Flexible fabric gas sensors based on PANI/WO3 p−n heterojunction for high performance NH3 detection at room temperature

Meng He; Lili Xie; Guifang Luo; Zhanhong Li; James Wright; Zhigang Zhu

doi:10.1007/s40843-020-1364-4

Flexible fabric gas sensors based on PANI/WO₃ p−n heterojunction for high performance NH₃ detection at room temperature

Meng He, Lili Xie, Guifang Luo, Zhanhong Li, James Wright, Zhigang Zhu

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

50 Citations (Scopus)

Abstract

A PANI/WO₃@cotton thread-based flexible sensor that is capable of detecting NH₃ at room temperature is developed here. A layer of WO₃ with PANI nanoparticles can be deposited by in-situ polymerization. The morphology and structure of the specimens were investigated by utilizing TEM, SEM, XRD and FTIR. The sensing performance of the PANI/WO₃@cotton sensors with different WO₃ molar ratios to NH₃ at room temperature was examined. The results show that the optimal sensor (10 mol% WO₃) has a response of 6.0 to 100 ppm NH₃, which is significantly higher than that of the sensors based on pristine PANI and other composites. The PANI/WO₃@cotton sensor also displays excellent selectivity, gas response, and flexibility even at room temperature. The unique fiber structure, p-n heterojunction, and the increased protonation of PANI in the composites contribute to the enhanced sensing property.

Original language	English
Pages (from-to)	2028-2039
Number of pages	12
Journal	Science China Materials
Volume	63
Issue number	10
DOIs	https://doi.org/10.1007/s40843-020-1364-4
Publication status	Published - 1 Oct 2020

Keywords

gas sensor
NH detection
p-n heterojunction
PANI/WO cotton thread

Access to Document

10.1007/s40843-020-1364-4

Cite this

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title = "Flexible fabric gas sensors based on PANI/WO3 p−n heterojunction for high performance NH3 detection at room temperature",

abstract = "A PANI/WO3@cotton thread-based flexible sensor that is capable of detecting NH3 at room temperature is developed here. A layer of WO3 with PANI nanoparticles can be deposited by in-situ polymerization. The morphology and structure of the specimens were investigated by utilizing TEM, SEM, XRD and FTIR. The sensing performance of the PANI/WO3@cotton sensors with different WO3 molar ratios to NH3 at room temperature was examined. The results show that the optimal sensor (10 mol% WO3) has a response of 6.0 to 100 ppm NH3, which is significantly higher than that of the sensors based on pristine PANI and other composites. The PANI/WO3@cotton sensor also displays excellent selectivity, gas response, and flexibility even at room temperature. The unique fiber structure, p-n heterojunction, and the increased protonation of PANI in the composites contribute to the enhanced sensing property.",

keywords = "gas sensor, NH detection, p-n heterojunction, PANI/WO cotton thread",

author = "Meng He and Lili Xie and Guifang Luo and Zhanhong Li and James Wright and Zhigang Zhu",

note = "Publisher Copyright: {\textcopyright} 2020, Science China Press and Springer-Verlag GmbH Germany, part of Springer Nature.",

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AU - He, Meng

AU - Xie, Lili

AU - Luo, Guifang

AU - Li, Zhanhong

AU - Wright, James

AU - Zhu, Zhigang

PY - 2020/10/1

Y1 - 2020/10/1

N2 - A PANI/WO3@cotton thread-based flexible sensor that is capable of detecting NH3 at room temperature is developed here. A layer of WO3 with PANI nanoparticles can be deposited by in-situ polymerization. The morphology and structure of the specimens were investigated by utilizing TEM, SEM, XRD and FTIR. The sensing performance of the PANI/WO3@cotton sensors with different WO3 molar ratios to NH3 at room temperature was examined. The results show that the optimal sensor (10 mol% WO3) has a response of 6.0 to 100 ppm NH3, which is significantly higher than that of the sensors based on pristine PANI and other composites. The PANI/WO3@cotton sensor also displays excellent selectivity, gas response, and flexibility even at room temperature. The unique fiber structure, p-n heterojunction, and the increased protonation of PANI in the composites contribute to the enhanced sensing property.

AB - A PANI/WO3@cotton thread-based flexible sensor that is capable of detecting NH3 at room temperature is developed here. A layer of WO3 with PANI nanoparticles can be deposited by in-situ polymerization. The morphology and structure of the specimens were investigated by utilizing TEM, SEM, XRD and FTIR. The sensing performance of the PANI/WO3@cotton sensors with different WO3 molar ratios to NH3 at room temperature was examined. The results show that the optimal sensor (10 mol% WO3) has a response of 6.0 to 100 ppm NH3, which is significantly higher than that of the sensors based on pristine PANI and other composites. The PANI/WO3@cotton sensor also displays excellent selectivity, gas response, and flexibility even at room temperature. The unique fiber structure, p-n heterojunction, and the increased protonation of PANI in the composites contribute to the enhanced sensing property.

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KW - NH detection

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