Single-walled carbon nanotubes based hydrogen sulfide gas sensor functionalized with TEMPO

被引：1
作者：
Kim, Ryangha [1 ]
Kim, Kyung-eun [1 ]
Kim, Younglae [1 ]
机构：
[1] Gangneung Wonju Natl Univ, Dept Elect Engn, Kangnung 25457, South Korea
来源：
MATERIALS LETTERS | 2025年 / 386卷
关键词：
hydrogen sulfide; gas sensor; carbon nanotubes; functionalized; enhanced sensitivity;
D O I：
10.1016/j.matlet.2025.138193
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Hydrogen sulfide (H2S), a toxic and corrosive gas, poses significant risks in various industries and environments. This paper presents an electrochemical sensor designed for the detection of H2S within a concentration range of 0.01 ppm to 100 ppm. The sensor utilizes Single-Walled Carbon Nanotubes (SWCNTs) functionalized with 2,2,6,6-tetramethylpiperidin-1-oxyl (TEMPO) to enhance sensitivity. The fabrication process involves a straightforward method for forming the sensor surface, demonstrating the deposition of SWCNTs using a dropcoating technique. The TEMPO-functionalized sensor exhibits improved sensitivity, achieving a 120 % enhancement at 0.01 ppm compared to the non-functionalized sensor. The results indicate that the developed sensor shows promise for real-time detection of H2S at low concentrations and at room temperature.
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页数：4
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