{"title":"Experimental and density functional theory study of the gas sensing property of Pt and Au doped WS2 to partial discharge gas CO in air switchgear","authors":"Yu Zhang , Weiquan Feng , Wenjun Hou , Wen Zeng , Qu Zhou","doi":"10.1016/j.sna.2024.115905","DOIUrl":null,"url":null,"abstract":"<div><p>This work aims to investigate the detection performance of WS<sub>2</sub> and its doped gas sensitive materials for carbon monoxide (CO), one of the most important characteristic gases of partial discharge in air switchgear.Its accurate monitoring can be an effective evaluation of the operating condition of air switchgear. Three gas-sensitive materials were synthesized using the hydrothermal method: WS<sub>2</sub>, Pt-WS<sub>2</sub>, and Au-WS<sub>2</sub>. The materials were characterized through XRD, SEM, and XPS, followed by an evaluation of their sensing performance for CO gas. The findings revealed that the gas sensitivity of WS<sub>2</sub> was significantly enhanced through doping with Pt and Au. At a CO concentration of 10 ppm, the response sensitivity of the Pt-WS<sub>2</sub> sensor reached 4.03, while that of the Au-WS<sub>2</sub> sensor was measured at 2.68—both representing an increase by a factor of 3.52 compared to intrinsic WS<sub>2</sub> sensors. Moreover, the response recovery time for the Au-WS<sub>2</sub> sensor was found to be 20–30 s faster than that observed in Pt-WS<sub>2</sub> sensors. The mechanisms underlying the enhancement in CO adsorption on WS<sub>2</sub> due to Pt and Au doping were investigated based on density functional theory calculations encompassing band structure analysis, density of states assessment, adsorption distance measurement, and adsorption energy evaluation. This study posits that both Pt-WS<sub>2</sub> and Au-WS<sub>2</sub> can be used for the detection of partial discharge gas CO in air switchgear.</p></div>","PeriodicalId":21689,"journal":{"name":"Sensors and Actuators A-physical","volume":"379 ","pages":"Article 115905"},"PeriodicalIF":4.9000,"publicationDate":"2024-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Sensors and Actuators A-physical","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0924424724008999","RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"ENGINEERING, ELECTRICAL & ELECTRONIC","Score":null,"Total":0}
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Abstract
This work aims to investigate the detection performance of WS2 and its doped gas sensitive materials for carbon monoxide (CO), one of the most important characteristic gases of partial discharge in air switchgear.Its accurate monitoring can be an effective evaluation of the operating condition of air switchgear. Three gas-sensitive materials were synthesized using the hydrothermal method: WS2, Pt-WS2, and Au-WS2. The materials were characterized through XRD, SEM, and XPS, followed by an evaluation of their sensing performance for CO gas. The findings revealed that the gas sensitivity of WS2 was significantly enhanced through doping with Pt and Au. At a CO concentration of 10 ppm, the response sensitivity of the Pt-WS2 sensor reached 4.03, while that of the Au-WS2 sensor was measured at 2.68—both representing an increase by a factor of 3.52 compared to intrinsic WS2 sensors. Moreover, the response recovery time for the Au-WS2 sensor was found to be 20–30 s faster than that observed in Pt-WS2 sensors. The mechanisms underlying the enhancement in CO adsorption on WS2 due to Pt and Au doping were investigated based on density functional theory calculations encompassing band structure analysis, density of states assessment, adsorption distance measurement, and adsorption energy evaluation. This study posits that both Pt-WS2 and Au-WS2 can be used for the detection of partial discharge gas CO in air switchgear.
期刊介绍：
Sensors and Actuators A: Physical brings together multidisciplinary interests in one journal entirely devoted to disseminating information on all aspects of research and development of solid-state devices for transducing physical signals. Sensors and Actuators A: Physical regularly publishes original papers, letters to the Editors and from time to time invited review articles within the following device areas:
• Fundamentals and Physics, such as: classification of effects, physical effects, measurement theory, modelling of sensors, measurement standards, measurement errors, units and constants, time and frequency measurement. Modeling papers should bring new modeling techniques to the field and be supported by experimental results.
• Materials and their Processing, such as: piezoelectric materials, polymers, metal oxides, III-V and II-VI semiconductors, thick and thin films, optical glass fibres, amorphous, polycrystalline and monocrystalline silicon.
• Optoelectronic sensors, such as: photovoltaic diodes, photoconductors, photodiodes, phototransistors, positron-sensitive photodetectors, optoisolators, photodiode arrays, charge-coupled devices, light-emitting diodes, injection lasers and liquid-crystal displays.
• Mechanical sensors, such as: metallic, thin-film and semiconductor strain gauges, diffused silicon pressure sensors, silicon accelerometers, solid-state displacement transducers, piezo junction devices, piezoelectric field-effect transducers (PiFETs), tunnel-diode strain sensors, surface acoustic wave devices, silicon micromechanical switches, solid-state flow meters and electronic flow controllers.
Etc...
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