Si-Cu nanocomposite as an effective sensing layer for H2S based on quartz surface acoustic wave sensors

Jian Che; Junsen Wang; Changcang Qiao; Yudong Xia; Kai Ou; Jing Zhou; Yuxiang Ni; Wenting Zhang; Yuchen Han; Xiaotao Zu; Yongqing Fu; Yongliang Tang

doi:10.1016/j.sna.2023.114225

Si-Cu nanocomposite as an effective sensing layer for H2S based on quartz surface acoustic wave sensors

Jian Che, Junsen Wang, Changcang Qiao, Yudong Xia, Kai Ou, Jing Zhou, Yuxiang Ni, Wenting Zhang, Yuchen Han, Xiaotao Zu, Yongqing Fu, Yongliang Tang^*

^*Corresponding author for this work

Mathematics, Physics and Electrical Engineering

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

Abstract

It has been a critical challenge to develop highly sensitive H2S gas sensors, due to its wide-range application in industry and frequent leakage, which endangers people's lives. In this work, a highly sensitive room-temperature SAW H2S gas sensor based on Si-Cu nanocomposite was developed. The Cu content in this composite layer plays a key role for H2S response of the sensor because CuO, an excellent adsorption site for H2S, presents on the surface of Cu. The amorphous Si content results in the highly porous structure enhancing the interaction between CuO and H2S. The interaction leads to the formation of CuS and a negative frequency response of the sensor. H2O molecules effectively participate the reactions between CuO and H2S, and the responses of H2S were significantly enhanced in a moister environment. With the relative humidity of 60%, the sensor can detect 50 ppb H2S with a response of -225 Hz.

Original language	English
Journal	Sensors and Actuators, A: Physical
Early online date	7 Feb 2023
DOIs	https://doi.org/10.1016/j.sna.2023.114225
Publication status	E-pub ahead of print - 7 Feb 2023

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Sesn Actuat A accepted paper 2023
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Licence: CC BY-NC-ND
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@article{4a7180dcca184e74bd8a2110106d7d3a,

title = "Si-Cu nanocomposite as an effective sensing layer for H2S based on quartz surface acoustic wave sensors",

abstract = "It has been a critical challenge to develop highly sensitive H2S gas sensors, due to its wide-range application in industry and frequent leakage, which endangers people's lives. In this work, a highly sensitive room-temperature SAW H2S gas sensor based on Si-Cu nanocomposite was developed. The Cu content in this composite layer plays a key role for H2S response of the sensor because CuO, an excellent adsorption site for H2S, presents on the surface of Cu. The amorphous Si content results in the highly porous structure enhancing the interaction between CuO and H2S. The interaction leads to the formation of CuS and a negative frequency response of the sensor. H2O molecules effectively participate the reactions between CuO and H2S, and the responses of H2S were significantly enhanced in a moister environment. With the relative humidity of 60%, the sensor can detect 50 ppb H2S with a response of -225 Hz.",

keywords = "surface acoustic wave, gas sensor, H2S, CuO, Si, humidity",

author = "Jian Che and Junsen Wang and Changcang Qiao and Yudong Xia and Kai Ou and Jing Zhou and Yuxiang Ni and Wenting Zhang and Yuchen Han and Xiaotao Zu and Yongqing Fu and Yongliang Tang",

note = "Funding information: This work was supported by the Natural Science Foundation of Sichuan province (2022NSFSC1981), National Natural Science Foundation of China (61178018), and the Engineering Physics and Science Research Council of UK (EP/P018998/1) and International Exchange Grant (201078) through Royal Society and NFSC.",

year = "2023",

month = feb,

day = "7",

doi = "10.1016/j.sna.2023.114225",

language = "English",

journal = "Sensors and Actuators, A: Physical",

issn = "0924-4247",

publisher = "Elsevier",

}

TY - JOUR

T1 - Si-Cu nanocomposite as an effective sensing layer for H2S based on quartz surface acoustic wave sensors

AU - Che, Jian

AU - Wang, Junsen

AU - Qiao, Changcang

AU - Xia, Yudong

AU - Ou, Kai

AU - Zhou, Jing

AU - Ni, Yuxiang

AU - Zhang, Wenting

AU - Han, Yuchen

AU - Zu, Xiaotao

AU - Fu, Yongqing

AU - Tang, Yongliang

N1 - Funding information: This work was supported by the Natural Science Foundation of Sichuan province (2022NSFSC1981), National Natural Science Foundation of China (61178018), and the Engineering Physics and Science Research Council of UK (EP/P018998/1) and International Exchange Grant (201078) through Royal Society and NFSC.

PY - 2023/2/7

Y1 - 2023/2/7

N2 - It has been a critical challenge to develop highly sensitive H2S gas sensors, due to its wide-range application in industry and frequent leakage, which endangers people's lives. In this work, a highly sensitive room-temperature SAW H2S gas sensor based on Si-Cu nanocomposite was developed. The Cu content in this composite layer plays a key role for H2S response of the sensor because CuO, an excellent adsorption site for H2S, presents on the surface of Cu. The amorphous Si content results in the highly porous structure enhancing the interaction between CuO and H2S. The interaction leads to the formation of CuS and a negative frequency response of the sensor. H2O molecules effectively participate the reactions between CuO and H2S, and the responses of H2S were significantly enhanced in a moister environment. With the relative humidity of 60%, the sensor can detect 50 ppb H2S with a response of -225 Hz.

AB - It has been a critical challenge to develop highly sensitive H2S gas sensors, due to its wide-range application in industry and frequent leakage, which endangers people's lives. In this work, a highly sensitive room-temperature SAW H2S gas sensor based on Si-Cu nanocomposite was developed. The Cu content in this composite layer plays a key role for H2S response of the sensor because CuO, an excellent adsorption site for H2S, presents on the surface of Cu. The amorphous Si content results in the highly porous structure enhancing the interaction between CuO and H2S. The interaction leads to the formation of CuS and a negative frequency response of the sensor. H2O molecules effectively participate the reactions between CuO and H2S, and the responses of H2S were significantly enhanced in a moister environment. With the relative humidity of 60%, the sensor can detect 50 ppb H2S with a response of -225 Hz.

KW - surface acoustic wave

KW - gas sensor

KW - H2S

KW - CuO

KW - Si

KW - humidity

U2 - 10.1016/j.sna.2023.114225

DO - 10.1016/j.sna.2023.114225

M3 - Article

JO - Sensors and Actuators, A: Physical

JF - Sensors and Actuators, A: Physical

SN - 0924-4247

ER -

Si-Cu nanocomposite as an effective sensing layer for H2S based on quartz surface acoustic wave sensors

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