [1 ,2 ]
Gui Y. [1 ]
Xu L. [1 ]
Chen W. [2 ]
机构：
[1] College of Engineering and Technology, Southwest University, Chongqing
[2] State Key Laboratory of Power Transmission Equipment & System Security and New Technology, Chongqing University, Chongqing
来源：
Gaodianya Jishu/High Voltage Engineering | 2020年 / 46卷 / 06期
基金：
中国国家自然科学基金;
关键词：
C[!sub]2[!/sub]H[!sub]2[!/sub; Characteristic fault gases in oil; First principles; Molybdenum sulfide; Noble metal dopant;
D O I：
10.13336/j.1003-6520.hve.20200615014
中图分类号：
学科分类号：
摘要：
Acetylene (C2H2) is one of the most important fault characteristic gases in oil-immersed transformer discharge faults. The concentration and production rate can effectively reflect the insulation performance of oil-paper power transformer. In order to realize the effective detection of C2H2 characteristic gas in oil, a method for the detection of characteristic gases in oil by metal-doped molybdenum sulfide (MoS2) based semiconductor gas sensor was proposed. Based on the first principle, the adsorption properties of C2H2 by intrinsic and noble metal (Au and Ag) doped MoS2 materials were calculated. The adsorption properties, such as adsorption energy, charge transfer, and electron state density, were calculated and compared. The results show that the adsorption of C2H2 by doped MoS2 is chemisorption, while the intrinsic MoS2 shows physical adsorption characteristics, the strength relationship is in the order of Au-MoS2 > Ag-MoS2 > MoS2. The results of theoretical calculation of adsorption characteristics are conducive to the improvement of gas-sensing mechanism of MoS2 materials and lay a foundation for sensor detection of characteristic fault gases in oil. © 2020, High Voltage Engineering Editorial Department of CEPRI. All right reserved.
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页码：1962 / 1969
页数：7
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