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

被引：24

作者：

Yamini, K. ^{[1
]}

Renganathan, B. ^{[2
]}

Ganesan, A. R. ^{[2
]}

Prakash, T. ^{[1
]}

机构：

[1] Univ Madras, Natl Ctr Nanosci & Nanotechnol, Guindy Campus, Madras 600025, Tamil Nadu, India

[2] Indian Inst Technol Madras, Appl Opt Lab, Madras 600036, Tamil Nadu, India

来源：

OPTICAL FIBER TECHNOLOGY | 2017年 / 36卷

关键词：

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

D O I：

10.1016/j.yofte.2017.03.011

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

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.

引用

页码：139 / 143

页数：5

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