Enhanced NH 3 gas-sensing performance of silica modified CeO 2 nanostructure based sensors

Junqiang Wang; Zhijie Li; Sa Zhang; Shengnan Yan; Baobao Cao; Zhiguo Wang; Yong Qing Fu

doi:10.1016/j.snb.2017.08.149

Enhanced NH 3 gas-sensing performance of silica modified CeO 2 nanostructure based sensors

Junqiang Wang, Zhijie Li, Sa Zhang, Shengnan Yan, Baobao Cao, Zhiguo Wang, Yong Qing Fu

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Abstract

The silica modified CeO2 gas sensing nanomaterials are synthesized using a sol-hydrothermal route. The 8%silica-CeO2 has larger specific surface areas of 83.75 m2/g and smaller crystalline size of 11.5 nm than pure CeO2, respectively. Compared to pure CeO2, the 8%silica-CeO2 based gas sensor exhibits significant enhancement NH3 gas-sensing performance. At room temperature, it shows much better gas response of 3244% to 80 ppm of NH3 gas and lower detection limit (0.5 ppm) towards NH3 gas. It is also found that the gas response of the NH3 gas sensors increases linearly with the increase of NH3 gas concentration. Moreover, the NH3 gas sensor have good reversibility, stability and selectivity. The reason of enhanced NH3 gas-sensing performance is not only because of the increased specific surface areas, but also due to the electrolytic conductivity of NH4+ and OH− on the surface.

Original language	English
Pages (from-to)	862-870
Journal	Sensors and Actuators B: Chemical
Volume	255
Issue number	Part 1
Early online date	24 Aug 2017
DOIs	https://doi.org/10.1016/j.snb.2017.08.149
Publication status	Published - 1 Feb 2018

Keywords

CeO2
Gas sensor
Silica
Hydrothermal
NH3

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SENSOR BAccepted author manuscript, 1.4 MB

https://doi.org/10.1016/j.snb.2017.08.149

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@article{f5b59f8c78e146bbbf81edef6b79b761,

title = "Enhanced NH 3 gas-sensing performance of silica modified CeO 2 nanostructure based sensors",

abstract = "The silica modified CeO2 gas sensing nanomaterials are synthesized using a sol-hydrothermal route. The 8\%silica-CeO2 has larger specific surface areas of 83.75 m2/g and smaller crystalline size of 11.5 nm than pure CeO2, respectively. Compared to pure CeO2, the 8\%silica-CeO2 based gas sensor exhibits significant enhancement NH3 gas-sensing performance. At room temperature, it shows much better gas response of 3244\% to 80 ppm of NH3 gas and lower detection limit (0.5 ppm) towards NH3 gas. It is also found that the gas response of the NH3 gas sensors increases linearly with the increase of NH3 gas concentration. Moreover, the NH3 gas sensor have good reversibility, stability and selectivity. The reason of enhanced NH3 gas-sensing performance is not only because of the increased specific surface areas, but also due to the electrolytic conductivity of NH4+ and OH− on the surface.",

keywords = "CeO2, Gas sensor, Silica, Hydrothermal, NH3",

author = "Junqiang Wang and Zhijie Li and Sa Zhang and Shengnan Yan and Baobao Cao and Zhiguo Wang and Fu, \{Yong Qing\}",

year = "2018",

month = feb,

day = "1",

doi = "10.1016/j.snb.2017.08.149",

language = "English",

volume = "255",

pages = "862--870",

journal = "Sensors and Actuators B: Chemical",

issn = "0925-4005",

publisher = "Elsevier B.V.",

number = "Part 1",

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TY - JOUR

T1 - Enhanced NH 3 gas-sensing performance of silica modified CeO 2 nanostructure based sensors

AU - Wang, Junqiang

AU - Li, Zhijie

AU - Zhang, Sa

AU - Yan, Shengnan

AU - Cao, Baobao

AU - Wang, Zhiguo

AU - Fu, Yong Qing

PY - 2018/2/1

Y1 - 2018/2/1

N2 - The silica modified CeO2 gas sensing nanomaterials are synthesized using a sol-hydrothermal route. The 8%silica-CeO2 has larger specific surface areas of 83.75 m2/g and smaller crystalline size of 11.5 nm than pure CeO2, respectively. Compared to pure CeO2, the 8%silica-CeO2 based gas sensor exhibits significant enhancement NH3 gas-sensing performance. At room temperature, it shows much better gas response of 3244% to 80 ppm of NH3 gas and lower detection limit (0.5 ppm) towards NH3 gas. It is also found that the gas response of the NH3 gas sensors increases linearly with the increase of NH3 gas concentration. Moreover, the NH3 gas sensor have good reversibility, stability and selectivity. The reason of enhanced NH3 gas-sensing performance is not only because of the increased specific surface areas, but also due to the electrolytic conductivity of NH4+ and OH− on the surface.

AB - The silica modified CeO2 gas sensing nanomaterials are synthesized using a sol-hydrothermal route. The 8%silica-CeO2 has larger specific surface areas of 83.75 m2/g and smaller crystalline size of 11.5 nm than pure CeO2, respectively. Compared to pure CeO2, the 8%silica-CeO2 based gas sensor exhibits significant enhancement NH3 gas-sensing performance. At room temperature, it shows much better gas response of 3244% to 80 ppm of NH3 gas and lower detection limit (0.5 ppm) towards NH3 gas. It is also found that the gas response of the NH3 gas sensors increases linearly with the increase of NH3 gas concentration. Moreover, the NH3 gas sensor have good reversibility, stability and selectivity. The reason of enhanced NH3 gas-sensing performance is not only because of the increased specific surface areas, but also due to the electrolytic conductivity of NH4+ and OH− on the surface.

KW - CeO2

KW - Gas sensor

KW - Silica

KW - Hydrothermal

KW - NH3

UR - https://www.scopus.com/pages/publications/85028372364

U2 - 10.1016/j.snb.2017.08.149

DO - 10.1016/j.snb.2017.08.149

M3 - Article

SN - 0925-4005

VL - 255

SP - 862

EP - 870

JO - Sensors and Actuators B: Chemical

JF - Sensors and Actuators B: Chemical

IS - Part 1

ER -

Enhanced NH 3 gas-sensing performance of silica modified CeO 2 nanostructure based sensors

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Keywords

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