Molybdenum trioxide nanopaper as a dual gas sensor for detecting trimethylamine and hydrogen sulfide

Hua Yao Li; Liang Huang; Xiao Xue Wang; Chul Soon Lee; Ji Wook Yoon; Jun Zhou; Xin Guo; Jong Heun Lee

doi:10.1039/C6RA26280E

Molybdenum trioxide nanopaper as a dual gas sensor for detecting trimethylamine and hydrogen sulfide

Hua Yao Li, Liang Huang, Xiao Xue Wang, Chul Soon Lee, Ji Wook Yoon, Jun Zhou, Xin Guo, Jong Heun Lee

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

44 Citations (Scopus)

Abstract

A free-standing, flexible, and semi-transparent MoO₃ nanopaper was fabricated using ultralong MoO₃ nanobelts (length ∼ 200 μm; width 200-400 nm), and its gas-sensing characteristics were investigated. The sensor exhibited high responses (resistance ratio) of 49 to 5 parts per million (ppm) hydrogen sulfide (H₂S) at 250 °C and 121 to 5 ppm trimethylamine (TMA) at 325 °C with excellent gas selectivity, demonstrating its dual function for gas detection. Moreover, the sensor showed promising potential for the all-in-one detection of three representative offensive odors (TMA, H₂S, and NH₃) simply by tuning of the sensing temperature. This particular performance is attributed to the high chemical affinity of MoO₃ to H₂S and the acid-base interaction between basic TMA/NH₃ and acidic MoO₃. The mechanism underlying the control of gas selectivity by modulating the sensor temperature was investigated by Diffuse Reflectance Infrared Fourier Transform (DRIFT) measurements.

Original language	English
Pages (from-to)	3680-3685
Number of pages	6
Journal	RSC Advances
Volume	7
Issue number	7
DOIs	https://doi.org/10.1039/C6RA26280E
Publication status	Published - 2017

ASJC Scopus subject areas

Chemistry(all)
Chemical Engineering(all)

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title = "Molybdenum trioxide nanopaper as a dual gas sensor for detecting trimethylamine and hydrogen sulfide",

abstract = "A free-standing, flexible, and semi-transparent MoO3 nanopaper was fabricated using ultralong MoO3 nanobelts (length ∼ 200 μm; width 200-400 nm), and its gas-sensing characteristics were investigated. The sensor exhibited high responses (resistance ratio) of 49 to 5 parts per million (ppm) hydrogen sulfide (H2S) at 250 °C and 121 to 5 ppm trimethylamine (TMA) at 325 °C with excellent gas selectivity, demonstrating its dual function for gas detection. Moreover, the sensor showed promising potential for the all-in-one detection of three representative offensive odors (TMA, H2S, and NH3) simply by tuning of the sensing temperature. This particular performance is attributed to the high chemical affinity of MoO3 to H2S and the acid-base interaction between basic TMA/NH3 and acidic MoO3. The mechanism underlying the control of gas selectivity by modulating the sensor temperature was investigated by Diffuse Reflectance Infrared Fourier Transform (DRIFT) measurements.",

author = "Li, {Hua Yao} and Liang Huang and Wang, {Xiao Xue} and Lee, {Chul Soon} and Yoon, {Ji Wook} and Jun Zhou and Xin Guo and Lee, {Jong Heun}",

year = "2017",

doi = "10.1039/C6RA26280E",

language = "English",

volume = "7",

pages = "3680--3685",

journal = "RSC Advances",

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T1 - Molybdenum trioxide nanopaper as a dual gas sensor for detecting trimethylamine and hydrogen sulfide

AU - Li, Hua Yao

AU - Huang, Liang

AU - Wang, Xiao Xue

AU - Lee, Chul Soon

AU - Yoon, Ji Wook

AU - Zhou, Jun

AU - Guo, Xin

AU - Lee, Jong Heun

PY - 2017

Y1 - 2017

N2 - A free-standing, flexible, and semi-transparent MoO3 nanopaper was fabricated using ultralong MoO3 nanobelts (length ∼ 200 μm; width 200-400 nm), and its gas-sensing characteristics were investigated. The sensor exhibited high responses (resistance ratio) of 49 to 5 parts per million (ppm) hydrogen sulfide (H2S) at 250 °C and 121 to 5 ppm trimethylamine (TMA) at 325 °C with excellent gas selectivity, demonstrating its dual function for gas detection. Moreover, the sensor showed promising potential for the all-in-one detection of three representative offensive odors (TMA, H2S, and NH3) simply by tuning of the sensing temperature. This particular performance is attributed to the high chemical affinity of MoO3 to H2S and the acid-base interaction between basic TMA/NH3 and acidic MoO3. The mechanism underlying the control of gas selectivity by modulating the sensor temperature was investigated by Diffuse Reflectance Infrared Fourier Transform (DRIFT) measurements.

AB - A free-standing, flexible, and semi-transparent MoO3 nanopaper was fabricated using ultralong MoO3 nanobelts (length ∼ 200 μm; width 200-400 nm), and its gas-sensing characteristics were investigated. The sensor exhibited high responses (resistance ratio) of 49 to 5 parts per million (ppm) hydrogen sulfide (H2S) at 250 °C and 121 to 5 ppm trimethylamine (TMA) at 325 °C with excellent gas selectivity, demonstrating its dual function for gas detection. Moreover, the sensor showed promising potential for the all-in-one detection of three representative offensive odors (TMA, H2S, and NH3) simply by tuning of the sensing temperature. This particular performance is attributed to the high chemical affinity of MoO3 to H2S and the acid-base interaction between basic TMA/NH3 and acidic MoO3. The mechanism underlying the control of gas selectivity by modulating the sensor temperature was investigated by Diffuse Reflectance Infrared Fourier Transform (DRIFT) measurements.

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Molybdenum trioxide nanopaper as a dual gas sensor for detecting trimethylamine and hydrogen sulfide

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