In-situ growth of CuO nanorods on sensing electrodes and their gas sensing properties of VOCs

IF 5.1 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Ceramics International Pub Date : 2024-09-26 DOI:10.1016/j.ceramint.2024.09.336

Xiangxiang Chen , Shiyi Huang , Zhaoyang Zhang , Lu Qiu , Fangzheng Liu , Tianhao Liu , Yunfei Ouyang , Yanbai Shen

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Abstract

The CuO nanorods were in-situ grown on sensing electrodes by a chemical bath method for the detection of volatile organic compounds (VOCs). The synthesized material was characterized by using X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), and Fourier-transform infrared spectroscopy (FTIR). The CuO nanorods, with lengths of 100–150 nm and diameters of 35–55 nm, were uniformly formed into a thin film on the electrode surface, with a thickness of approximately 1 μm. The gas test results demonstrated that the sensor achieved a peak response of 1.32 for formaldehyde at 200 °C, and a response of 1.92 for ethanol at 175 °C. At a concentration of 50 ppm, ethanol and formaldehyde at an operating temperature of 200 °C exhibit short response/recovery times of 28 s/48 s for ethanol and 45 s/62 s for methanol, respectively, coupled with good reproducibility. Moreover, the sensor exhibited a power-law response to varying gas concentrations and showcased superior selectivity in the VOCs gas detection. This in-situ growing CuO of our work provides a facial gas sensing material fabricated method.

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在传感电极上原位生长氧化铜纳米棒及其对挥发性有机化合物的气体传感特性

采用化学浴法在传感电极上原位生长了用于检测挥发性有机化合物（VOC）的氧化铜纳米棒。利用 X 射线衍射 (XRD)、扫描电子显微镜 (SEM)、透射电子显微镜 (TEM)、X 射线光电子能谱 (XPS) 和傅立叶变换红外光谱 (FTIR) 对合成材料进行了表征。长度为 100-150 nm、直径为 35-55 nm 的氧化铜纳米棒在电极表面均匀地形成了一层薄膜，厚度约为 1 μm。气体测试结果表明，该传感器在 200 °C 时对甲醛的峰值响应为 1.32，在 175 °C 时对乙醇的响应为 1.92。浓度为 50 ppm 时，工作温度为 200 °C 的乙醇和甲醛的响应/恢复时间较短，乙醇分别为 28 秒/48 秒，甲醇分别为 45 秒/62 秒，而且重现性良好。此外，该传感器对不同浓度的气体表现出幂律响应，在检测挥发性有机化合物气体时表现出卓越的选择性。我们工作中的这种原位生长 CuO 提供了一种面部气体传感材料的制造方法。

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来源期刊

Ceramics International 工程技术-材料科学：硅酸盐

CiteScore

9.40

自引率

15.40%

发文量

4558

审稿时长

25 days

期刊介绍： Ceramics International covers the science of advanced ceramic materials. The journal encourages contributions that demonstrate how an understanding of the basic chemical and physical phenomena may direct materials design and stimulate ideas for new or improved processing techniques, in order to obtain materials with desired structural features and properties. Ceramics International covers oxide and non-oxide ceramics, functional glasses, glass ceramics, amorphous inorganic non-metallic materials (and their combinations with metal and organic materials), in the form of particulates, dense or porous bodies, thin/thick films and laminated, graded and composite structures. Process related topics such as ceramic-ceramic joints or joining ceramics with dissimilar materials, as well as surface finishing and conditioning are also covered. Besides traditional processing techniques, manufacturing routes of interest include innovative procedures benefiting from externally applied stresses, electromagnetic fields and energetic beams, as well as top-down and self-assembly nanotechnology approaches. In addition, the journal welcomes submissions on bio-inspired and bio-enabled materials designs, experimentally validated multi scale modelling and simulation for materials design, and the use of the most advanced chemical and physical characterization techniques of structure, properties and behaviour. Technologically relevant low-dimensional systems are a particular focus of Ceramics International. These include 0, 1 and 2-D nanomaterials (also covering CNTs, graphene and related materials, and diamond-like carbons), their nanocomposites, as well as nano-hybrids and hierarchical multifunctional nanostructures that might integrate molecular, biological and electronic components.