Enhanced Gas Sensor Performance of Hydrothermally Synthesized Ag@Cu2O–Si: A Study at Low Temperature with High Sensitivity Approach

IF 2.5 4区工程技术 Q3 ENGINEERING, ELECTRICAL & ELECTRONIC

Journal of Electronic Materials Pub Date : 2025-09-10 DOI:10.1007/s11664-025-12357-w

Evan T. Salim, Rana O. Mahdi, Mayyadah H. Mohsin, Iman H. Hadi, Doaa Sulaiman

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Abstract

This study presents the synthesis of a novel Ag-decorated Cu₂O nanocomposite gas sensor using a hydrothermal method for the detection of a nitrogen dioxide (NO₂) gas. Cu₂O thin films were synthesized through a 48-h hydrothermal process and subsequently decorated with the silver nanoparticles to enhance the sensor performance. The structural, morphological, and optical characterizations confirmed the successful formation of a highly crystalline Cu₂O with uniformly distributed Ag nanoparticles. Gas sensing properties were evaluated across different temperatures (100°C, 150°C, and 200°C) and two NO₂ gas concentrations (75–125 ppm). Results demonstrated that the Ag@Cu₂O–Si sensor exhibited faster response and recovery times, improved stability, and higher sensitivity compared with the bare Cu₂O sensors. The optimal sensing temperature was found to be about 100°C with sensitivity of a about 26% at 125 ppm. The enhanced performance is attributed to the synergistic effects of Ag nanoparticles, which improve surface adsorption and charge transfer kinetics. These findings suggest that the hydrothermally synthesized Ag@Cu₂O nanocomposite is a promising candidate for real-time low-temperature NO₂ detection in both environmental and industrial applications.

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水热合成Ag@Cu2O -Si增强气体传感器性能：低温高灵敏度研究

本研究采用水热法合成了一种新型ag修饰的Cu2O纳米复合气体传感器，用于检测二氧化氮（NO2）气体。通过48 h水热法制备Cu2O薄膜，并用纳米银修饰Cu2O薄膜以增强传感器性能。结构、形态和光学表征证实了具有均匀分布的银纳米颗粒的高结晶Cu2O的成功形成。在不同温度（100°C， 150°C和200°C）和两种NO2气体浓度（75-125 ppm）下评估气敏性能。结果表明，与裸Cu2O传感器相比，Ag@Cu2O -Si传感器具有更快的响应和恢复时间，更好的稳定性和更高的灵敏度。在125 ppm时，最佳传感温度约为100℃，灵敏度约为26%。这种性能的增强是由于银纳米粒子的协同作用，它改善了表面吸附和电荷转移动力学。这些发现表明，水热合成的Ag@Cu2O纳米复合材料在环境和工业应用中都是实时低温NO2检测的有希望的候选者。

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来源期刊

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.