通过从非水性溶剂中直接电沉积在芯片上制造 SnO2 气体传感器,实现超低 H2S 浓度的快速检测

IF 3.1 4区 工程技术 Q2 ELECTROCHEMISTRY
Kiem Do Van, Nguyen Van Hieu, Thomas C-K Yang and Tu Le Manh
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引用次数: 0

摘要

硫化氢(H2S)具有剧毒特性,会对人类健康和环境造成严重影响。因此,设计和开发用于检测和监测 H2S(尤其是极低浓度的 H2S)的气体传感器对科学家来说是一项具有挑战性的任务。在这项工作中,通过从乙二醇溶液中进行锡电沉积+后处理(煅烧)阶段(形成并稳定二氧化锡),成功地在芯片上直接合成了二氧化锡气体传感器。利用电化学技术对锡在铂微电极上的电沉积机理和动力学进行了深入研究。这些制备的气体传感器对 H2S 气体具有很高的选择性,在不同的工作温度下对 0.1 ppm-1 ppm 范围内的低浓度 H2S 具有有效的响应。研究还考察了电沉积条件和煅烧温度对传感器气体响应的影响。结果证明,从乙二醇溶液中电沉积的方法有望用于制造超灵敏片上气体传感器。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Rapid Detection of Ultralow H2S Concentration with on-chip Fabrication of SnO2-based Gas Sensors by Direct Electrodeposition from Non-Aqueous Solvents
Hydrogen sulfide (H2S) causes significant impacts on human health and the environment due to its highly toxic properties. Thus, the design and development of gas sensors to detect and monitor H2S (especially at extremely low concentrations) are challenging tasks for scientists. In this work, SnO2 gas sensors were successfully synthesized directly on a chip by Sn electrodeposition from ethylene glycol solutions + a post-treatment (calcination) stage (to form and stabilize SnO2). Mechanisms and kinetics of Sn electrodeposition on Pt microelectrodes were thoroughly studied using electrochemical techniques. These fabricated gas sensors exhibit a high selectivity toward H2S gas and an effective response to low-level concentrations of H2S in the range of 0.1 ppm–1 ppm at different working temperatures. The influence of electrodeposition conditions and calcination temperatures on the gas response of sensors were also examined. The results have verified that the electrodeposition method from ethylene glycol solutions is promising for the fabrication of ultrasensitive on-chip gas sensors.
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来源期刊
CiteScore
7.20
自引率
12.80%
发文量
1369
审稿时长
1.5 months
期刊介绍: The Journal of The Electrochemical Society (JES) is the leader in the field of solid-state and electrochemical science and technology. This peer-reviewed journal publishes an average of 450 pages of 70 articles each month. Articles are posted online, with a monthly paper edition following electronic publication. The ECS membership benefits package includes access to the electronic edition of this journal.
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