Ultrasensitive H2S sensor based on Cu2O/Graphene heterostructures at room temperature

IF 6.3 2区材料科学 Q2 CHEMISTRY, PHYSICAL

Applied Surface Science Pub Date : 2025-04-23 DOI:10.1016/j.apsusc.2025.163339

Zongxu Liu , Jiaxue Song , Tao Wang , Huaiqiang Liu , Jie Chen , Yuanyuan Sun , Pinhua Zhang , Guangliang Cui

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引用次数: 0

Abstract

Technology development of low-concentration H₂S sensing at low temperatures is of great significance for real-time surveillance of specific diseases and environment. In this work, a new Cu₂O/graphene heterojunction sensor with an ideal interface is fabricated by 2D electrodeposition in-situ assembly method. The sensor is extremely selective to H₂S and exhibits ultra-high H₂S sensing properties at room temperature (R = 24125.785 % for 500 ppb H₂S). Notably, the synergistic effects of barrier modulation and the sulfide reaction enable the sensor to detect H₂S at concentrations as low as 5 ppb (R = 386 %) at 20 °C. Moreover, it exhibited good gas sensitivity even at temperatures as low as −20 °C (R = 71.26346 % for 100 ppb H₂S). Furthermore, a sensor device was successfully manufactured for practical detection, which could be used for rapid detection of exhaled air and atmospheric monitoring. This work provides a new strategy for the design of high-sensitive and reliable room-temperature sensing materials for trace H₂S gas detection.

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室温下基于Cu2O/石墨烯异质结构的超灵敏H2S传感器

低温低浓度H2S传感技术的发展对特定疾病和环境的实时监测具有重要意义。在这项工作中，通过二维电沉积原位组装方法制备了一种具有理想界面的新型Cu2O/石墨烯异质结传感器。该传感器对H2S具有极高的选择性，在室温下表现出超高的H2S传感性能（R = 24125.785 % 500 ppb H2S）。值得注意的是，屏障调制和硫化物反应的协同效应使传感器能够检测浓度低至5 ppb（R = 386 %) at 20 °C.此外，即使在低至-20℃的温度下，它也表现出良好的气体敏感性 摄氏度（R=0.126346） % 对于100ppb H2S）。此外，成功制造了一种用于实际检测的传感器装置，可用于快速检测呼出空气和大气监测。这项工作为设计高灵敏度、可靠的室温传感材料用于痕量H2S气体检测提供了一种新策略。

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来源期刊

Applied Surface Science 工程技术-材料科学：膜

CiteScore

12.50

自引率

7.50%

发文量

3393

审稿时长

67 days

期刊介绍： Applied Surface Science covers topics contributing to a better understanding of surfaces, interfaces, nanostructures and their applications. The journal is concerned with scientific research on the atomic and molecular level of material properties determined with specific surface analytical techniques and/or computational methods, as well as the processing of such structures.