Polythiophene-WO3 hybrid architectures for low-temperature H2S detection

Shouli Bai; Kewei Zhang; Jianhua Sun; Dongfeng Zhang; Ruixian Luo; Dianqing Li; Chungchiun Liu

doi:10.1016/j.snb.2014.02.038

Polythiophene-WO₃ hybrid architectures for low-temperature H₂S detection

Shouli Bai, Kewei Zhang, Jianhua Sun, Dongfeng Zhang, Ruixian Luo, Dianqing Li, Chungchiun Liu

Graduate Institute of Materials Science and Engineering

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

124 Scopus citations

Abstract

This paper describes the low-temperature detection of hydrogen sulphide (H₂S) using sensors based on organic-inorganic hybrids. Nanosheet-assembled WO₃ architectures were prepared by a facile hydrothermal strategy using citric acid as capping agent. The resultant WO ₃ was further modified with polythiophene through in-situ polymerization of the adsorbed thiophene monomers on the surface of WO ₃ framework. The morphology, structure and thermal stability of obtained polythiophene-WO₃ (PT-WO) hybrids were investigated in detail by FESEM, XRD, FT-IR, XPS and TG analysis. It is proved that there is a strong bonding interaction between PT and WO₃ due to the electron transfer from S to W. Gas-sensing tests show that the PT-WO hybrids exhibit high response, good selectivity and fast recovery to ppm-level H₂S at low operating temperature of 70 C. The improvement of gas-sensing performance is attributed to the formation of p-n junction at the interface between organic PT and inorganic WO₃.

Original language	English
Pages (from-to)	142-148
Number of pages	7
Journal	Sensors and Actuators, B: Chemical
Volume	197
DOIs	https://doi.org/10.1016/j.snb.2014.02.038
State	Published - 5 Jul 2014

Keywords

Polythiophene
p-n junction

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10.1016/j.snb.2014.02.038

Cite this

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title = "Polythiophene-WO3 hybrid architectures for low-temperature H2S detection",

abstract = "This paper describes the low-temperature detection of hydrogen sulphide (H2S) using sensors based on organic-inorganic hybrids. Nanosheet-assembled WO3 architectures were prepared by a facile hydrothermal strategy using citric acid as capping agent. The resultant WO 3 was further modified with polythiophene through in-situ polymerization of the adsorbed thiophene monomers on the surface of WO 3 framework. The morphology, structure and thermal stability of obtained polythiophene-WO3 (PT-WO) hybrids were investigated in detail by FESEM, XRD, FT-IR, XPS and TG analysis. It is proved that there is a strong bonding interaction between PT and WO3 due to the electron transfer from S to W. Gas-sensing tests show that the PT-WO hybrids exhibit high response, good selectivity and fast recovery to ppm-level H2S at low operating temperature of 70 C. The improvement of gas-sensing performance is attributed to the formation of p-n junction at the interface between organic PT and inorganic WO3.",

keywords = "Polythiophene, p-n junction",

author = "Shouli Bai and Kewei Zhang and Jianhua Sun and Dongfeng Zhang and Ruixian Luo and Dianqing Li and Chungchiun Liu",

note = "Funding Information: This work was supported by the National Natural Science Foundation of China (Grant Nos. 51372013 and 21177007), Beijing Natural Science Foundation (Grant No. 8112022) and Beijing Laboratory of Environmentally Harmful Chemicals Analysis. ",

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T1 - Polythiophene-WO3 hybrid architectures for low-temperature H2S detection

AU - Bai, Shouli

AU - Zhang, Kewei

AU - Sun, Jianhua

AU - Zhang, Dongfeng

AU - Luo, Ruixian

AU - Li, Dianqing

AU - Liu, Chungchiun

N1 - Funding Information: This work was supported by the National Natural Science Foundation of China (Grant Nos. 51372013 and 21177007), Beijing Natural Science Foundation (Grant No. 8112022) and Beijing Laboratory of Environmentally Harmful Chemicals Analysis.

PY - 2014/7/5

Y1 - 2014/7/5

N2 - This paper describes the low-temperature detection of hydrogen sulphide (H2S) using sensors based on organic-inorganic hybrids. Nanosheet-assembled WO3 architectures were prepared by a facile hydrothermal strategy using citric acid as capping agent. The resultant WO 3 was further modified with polythiophene through in-situ polymerization of the adsorbed thiophene monomers on the surface of WO 3 framework. The morphology, structure and thermal stability of obtained polythiophene-WO3 (PT-WO) hybrids were investigated in detail by FESEM, XRD, FT-IR, XPS and TG analysis. It is proved that there is a strong bonding interaction between PT and WO3 due to the electron transfer from S to W. Gas-sensing tests show that the PT-WO hybrids exhibit high response, good selectivity and fast recovery to ppm-level H2S at low operating temperature of 70 C. The improvement of gas-sensing performance is attributed to the formation of p-n junction at the interface between organic PT and inorganic WO3.

AB - This paper describes the low-temperature detection of hydrogen sulphide (H2S) using sensors based on organic-inorganic hybrids. Nanosheet-assembled WO3 architectures were prepared by a facile hydrothermal strategy using citric acid as capping agent. The resultant WO 3 was further modified with polythiophene through in-situ polymerization of the adsorbed thiophene monomers on the surface of WO 3 framework. The morphology, structure and thermal stability of obtained polythiophene-WO3 (PT-WO) hybrids were investigated in detail by FESEM, XRD, FT-IR, XPS and TG analysis. It is proved that there is a strong bonding interaction between PT and WO3 due to the electron transfer from S to W. Gas-sensing tests show that the PT-WO hybrids exhibit high response, good selectivity and fast recovery to ppm-level H2S at low operating temperature of 70 C. The improvement of gas-sensing performance is attributed to the formation of p-n junction at the interface between organic PT and inorganic WO3.

KW - Polythiophene

KW - p-n junction

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