A fast response & recovery H2S gas sensor based on α-Fe2O3 nanoparticles with ppb level detection limit

Zhi-Jie Li; Yanwu Huang; Shouchao Zhang; Weimei Chen; Zhong Kuang; Dongyi Ao; Wei Liu; Yong Qing Fu

doi:10.1016/j.jhazmat.2015.07.003

A fast response & recovery H2S gas sensor based on α-Fe2O3 nanoparticles with ppb level detection limit

Zhi-Jie Li, Yanwu Huang, Shouchao Zhang, Weimei Chen, Zhong Kuang, Dongyi Ao, Wei Liu, Yong Qing Fu

Mathematics, Physics and Electrical Engineering

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Abstract

H2S gas sensor based on α-Fe2O3 nanoparticles was fabricated by post-thermal annealing of Fe3O4 precursor which was synthesized using a facile hydrothermal route. The characteristic techniques including X-ray diffraction (XRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM) were adopted to characterize the chemical composition and microstructure of the obtained samples. Gas-sensing performance of the sensor was investigated at different operation temperatures from 100 °C to 400 °C. Results showed that the sensor exhibited the best sensitivity, reproducibility and long-term stability for detecting H2S gas at an operating temperature of 300 °C. The detection limit towards H2S gas was 0.05 ppm, and the response time and recovery time was 30 s and 5 s, respectively. In addition, sensing mechanism of the sensor towards H2S was discussed.

Original language	English
Pages (from-to)	167-174
Number of pages	8
Journal	Journal of Hazardous Materials
Volume	300
Early online date	3 Jul 2015
DOIs	https://doi.org/10.1016/j.jhazmat.2015.07.003
Publication status	Published - 30 Dec 2015

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@article{c591a2e6fe444dd09438f647692ec539,

title = "A fast response & recovery H2S gas sensor based on α-Fe2O3 nanoparticles with ppb level detection limit",

abstract = "H2S gas sensor based on α-Fe2O3 nanoparticles was fabricated by post-thermal annealing of Fe3O4 precursor which was synthesized using a facile hydrothermal route. The characteristic techniques including X-ray diffraction (XRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM) were adopted to characterize the chemical composition and microstructure of the obtained samples. Gas-sensing performance of the sensor was investigated at different operation temperatures from 100 °C to 400 °C. Results showed that the sensor exhibited the best sensitivity, reproducibility and long-term stability for detecting H2S gas at an operating temperature of 300 °C. The detection limit towards H2S gas was 0.05 ppm, and the response time and recovery time was 30 s and 5 s, respectively. In addition, sensing mechanism of the sensor towards H2S was discussed.",

keywords = "α-Fe2O3, nanoparticles, hydrothermal, H2S, gas sensor",

author = "Zhi-Jie Li and Yanwu Huang and Shouchao Zhang and Weimei Chen and Zhong Kuang and Dongyi Ao and Wei Liu and Fu, {Yong Qing}",

year = "2015",

month = dec,

day = "30",

doi = "10.1016/j.jhazmat.2015.07.003",

language = "English",

volume = "300",

pages = "167--174",

journal = "Journal of Hazardous Materials",

issn = "0304-3894",

publisher = "Elsevier",

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TY - JOUR

T1 - A fast response & recovery H2S gas sensor based on α-Fe2O3 nanoparticles with ppb level detection limit

AU - Li, Zhi-Jie

AU - Huang, Yanwu

AU - Zhang, Shouchao

AU - Chen, Weimei

AU - Kuang, Zhong

AU - Ao, Dongyi

AU - Liu, Wei

AU - Fu, Yong Qing

PY - 2015/12/30

Y1 - 2015/12/30

N2 - H2S gas sensor based on α-Fe2O3 nanoparticles was fabricated by post-thermal annealing of Fe3O4 precursor which was synthesized using a facile hydrothermal route. The characteristic techniques including X-ray diffraction (XRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM) were adopted to characterize the chemical composition and microstructure of the obtained samples. Gas-sensing performance of the sensor was investigated at different operation temperatures from 100 °C to 400 °C. Results showed that the sensor exhibited the best sensitivity, reproducibility and long-term stability for detecting H2S gas at an operating temperature of 300 °C. The detection limit towards H2S gas was 0.05 ppm, and the response time and recovery time was 30 s and 5 s, respectively. In addition, sensing mechanism of the sensor towards H2S was discussed.

AB - H2S gas sensor based on α-Fe2O3 nanoparticles was fabricated by post-thermal annealing of Fe3O4 precursor which was synthesized using a facile hydrothermal route. The characteristic techniques including X-ray diffraction (XRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM) were adopted to characterize the chemical composition and microstructure of the obtained samples. Gas-sensing performance of the sensor was investigated at different operation temperatures from 100 °C to 400 °C. Results showed that the sensor exhibited the best sensitivity, reproducibility and long-term stability for detecting H2S gas at an operating temperature of 300 °C. The detection limit towards H2S gas was 0.05 ppm, and the response time and recovery time was 30 s and 5 s, respectively. In addition, sensing mechanism of the sensor towards H2S was discussed.

KW - α-Fe2O3

KW - nanoparticles

KW - hydrothermal

KW - H2S

KW - gas sensor

U2 - 10.1016/j.jhazmat.2015.07.003

DO - 10.1016/j.jhazmat.2015.07.003

M3 - Article

VL - 300

SP - 167

EP - 174

JO - Journal of Hazardous Materials

JF - Journal of Hazardous Materials

SN - 0304-3894

ER -

A fast response & recovery H2S gas sensor based on α-Fe2O3 nanoparticles with ppb level detection limit

Abstract

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