Photochemical Fabrication of Ag‐Modified Hierarchical Cu@Cu2O/CuO Nanocomposite Toward Room Temperature NO2 Detection

IF 2.5 4区物理与天体物理 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Physica Status Solidi-Rapid Research Letters Pub Date : 2024-09-08 DOI:10.1002/pssr.202400223

Xin Gu, Diancheng Zhu, Shouxi Xu, Jing Hu, Miao Cheng, Tao Wei, Qianqian Liu, Ruirui Wang, Wanfei Li, Yun Ling, Bo Liu

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引用次数: 0

Abstract

Developing room temperature (RT) gas sensor based on metal oxide semiconductor material has long been challenging. Herein, a 1D hierarchical Ag‐modified Cu@Cu2O/CuO nanocomposite has been designed by low‐temperature etching self‐assembly combined with photochemical deposition method based on Cu nanowires (NWs). After a step of alkaline solution etching, the surface of Cu NWs is self‐assembled to form a hierarchical Cu@Cu2O/CuO, and then Ag nanoparticles are modified on its surface by photochemical deposition to obtain the desired material. All the preparation processes are carried out at RT and have good controllability. When applied as sensing material, the optimal Cu@Cu2O/CuO/Ag nanocomposite exhibits high response of ≈337.0 to 10 ppm NO2 with excellent selectivity and fast response/recovery (60/400 s) at 25 °C. It is worth noting that such a strategy of loading Ag nanoparticles improves its gas sensitivity by about 42.4 times, and the resulting sensor shows good sensitivity and screening ability to NO2 in the low concentration range. Finally, the nanostructure of the material is characterized systematically and the sensing mechanism is discussed.

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用光化学方法制备银修饰的分层 Cu@Cu2O/CuO 纳米复合材料，用于室温二氧化氮检测

长期以来，开发基于金属氧化物半导体材料的室温（RT）气体传感器一直是一项挑战。本文以铜纳米线（NWs）为基础，采用低温刻蚀自组装结合光化学沉积的方法，设计了一种一维分层银修饰铜@Cu2O/CuO纳米复合材料。经过一步碱性溶液蚀刻后，Cu NWs 表面自组装形成分层的 Cu@Cu2O/CuO，然后通过光化学沉积在其表面修饰 Ag 纳米颗粒，从而得到所需的材料。所有制备过程均在实时条件下进行，具有良好的可控性。最佳的 Cu@Cu2O/CuO/Ag 纳米复合材料在用作传感材料时，对 10 ppm NO2 的响应高达 ≈337.0，具有极佳的选择性和快速响应/恢复（60/400 s），温度为 25 °C。值得注意的是，这种负载银纳米粒子的策略将其气体灵敏度提高了约 42.4 倍，所制得的传感器在低浓度范围内对 NO2 具有良好的灵敏度和筛选能力。最后，对该材料的纳米结构进行了系统表征，并讨论了其传感机理。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Physica Status Solidi-Rapid Research Letters 物理-材料科学：综合

CiteScore

5.20

自引率

3.60%

发文量

208

审稿时长

1.4 months

期刊介绍： Physica status solidi (RRL) - Rapid Research Letters was designed to offer extremely fast publication times and is currently one of the fastest double peer-reviewed publication media in solid state and materials physics. Average times are 11 days from submission to first editorial decision, and 12 days from acceptance to online publication. It communicates important findings with a high degree of novelty and need for express publication, as well as other results of immediate interest to the solid-state physics and materials science community. Published Letters require approval by at least two independent reviewers. The journal covers topics such as preparation, structure and simulation of advanced materials, theoretical and experimental investigations of the atomistic and electronic structure, optical, magnetic, superconducting, ferroelectric and other properties of solids, nanostructures and low-dimensional systems as well as device applications. Rapid Research Letters particularly invites papers from interdisciplinary and emerging new areas of research.