Direct-current and alternating-current analysis of the humidity-sensing properties of nickel oxide doped polypyrrole encapsulated in mesoporous silica SBA-15

Rui Wang

State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, Changchun 130012, China

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Tong Zhang,

Corresponding Author

Tong Zhang

[email protected]

State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, Changchun 130012, China

State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, Changchun 130012, China===Search for more papers by this author

Yuan He,

Yuan He

State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, Changchun 130012, China

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Xiaotian Li,

Xiaotian Li

College of Material Science and Engineering, Jilin University, Changchun 130012, China

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Wangchang Geng,

Wangchang Geng

College of Material Science and Engineering, Jilin University, Changchun 130012, China

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Jinchun Tu,

Jinchun Tu

College of Material Science and Engineering, Jilin University, Changchun 130012, China

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Qing Yuan,

Qing Yuan

College of Material Science and Engineering, Jilin University, Changchun 130012, China

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Rui Wang,

Rui Wang

State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, Changchun 130012, China

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Tong Zhang,

Corresponding Author

Tong Zhang

[email protected]

State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, Changchun 130012, China

State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, Changchun 130012, China===Search for more papers by this author

Yuan He,

Yuan He

State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, Changchun 130012, China

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Xiaotian Li,

Xiaotian Li

College of Material Science and Engineering, Jilin University, Changchun 130012, China

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Wangchang Geng,

Wangchang Geng

College of Material Science and Engineering, Jilin University, Changchun 130012, China

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Jinchun Tu,

Jinchun Tu

College of Material Science and Engineering, Jilin University, Changchun 130012, China

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Qing Yuan,

Qing Yuan

College of Material Science and Engineering, Jilin University, Changchun 130012, China

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First published: 04 November 2009

https://doi.org/10.1002/app.31408

Citations: 30

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Abstract

Nickel oxide (NiO) doped polypyrrole (PPy) was encapsulated in mesoporous SBA-15. All of the synthesized samples were characterized by infrared spectroscopy, X-ray diffraction, and scanning electron microscopy. They were investigated as humidity-sensor materials at room temperature. The sensor showed excellent humidity sensitivity in the relative humidity range 11–95%. The humidity-sensing properties were very much improved by encapsulation of the NiO-doped PPy into mesoporous silica SBA-15. Finally, the sensitivity mechanism was investigated by direct-current (dc) and alternating-current (ac) analysis. The dc circuit with the instantaneous polarity reversion method was designed by us to study the dc response in different humidity environments. The conductive mechanism was established through the dc and ac investigation, and the conductive particles were identified as ions and electrons. © 2009 Wiley Periodicals, Inc. J Appl Polym Sci, 2010

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Volume115, Issue6

15 March 2010

Pages 3474-3480

Direct-current and alternating-current analysis of the humidity-sensing properties of nickel oxide doped polypyrrole encapsulated in mesoporous silica SBA-15

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Direct-current and alternating-current analysis of the humidity-sensing properties of nickel oxide doped polypyrrole encapsulated in mesoporous silica SBA-15

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