基于 CuScO2 微片的新型丙烯酸气体传感装置的实验和理论研究

IF 2.2 4区 工程技术 Q3 ENGINEERING, ELECTRICAL & ELECTRONIC Journal of Electronic Materials Pub Date : 2024-08-28 DOI:10.1007/s11664-024-11380-7
Hai Liu, Yu Zong, Lunchao Zhong, Wenhuan Zhu
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引用次数: 0

摘要

敏感氧化物与目标气体的相互作用决定了其化学电阻信号;然而,目前缺乏基本的理论模型阻碍了其广泛应用。在这项研究中,通过简单的水热法合成了 CuScO2 微片,从而首次实现了基于氧化物的丙烯酸气体传感器。它对丙烯酸具有高选择性,性能优于其他挥发性有机化合物(VOC)气体,包括甲醇、乙醇、甲醛、甲苯、乙腈和丙酮,在 160°C 的低工作温度下,具有高响应(高达 7-10 ppm 的丙烯酸)和超低检测限(14 ppb)。与色谱技术相比,所提出的 CuScO2 气体传感器具有突出的化学电阻效应,有利于简单高效地监测对人类健康至关重要的丙烯酸气体。此外,基于微结构表征和第一原理计算以及能带分析的结果,CuScO2 卓越的气体传感特性通过一种新的机制得以阐明。与传统的环境氧离子吸附不同,固体表面的 Cu 原子和 Sc 原子分别在目标气体吸附和电子转移过程中发挥了关键作用。金属原子的这种协同效应为设计先进气体传感设备的材料系统提供了新的视角。
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Experimental and Theoretical Investigation of a Novel Acrylic Acid Gas Sensing Device Based on CuScO2 Microsheets

The interaction of a sensitive oxide with a target gas determines its chemiresistive signal; however, the lack of a fundamental theoretical model currently hinders its wide application. In this work, CuScO2 microsheets are synthesized by a simple hydrothermal method, which brings about the first oxide-based acrylic acid gas sensor. It exhibits high selectivity for acrylic acid, outperforming other volatile organic compound (VOC) gases, including methanol, ethanol, formaldehyde, toluene, acetonitrile, and acetone, with a high response (up to 7–10 ppm acrylic acid) and an ultralow detection limit down to sub-ppm level (14 ppb) at a low operating temperature of 160°C. Compared to the chromatographic techniques, the proposed CuScO2 gas sensor represents a prominent chemiresistive effect favorable for the simple and efficient monitoring of acrylic acid gas, which is significant for human health. In addition, the remarkable gas sensing properties of CuScO2 are elucidated by a new mechanism based on the results of microstructural characterization and first-principles calculations followed by energy band analysis. Instead of the classic ambient oxygen ionosorption, Cu and Sc atoms on the solid surface play the crucial roles in target gas adsorption and electron transfer procedures, respectively. Such synergistic effect of metal atoms offers a new perspective for the design of material systems for advanced gas sensing devices.

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来源期刊
Journal of Electronic Materials
Journal of Electronic Materials 工程技术-材料科学:综合
CiteScore
4.10
自引率
4.80%
发文量
693
审稿时长
3.8 months
期刊介绍: The Journal of Electronic Materials (JEM) reports monthly on the science and technology of electronic materials, while examining new applications for semiconductors, magnetic alloys, dielectrics, nanoscale materials, and photonic materials. The journal welcomes articles on methods for preparing and evaluating the chemical, physical, electronic, and optical properties of these materials. Specific areas of interest are materials for state-of-the-art transistors, nanotechnology, electronic packaging, detectors, emitters, metallization, superconductivity, and energy applications. Review papers on current topics enable individuals in the field of electronics to keep abreast of activities in areas peripheral to their own. JEM also selects papers from conferences such as the Electronic Materials Conference, the U.S. Workshop on the Physics and Chemistry of II-VI Materials, and the International Conference on Thermoelectrics. It benefits both specialists and non-specialists in the electronic materials field. A journal of The Minerals, Metals & Materials Society.
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