Density Functional Theory Study of B, N, and Si Doped Penta-Graphene as the Potential Gas Sensors for NH<sub>3</sub> Detection
Designing a high-performance gas sensor to efficiently detect the hazardous NH<sub>3</sub> molecule is beneficial to air monitoring and pollution control. In this work, the first-principles calculations were employed to investigate the adsorption structures, electronic characteristics, a...
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| Format: | Article |
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MDPI AG
2022-01-01
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| Series: | Membranes |
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| Online Access: | https://www.mdpi.com/2077-0375/12/1/77 |
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| author | Guangjun Chen Lei Gan Huihui Xiong Haihui Zhang |
| author_facet | Guangjun Chen Lei Gan Huihui Xiong Haihui Zhang |
| author_sort | Guangjun Chen |
| collection | DOAJ |
| description | Designing a high-performance gas sensor to efficiently detect the hazardous NH<sub>3</sub> molecule is beneficial to air monitoring and pollution control. In this work, the first-principles calculations were employed to investigate the adsorption structures, electronic characteristics, and gas sensing properties of the pristine and B-, N-, P-, Al-, and Si-doped penta-graphene (PG) toward the NH<sub>3</sub>, H<sub>2</sub>S, and SO<sub>2</sub> molecules. The results indicate that the pristine PG is insensitive to those toxic gases due to the weak adsorption strength and long adsorption distance. Nevertheless, the doping of B, N, Al, and Si (B and Al) results in the transition of NH<sub>3</sub> (H<sub>2</sub>S and SO<sub>2</sub>) adsorption from physisorption to chemisorption, which is primarily ascribed to the large charge transfer and strong orbital hybridizations between gas molecules and doping atoms. In addition, NH<sub>3</sub> adsorption leads to the remarkable variation of electrical conductivity for the B-, N-, and Si-doped PG, and the adsorption strength of NH<sub>3</sub> on the B-, N-, and Si-doped PG is larger than that of H<sub>2</sub>S and SO<sub>2</sub>. Moreover, the chemically adsorbed NH<sub>3</sub> molecule on the N-, B-, and Si-doped PG can be effectively desorbed by injecting electrons into the systems. Those results shed light on the potential application of PG-based nanosheets as reusable gas sensors for NH<sub>3</sub> detection. |
| first_indexed | 2024-03-10T00:58:56Z |
| format | Article |
| id | doaj.art-b199712312f24abaa2fe43a42c70930a |
| institution | Directory Open Access Journal |
| issn | 2077-0375 |
| language | English |
| last_indexed | 2024-03-10T00:58:56Z |
| publishDate | 2022-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Membranes |
| spelling | doaj.art-b199712312f24abaa2fe43a42c70930a2023-11-23T14:38:59ZengMDPI AGMembranes2077-03752022-01-011217710.3390/membranes12010077Density Functional Theory Study of B, N, and Si Doped Penta-Graphene as the Potential Gas Sensors for NH<sub>3</sub> DetectionGuangjun Chen0Lei Gan1Huihui Xiong2Haihui Zhang3Faculty of Materials, Metallurgy and Chemistry, Jiangxi University of Science and Technology, Ganzhou 34100, ChinaFaculty of Materials, Metallurgy and Chemistry, Jiangxi University of Science and Technology, Ganzhou 34100, ChinaFaculty of Materials, Metallurgy and Chemistry, Jiangxi University of Science and Technology, Ganzhou 34100, ChinaFaculty of Materials, Metallurgy and Chemistry, Jiangxi University of Science and Technology, Ganzhou 34100, ChinaDesigning a high-performance gas sensor to efficiently detect the hazardous NH<sub>3</sub> molecule is beneficial to air monitoring and pollution control. In this work, the first-principles calculations were employed to investigate the adsorption structures, electronic characteristics, and gas sensing properties of the pristine and B-, N-, P-, Al-, and Si-doped penta-graphene (PG) toward the NH<sub>3</sub>, H<sub>2</sub>S, and SO<sub>2</sub> molecules. The results indicate that the pristine PG is insensitive to those toxic gases due to the weak adsorption strength and long adsorption distance. Nevertheless, the doping of B, N, Al, and Si (B and Al) results in the transition of NH<sub>3</sub> (H<sub>2</sub>S and SO<sub>2</sub>) adsorption from physisorption to chemisorption, which is primarily ascribed to the large charge transfer and strong orbital hybridizations between gas molecules and doping atoms. In addition, NH<sub>3</sub> adsorption leads to the remarkable variation of electrical conductivity for the B-, N-, and Si-doped PG, and the adsorption strength of NH<sub>3</sub> on the B-, N-, and Si-doped PG is larger than that of H<sub>2</sub>S and SO<sub>2</sub>. Moreover, the chemically adsorbed NH<sub>3</sub> molecule on the N-, B-, and Si-doped PG can be effectively desorbed by injecting electrons into the systems. Those results shed light on the potential application of PG-based nanosheets as reusable gas sensors for NH<sub>3</sub> detection.https://www.mdpi.com/2077-0375/12/1/77doped penta-grapheneadsorptionfirst-principles calculationgas sensor |
| spellingShingle | Guangjun Chen Lei Gan Huihui Xiong Haihui Zhang Density Functional Theory Study of B, N, and Si Doped Penta-Graphene as the Potential Gas Sensors for NH<sub>3</sub> Detection Membranes doped penta-graphene adsorption first-principles calculation gas sensor |
| title | Density Functional Theory Study of B, N, and Si Doped Penta-Graphene as the Potential Gas Sensors for NH<sub>3</sub> Detection |
| title_full | Density Functional Theory Study of B, N, and Si Doped Penta-Graphene as the Potential Gas Sensors for NH<sub>3</sub> Detection |
| title_fullStr | Density Functional Theory Study of B, N, and Si Doped Penta-Graphene as the Potential Gas Sensors for NH<sub>3</sub> Detection |
| title_full_unstemmed | Density Functional Theory Study of B, N, and Si Doped Penta-Graphene as the Potential Gas Sensors for NH<sub>3</sub> Detection |
| title_short | Density Functional Theory Study of B, N, and Si Doped Penta-Graphene as the Potential Gas Sensors for NH<sub>3</sub> Detection |
| title_sort | density functional theory study of b n and si doped penta graphene as the potential gas sensors for nh sub 3 sub detection |
| topic | doped penta-graphene adsorption first-principles calculation gas sensor |
| url | https://www.mdpi.com/2077-0375/12/1/77 |
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