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; Yuchen Han; Yongqing Fu; Yongliang Tang

doi:10.1016/j.snb.2022.132160

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, Yuchen Han, Yongqing Fu, Yongliang Tang^*

^*Corresponding author for this work

Mathematics, Physics and Electrical Engineering

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

10 Citations (Scopus)

17 Downloads (Pure)

Abstract

A highly porous Fe2O3-SiO2 layer prepared using sol-gel and spin-coating methods was applied on the surface of a surface acoustic wave (SAW) device for H2S sensing. SiO2 in this sensing layer serves as a porous support for dispersing Fe2O3 nanoparticles, and Fe2O3 nanoparticles can effectively adsorb and react with H2S molecules. By changing the Fe/Si molar ratio in this Fe2O3-SiO2 layer, its pore volume, pore distribution and H2S 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 H2S, with a good selectivity and reproducibility operated at room temperature (25 ℃).

Original language	English
Article number	132160
Number of pages	9
Journal	Sensors and Actuators B: Chemical
Volume	367
Early online date	4 Jun 2022
DOIs	https://doi.org/10.1016/j.snb.2022.132160
Publication status	Published - 15 Sept 2022

Keywords

Elastic loading
Fe O -SiO
H S
Mass loading
SAW sensor

Access to Document

10.1016/j.snb.2022.132160

Tang Sens Acuta B final submitted manuscriptAccepted author manuscript, 1.34 MBLicence: CC BY-NC-ND

Cite this

@article{b9352272399745fc8c5310e7efb62a6b,

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

abstract = "A highly porous Fe2O3-SiO2 layer prepared using sol-gel and spin-coating methods was applied on the surface of a surface acoustic wave (SAW) device for H2S sensing. SiO2 in this sensing layer serves as a porous support for dispersing Fe2O3 nanoparticles, and Fe2O3 nanoparticles can effectively adsorb and react with H2S molecules. By changing the Fe/Si molar ratio in this Fe2O3-SiO2 layer, its pore volume, pore distribution and H2S 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 H2S, with a good selectivity and reproducibility operated at room temperature (25 ℃).",

keywords = "Elastic loading, Fe O -SiO, H S, Mass loading, SAW sensor",

author = "Junsen Wang and Jian Che and Changcang Qiao and Ben Niu and Wenting Zhang and Yuchen 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 = sep,

day = "15",

doi = "10.1016/j.snb.2022.132160",

language = "English",

volume = "367",

journal = "Sensors and Actuators B: Chemical",

issn = "0925-4005",

publisher = "Elsevier",

}

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, Yuchen

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 - 2022/9/15

Y1 - 2022/9/15

N2 - A highly porous Fe2O3-SiO2 layer prepared using sol-gel and spin-coating methods was applied on the surface of a surface acoustic wave (SAW) device for H2S sensing. SiO2 in this sensing layer serves as a porous support for dispersing Fe2O3 nanoparticles, and Fe2O3 nanoparticles can effectively adsorb and react with H2S molecules. By changing the Fe/Si molar ratio in this Fe2O3-SiO2 layer, its pore volume, pore distribution and H2S 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 H2S, with a good selectivity and reproducibility operated at room temperature (25 ℃).

AB - A highly porous Fe2O3-SiO2 layer prepared using sol-gel and spin-coating methods was applied on the surface of a surface acoustic wave (SAW) device for H2S sensing. SiO2 in this sensing layer serves as a porous support for dispersing Fe2O3 nanoparticles, and Fe2O3 nanoparticles can effectively adsorb and react with H2S molecules. By changing the Fe/Si molar ratio in this Fe2O3-SiO2 layer, its pore volume, pore distribution and H2S 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 H2S, with a good selectivity and reproducibility operated at room temperature (25 ℃).

KW - Elastic loading

KW - Fe O -SiO

KW - H S

KW - Mass loading

KW - SAW sensor

UR - http://www.scopus.com/inward/record.url?scp=85131956147&partnerID=8YFLogxK

U2 - 10.1016/j.snb.2022.132160

DO - 10.1016/j.snb.2022.132160

M3 - Article

SN - 0925-4005

VL - 367

JO - Sensors and Actuators B: Chemical

JF - Sensors and Actuators B: Chemical

M1 - 132160

ER -

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

Abstract

Keywords

Access to Document

Other files and links

Fingerprint

Cite this