Innovative development on a p-type delafossite CuCrO₂ nanoparticles based triethylamine sensor
Metal oxide semiconductors are recognized as an excellent underlying substance for the assembly of gas sensors to detect the volatile organic compounds in industry or healthcare, but are constrained by their low selectivity and high operation temperature. In the present paper, we present a nanostruc...
| Main Authors: | , , , , , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2022
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/160980 |
| _version_ | 1811676815331164160 |
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| author | Liu, Hai Cao, Xun Wu, Hao Li, Bolong Li, Yi Zhu, Wenhuan Yang, Zhi Huang, Yizhong |
| author2 | School of Materials Science and Engineering |
| author_facet | School of Materials Science and Engineering Liu, Hai Cao, Xun Wu, Hao Li, Bolong Li, Yi Zhu, Wenhuan Yang, Zhi Huang, Yizhong |
| author_sort | Liu, Hai |
| collection | NTU |
| description | Metal oxide semiconductors are recognized as an excellent underlying substance for the assembly of gas sensors to detect the volatile organic compounds in industry or healthcare, but are constrained by their low selectivity and high operation temperature. In the present paper, we present a nanostructured p-type delafossite CuCrO2, synthesized by the hydrothermal method, that provides a high selectivity, stability and high dynamic response to triethylamine at a low temperature of 140 ℃. In-situ heating spectrum analysis and systematic gas sensing tests with the assistance of first principles calculations based on the density functional theory demonstrate that this ternary oxide takes a unique synergy mechanism for gas sensing process, rather than the ionosorption effect of ambient oxygen. It starts with the adsorption of gas molecules to the unsaturated coordinative metal sites of Cr, which is then followed by the dehydrogenation on Cu resulting in the formation of oxygen vacancies. This gas sensing mechanism successfully explains the extraordinary properties of CuCrO2 nanoparticles as a triethylamine sensor. This work delivers an exploratory approach to the assigned interaction of gas molecules and the sensitive layer at atomic scale, which provides ways to design and develop more advanced gas sensors for other material systems. |
| first_indexed | 2024-10-01T02:27:28Z |
| format | Journal Article |
| id | ntu-10356/160980 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T02:27:28Z |
| publishDate | 2022 |
| record_format | dspace |
| spelling | ntu-10356/1609802022-08-10T04:20:54Z Innovative development on a p-type delafossite CuCrO₂ nanoparticles based triethylamine sensor Liu, Hai Cao, Xun Wu, Hao Li, Bolong Li, Yi Zhu, Wenhuan Yang, Zhi Huang, Yizhong School of Materials Science and Engineering Engineering::Materials Gas Sensor Metal Oxide Semiconductor Metal oxide semiconductors are recognized as an excellent underlying substance for the assembly of gas sensors to detect the volatile organic compounds in industry or healthcare, but are constrained by their low selectivity and high operation temperature. In the present paper, we present a nanostructured p-type delafossite CuCrO2, synthesized by the hydrothermal method, that provides a high selectivity, stability and high dynamic response to triethylamine at a low temperature of 140 ℃. In-situ heating spectrum analysis and systematic gas sensing tests with the assistance of first principles calculations based on the density functional theory demonstrate that this ternary oxide takes a unique synergy mechanism for gas sensing process, rather than the ionosorption effect of ambient oxygen. It starts with the adsorption of gas molecules to the unsaturated coordinative metal sites of Cr, which is then followed by the dehydrogenation on Cu resulting in the formation of oxygen vacancies. This gas sensing mechanism successfully explains the extraordinary properties of CuCrO2 nanoparticles as a triethylamine sensor. This work delivers an exploratory approach to the assigned interaction of gas molecules and the sensitive layer at atomic scale, which provides ways to design and develop more advanced gas sensors for other material systems. The authors are grateful to the National Natural Science Foundation of China 61504079, 11847053, 11904100, and the Science and Technology Commission of Shanghai Municipality Program 19DZ2281000. 2022-08-10T04:20:54Z 2022-08-10T04:20:54Z 2020 Journal Article Liu, H., Cao, X., Wu, H., Li, B., Li, Y., Zhu, W., Yang, Z. & Huang, Y. (2020). Innovative development on a p-type delafossite CuCrO₂ nanoparticles based triethylamine sensor. Sensors and Actuators, B: Chemical, 324, 128743-. https://dx.doi.org/10.1016/j.snb.2020.128743 0925-4005 https://hdl.handle.net/10356/160980 10.1016/j.snb.2020.128743 2-s2.0-85089464389 324 128743 en Sensors and Actuators, B: Chemical © 2020 Elsevier B.V. All rights reserved. |
| spellingShingle | Engineering::Materials Gas Sensor Metal Oxide Semiconductor Liu, Hai Cao, Xun Wu, Hao Li, Bolong Li, Yi Zhu, Wenhuan Yang, Zhi Huang, Yizhong Innovative development on a p-type delafossite CuCrO₂ nanoparticles based triethylamine sensor |
| title | Innovative development on a p-type delafossite CuCrO₂ nanoparticles based triethylamine sensor |
| title_full | Innovative development on a p-type delafossite CuCrO₂ nanoparticles based triethylamine sensor |
| title_fullStr | Innovative development on a p-type delafossite CuCrO₂ nanoparticles based triethylamine sensor |
| title_full_unstemmed | Innovative development on a p-type delafossite CuCrO₂ nanoparticles based triethylamine sensor |
| title_short | Innovative development on a p-type delafossite CuCrO₂ nanoparticles based triethylamine sensor |
| title_sort | innovative development on a p type delafossite cucro₂ nanoparticles based triethylamine sensor |
| topic | Engineering::Materials Gas Sensor Metal Oxide Semiconductor |
| url | https://hdl.handle.net/10356/160980 |
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