化工新型材料

化工新型材料 ›› 2022, Vol. 50 ›› Issue (8) : 121-125. DOI: 10.19817/j.cnki.issn1006-3536.2022.08.023

新材料与新技术

WSe₂/ZnS复合材料制备及其气敏性能

桂阳海, 王幸辉, 田宽, 钱琳琳, 郭会师

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Preparation and gas sensing property of WSe₂/ZnS nanocomposite

Gui Yanghai, Wang Xinghui, Tian Kuan, Qian Linlin, Guo Huishi

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Received
2021-04-28
Issue Date	Revised Date
2022-08-29	2021-04-28

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摘要

采用两步法和溶剂热反应,先制备硒化钨纳米花,再以硒化钨为模板,在其表面生长硫化锌纳米棒制备WSe₂/ZnS复合材料,并研究复合材料的气敏性能。通过X射线粉末衍射(XRD)和扫描电子显微镜(SEM)对合成材料进行了表征。结果显示,合成的WSe₂/ZnS复合材料在三乙胺、氨水、硫化氢、氮氧化物、三甲胺、苯胺、甲酰胺、甲醛和乙醇等气体的检测中,对三乙胺气体表现出良好的选择性和较高的灵敏度。在最佳工作温度240℃下,WSe₂/ZnS-7传感器对10×10^-6三乙胺的响应灵敏度达到10.72,其响应、恢复时间分别为7s和11s,最低检出限为0.1×10^-6。最后,对WSe₂/ZnS复合材料的气敏机理进行了讨论。该材料在气敏领域有着潜在的应用前景。

Abstract

The WSe₂/ZnS composites were prepared by two-step solvothermal reaction.First,WSe₂ nanoflowers were formed in a teflon-lined stainless steel autoclave.Then,the WSe₂/ZnS composites were prepared by growing ZnS nanorods on the surface of WSe₂ as template.The gas sensitive properties of the composites were studied.The as-synthesized materials were also characterized by X-ray powder diffraction (XRD) and scanning electron microscopy (SEM).The results demonstrated that the synthesized WSe₂/ZnS composites material had high selectivity and sensitivity for the detection of triethylamine,ammonia,hydrogen sulfide,nitrogen oxide,trimethylamine,aniline,formamide,formaldehyde,and ethanol.At the optimal working temperature of 240℃,the response of WSe₂/ZnS-7 sensor to 10 ppm triethylamine reached 10.72,and its response and recovery times were7s and 11s,respectively.The detection limit can be low to 0.1ppm.In addition,the gas sensing mechanism for the WSe₂/ZnS nanocomposites was also discussed.The obtained WSe₂/ZnS had potential applications in the gas sensing field.

关键词

气敏 / 硒化钨 / 硫化锌 / 溶剂热 / 两步法

Key words

gas sensing / WSe₂ / ZnS / solvothermal / two-step method

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WSe₂/ZnS复合材料制备及其气敏性能[J]. 化工新型材料, 2022, 50(8): 121-125 DOI:10.19817/j.cnki.issn1006-3536.2022.08.023

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