In this work, the acetaldehyde (CHCHO) sensing performance of Copper(II) oxide nanoparticles/reduced Graphite oxide/Graphene composite structure (CuO NPs/rGO/G) was systematically studied. Firstly, CuO NPs/rGO composite nanostructures were prepared by hydrothermal synthesis, Then, CuO NPs/rGO was uniformly deposited on graphene film to prepare CuO NPs/rGO/G composite structure. CHCHO sensing tests have shown that the CuO NPs/rGO/G composite structure exhibits a fast and highly sensitive response to CHCHO at room temperature. At the test concentration of 100 ppm CHCHO, the response of CuO NPs/rGO/G composite structure is 39.94 times that of graphene, 11.37 times that of CuO NPs/rGO, and 5.90 times that of CuO NPs, up to 82.67 %. The response time is only 22 seconds, the recovery time is 159 seconds, and its theoretical limit of detection is 95.10 ppb. In addition, the CuO NPs/rGO/G composite structure has excellent selectivity, repeatability, and long-term stability for the sensing of CHCHO. The CuO NPs/rGO/G composite structure studied in this paper solves the problems of poor response, slow response, slow desorption and even inability to desorption of graphene in CHCHO sensing, and has great application potential in respiratory VOCs detection, environmental harmful gas detection, etc.

中文翻译：

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氧化铜/还原氧化石墨烯/石墨烯复合结构用于室温乙醛化学电阻检测

本工作系统研究了氧化铜纳米粒子/还原氧化石墨/石墨烯复合结构（CuO NPs/rGO/G）的乙醛（CHCHO）传感性能。首先，通过水热合成法制备了CuO NPs/rGO复合纳米结构，然后将CuO NPs/rGO均匀沉积在石墨烯薄膜上，制备了CuO NPs/rGO/G复合结构。 CHCHO传感测试表明，CuO NPs/rGO/G复合结构在室温下对CHCHO表现出快速且高度灵敏的响应。在100 ppm CHCHO浓度下，CuO NPs/rGO/G复合结构的响应分别是石墨烯的39.94倍、CuO NPs/rGO的11.37倍、CuO NPs的5.90倍，高达82.67%。响应时间仅为22秒，恢复时间为159秒，理论检测限为95.10 ppb。此外，CuO NPs/rGO/G复合结构对于CHCHO的传感具有优异的选择性、重复性和长期稳定性。本文研究的CuO NPs/rGO/G复合结构解决了石墨烯在CHCHO传感中响应差、响应慢、解吸慢甚至无法解吸的问题，在呼吸VOCs检测、环境有害气体检测等方面具有巨大的应用潜力， ETC。