Hybrid Fe2O3/CNT Thin Films for Gas Sensor Applications

2018 International Conference on Engineering, Applied Sciences, and Technology (ICEAST) Pub Date : 2018-07-01 DOI:10.1109/ICEAST.2018.8434510

B. Chaitongrat, S. Chaisitsak

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引用次数: 1

Abstract

Thin films of Fe nanoparticles (NPs)/CNT networks were synthesized through vertical floating catalyst chemical vapor deposition technique (FC-CVD) and collected directly onto a cellulose membrane filter. Fe NPs/CNT films were transferred onto glass (or Si) substrates simply by dissolving filters, and then annealed in air at a low temperature for 8 hrs to create Fe2O3 NPs. The effect of annealing temperature ranging from 150 to 550°C on the morphology and structures of the Fe2O3/CNTs films was investigated by field emission scanning electron microscopy (FE-SEM), thermogravimetric analysis (TGA), differential thermal analysis (DTA), X-ray photoelectron spectroscopy (XPS) and Raman spectroscopy. Fe2O3/CNTs film-based sensors were tested against LPG gas under room temperature. LPG sensing-performance (sensor response and response/recovery time) of the Fe2O3/CNTs films-based sensor varied depending on the annealing temperature. The results of this study reinforce the potential of hybrid Fe2O3/CNTs films as a sensing material for LPG detection at low operating temperature.

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用于气体传感器的Fe2O3/CNT杂化薄膜

采用垂直悬浮催化剂化学气相沉积技术(FC-CVD)合成了铁纳米颗粒/碳纳米管网络薄膜，并将其直接收集到纤维素膜过滤器上。通过溶解滤光片将Fe NPs/CNT薄膜转移到玻璃(或Si)衬底上，然后在空气中低温退火8小时以生成Fe2O3 NPs。采用场发射扫描电镜(FE-SEM)、热重分析(TGA)、差热分析(DTA)、x射线光电子能谱(XPS)和拉曼光谱研究了150 ~ 550℃退火温度对Fe2O3/CNTs薄膜形貌和结构的影响。Fe2O3/CNTs薄膜传感器在室温下对LPG气体进行了测试。基于Fe2O3/CNTs薄膜的传感器的LPG传感性能(传感器响应和响应/恢复时间)随退火温度的变化而变化。这项研究的结果增强了Fe2O3/CNTs杂化薄膜作为低温检测LPG传感材料的潜力。

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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2018 International Conference on Engineering, Applied Sciences, and Technology (ICEAST)

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