Highly porous Fe2O3-SiO2 layer for acoustic wave based H2S sensing: mass loading or elastic loading effects?

Junsen Wang; Jian Che; Changcang Qiao; Ben Niu; Wenting Zhang; Yucheng Han; Yongqing Fu; Yongliang Tang

doi:10.2139/ssrn.4080801

Highly porous Fe2O3-SiO2 layer for acoustic wave based H2S sensing: mass loading or elastic loading effects?

Junsen Wang, Jian Che, Changcang Qiao, Ben Niu, Wenting Zhang, Yucheng Han, Yongqing Fu, Yongliang Tang^*

^*Corresponding author for this work

Mathematics, Physics and Electrical Engineering

Research output: Contribution to journal › Article › peer-review

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Abstract

A highly porous Fe 2 O 3 -SiO 2 layer prepared using sol-gel and spin-coating methods was applied on the surface of a surface acoustic wave (SAW) device for H 2 S sensing. SiO 2 in this sensing layer serves as a porous support for dispersing Fe 2 O 3 nanoparticles, and Fe 2 O 3 nanoparticles can effectively adsorb and react with H 2 S molecules. By changing the Fe/Si molar ratio in this Fe 2 O 3 -SiO 2 layer, its pore volume, pore distribution and H 2 S adsorption capacity can be adjusted, the contribution of mass loading effect and the elastic loading effect toward the frequency response of the sensor can be controlled, and the sensing performance of the sensor can be optimized. The optimized sensing response is -4.4 kHz toward 100 ppm H 2 S, with a good selectivity and reproducibility operated at room temperature (25 ℃).

Original language	English
Number of pages	27
Journal	SSRN Electronic Journal
DOIs	https://doi.org/10.2139/ssrn.4080801
Publication status	Submitted - 11 Apr 2022

Keywords

SAW sensor
H2S
Fe2O3-SiO2
Mass loading
Elastic loading

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SSRN-id4080801Submitted manuscript, 1.31 MB

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@article{89db75989fd34e5db57536f00e878b7d,

title = "Highly porous Fe2O3-SiO2 layer for acoustic wave based H2S sensing: mass loading or elastic loading effects?",

abstract = "A highly porous Fe 2 O 3 -SiO 2 layer prepared using sol-gel and spin-coating methods was applied on the surface of a surface acoustic wave (SAW) device for H 2 S sensing. SiO 2 in this sensing layer serves as a porous support for dispersing Fe 2 O 3 nanoparticles, and Fe 2 O 3 nanoparticles can effectively adsorb and react with H 2 S molecules. By changing the Fe/Si molar ratio in this Fe 2 O 3 -SiO 2 layer, its pore volume, pore distribution and H 2 S adsorption capacity can be adjusted, the contribution of mass loading effect and the elastic loading effect toward the frequency response of the sensor can be controlled, and the sensing performance of the sensor can be optimized. The optimized sensing response is -4.4 kHz toward 100 ppm H 2 S, with a good selectivity and reproducibility operated at room temperature (25 ℃).",

keywords = "SAW sensor, H2S, Fe2O3-SiO2, Mass loading, Elastic loading",

author = "Junsen Wang and Jian Che and Changcang Qiao and Ben Niu and Wenting Zhang and Yucheng Han and Yongqing Fu and Yongliang Tang",

note = "Funding information: This work was supported by the National Natural Science Foundation of China (11805158, 61178018), and the Engineering Physics and Science Research Council of UK (EPSRC EP/P018998/1).",

year = "2022",

month = apr,

day = "11",

doi = "10.2139/ssrn.4080801",

language = "English",

journal = "SSRN Electronic Journal",

issn = "1556-5068",

}

TY - JOUR

T1 - Highly porous Fe2O3-SiO2 layer for acoustic wave based H2S sensing

T2 - mass loading or elastic loading effects?

AU - Wang, Junsen

AU - Che, Jian

AU - Qiao, Changcang

AU - Niu, Ben

AU - Zhang, Wenting

AU - Han, Yucheng

AU - Fu, Yongqing

AU - Tang, Yongliang

N1 - Funding information: This work was supported by the National Natural Science Foundation of China (11805158, 61178018), and the Engineering Physics and Science Research Council of UK (EPSRC EP/P018998/1).

PY - 2022/4/11

Y1 - 2022/4/11

N2 - A highly porous Fe 2 O 3 -SiO 2 layer prepared using sol-gel and spin-coating methods was applied on the surface of a surface acoustic wave (SAW) device for H 2 S sensing. SiO 2 in this sensing layer serves as a porous support for dispersing Fe 2 O 3 nanoparticles, and Fe 2 O 3 nanoparticles can effectively adsorb and react with H 2 S molecules. By changing the Fe/Si molar ratio in this Fe 2 O 3 -SiO 2 layer, its pore volume, pore distribution and H 2 S adsorption capacity can be adjusted, the contribution of mass loading effect and the elastic loading effect toward the frequency response of the sensor can be controlled, and the sensing performance of the sensor can be optimized. The optimized sensing response is -4.4 kHz toward 100 ppm H 2 S, with a good selectivity and reproducibility operated at room temperature (25 ℃).

AB - A highly porous Fe 2 O 3 -SiO 2 layer prepared using sol-gel and spin-coating methods was applied on the surface of a surface acoustic wave (SAW) device for H 2 S sensing. SiO 2 in this sensing layer serves as a porous support for dispersing Fe 2 O 3 nanoparticles, and Fe 2 O 3 nanoparticles can effectively adsorb and react with H 2 S molecules. By changing the Fe/Si molar ratio in this Fe 2 O 3 -SiO 2 layer, its pore volume, pore distribution and H 2 S adsorption capacity can be adjusted, the contribution of mass loading effect and the elastic loading effect toward the frequency response of the sensor can be controlled, and the sensing performance of the sensor can be optimized. The optimized sensing response is -4.4 kHz toward 100 ppm H 2 S, with a good selectivity and reproducibility operated at room temperature (25 ℃).

KW - SAW sensor

KW - H2S

KW - Fe2O3-SiO2

KW - Mass loading

KW - Elastic loading

U2 - 10.2139/ssrn.4080801

DO - 10.2139/ssrn.4080801

M3 - Article

SN - 1556-5068

JO - SSRN Electronic Journal

JF - SSRN Electronic Journal

ER -

Highly porous Fe2O3-SiO2 layer for acoustic wave based H2S sensing: mass loading or elastic loading effects?

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Keywords

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