Synthesis and characterization of La2S3-Mercaptoacetic acid nanocomposite films for enhanced gas sensing applications

IF 4.3 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Chemistry and Physics Pub Date : 2025-03-13 DOI:10.1016/j.matchemphys.2025.130709

Mohanad Q. Kareem , Hanaa A. Muhammad , Wlla M. Mohammad

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引用次数: 0

Abstract

This investigation examines the synthesis, characterization, and sensing capabilities of mercaptoacetic acid (MMA)-functionalized lanthanum sulfide (La₂S₃) nanocomposite films for gas detection applications. The La₂S₃-MMA thin films, prepared via solvothermal synthesis, underwent comprehensive characterization through X-ray diffraction, field-emission scanning electron microscopy, and optical spectroscopy, revealing their structural, morphological, and optical characteristics. Temperature-dependent electrical measurements demonstrated distinct conductivity patterns and charge transport mechanisms within the nanocomposite structure. Performance evaluation across different operating temperatures yielded compelling results. At ambient conditions (25 °C), the films displayed a sensitivity of 28.65 % with response and recovery times of 32.67 and 19.62 s, respectively. Elevating the temperature to 100 °C enhanced sensitivity to 75 %, while modifying response dynamics (31.68s response, 29.52s recovery). Optimal sensing performance emerged at 200 °C, achieving 86.58 % sensitivity, though with an extended response time of 42.21 s and improved recovery time of 15.57 s.These findings establish MMA-functionalized La₂S₃ nanocomposite films as promising candidates for advanced gas sensing applications, demonstrating exceptional detection capabilities for volatile compounds and contributing significantly to the development of next-generation sensing technologies.

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来源期刊

Materials Chemistry and Physics 工程技术-材料科学：综合

CiteScore

8.70

自引率

4.30%

发文量

1515

审稿时长

69 days

期刊介绍： Materials Chemistry and Physics is devoted to short communications, full-length research papers and feature articles on interrelationships among structure, properties, processing and performance of materials. The Editors welcome manuscripts on thin films, surface and interface science, materials degradation and reliability, metallurgy, semiconductors and optoelectronic materials, fine ceramics, magnetics, superconductors, specialty polymers, nano-materials and composite materials.