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

IF 2.7 4区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Letters Pub Date : 2025-02-06 DOI:10.1016/j.matlet.2025.138193

Ryangha Kim, Kyung-eun Kim, Younglae Kim

引用次数: 0

Abstract

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 drop-coating 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.

查看原文本刊更多论文

求助全文

约1分钟内获得全文求助全文

来源期刊

Materials Letters 工程技术-材料科学：综合

CiteScore

5.60

自引率

3.30%

发文量

1948

审稿时长

50 days

期刊介绍： Materials Letters has an open access mirror journal Materials Letters: X, sharing the same aims and scope, editorial team, submission system and rigorous peer review. Materials Letters is dedicated to publishing novel, cutting edge reports of broad interest to the materials community. The journal provides a forum for materials scientists and engineers, physicists, and chemists to rapidly communicate on the most important topics in the field of materials. Contributions include, but are not limited to, a variety of topics such as: • Materials - Metals and alloys, amorphous solids, ceramics, composites, polymers, semiconductors • Applications - Structural, opto-electronic, magnetic, medical, MEMS, sensors, smart • Characterization - Analytical, microscopy, scanning probes, nanoscopic, optical, electrical, magnetic, acoustic, spectroscopic, diffraction • Novel Materials - Micro and nanostructures (nanowires, nanotubes, nanoparticles), nanocomposites, thin films, superlattices, quantum dots. • Processing - Crystal growth, thin film processing, sol-gel processing, mechanical processing, assembly, nanocrystalline processing. • Properties - Mechanical, magnetic, optical, electrical, ferroelectric, thermal, interfacial, transport, thermodynamic • Synthesis - Quenching, solid state, solidification, solution synthesis, vapor deposition, high pressure, explosive