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Clad modified optical fiber gas sensors based on nanocrystalline nickel oxide embedded coatings

机译:基于纳米晶氧化镍嵌入式涂层的复合光纤传感器

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摘要

A clad modified optical fiber gas sensor for sensing volatile organic compound vapours (VOCs) such as formaldehyde (HCHO), ammonia (NH3), ethanol (C2H5OH) and methanol (CH3OH) up to 500 ppm was studied using nanocrystalline nickel oxide embedded coatings. Prior to the measurements, nickel oxide in two different crystallite sizes such as 24 nm and 76 nm was synthesized by calcination of reverse precipitated nickel hydroxide subsequently at 450 degrees C and 900 degrees C for 30 min. Then, samples physical properties were characterized using X-ray diffraction (XRD), thermogravimetric analysis (TGA), Fourier transform infrared spectroscopy (FTIR), field emission scanning electron microscopy (FESEM) and high resolution transmission electron microscopy (HRTEM). Our gas sensing measurement concludes that the lower crystallite size (24 nm) nickel oxide nanocrystals exhibits superior performance to formaldehyde and ethanol vapours as compared with other two VOCs, the observed experimental results were discussed in detail. (C) 2017 Elsevier Inc. All rights reserved.
机译:使用纳米晶态氧化镍嵌入涂层,研究了一种用于感测高达500 ppm的挥发性有机化合物蒸气(VOC),例如甲醛(HCHO),氨(NH3),乙醇(C2H5OH)和甲醇(CH3OH)的复合光纤传感器。在测量之前,通过反向沉淀的氢氧化镍随后在450℃和900℃下煅烧30分钟来合成两种不同微晶尺寸例如24nm和76nm的氧化镍。然后,使用X射线衍射(XRD),热重分析(TGA),傅里叶变换红外光谱(FTIR),场发射扫描电子显微镜(FESEM)和高分辨率透射电子显微镜(HRTEM)对样品的物理性质进行表征。我们的气体传感测量得出的结论是,与其他两种VOC相比,较低的微晶尺寸(24 nm)氧化镍纳米晶体表现出优于甲醛和乙醇蒸气的性能,对观察到的实验结果进行了详细讨论。 (C)2017 Elsevier Inc.保留所有权利。

著录项

  • 来源
    《Optical fiber technology》 |2017年第7期|139-143|共5页
  • 作者单位

    Univ Madras, Natl Ctr Nanosci & Nanotechnol, Guindy Campus, Madras 600025, Tamil Nadu, India;

    Indian Inst Technol Madras, Appl Opt Lab, Madras 600036, Tamil Nadu, India;

    Indian Inst Technol Madras, Appl Opt Lab, Madras 600036, Tamil Nadu, India;

    Univ Madras, Natl Ctr Nanosci & Nanotechnol, Guindy Campus, Madras 600025, Tamil Nadu, India;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Optical fiber gas sensors; Crystallite size effect; Formaldehyde; Ethanol;

    机译:光纤气体传感器;晶体尺寸效应;甲醛;乙醇;

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