A Room Temperature Trimethylamine Gas Sensor Based on Electrospinned Molybdenum Oxide Nanofibers/Ti<sub>3</sub>C<sub>2</sub>T<sub>x</sub> MXene Heterojunction
The combination of two-dimensional material MXene and one-dimensional metal oxide semiconductor can improve the carrier transmission rate, which can effectively improve sensing performance. We prepared a trimethylamine gas sensor based on MoO<sub>3</sub> nanofibers and layered Ti<sub&...
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MDPI AG
2024-03-01
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| Series: | Nanomaterials |
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| Online Access: | https://www.mdpi.com/2079-4991/14/6/537 |
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| author | Shiteng Ma Jingyu Guo Hao Zhang Xingyan Shao Dongzhi Zhang |
| author_facet | Shiteng Ma Jingyu Guo Hao Zhang Xingyan Shao Dongzhi Zhang |
| author_sort | Shiteng Ma |
| collection | DOAJ |
| description | The combination of two-dimensional material MXene and one-dimensional metal oxide semiconductor can improve the carrier transmission rate, which can effectively improve sensing performance. We prepared a trimethylamine gas sensor based on MoO<sub>3</sub> nanofibers and layered Ti<sub>3</sub>C<sub>2</sub>T<sub>x</sub> MXene. Using electrospinning and chemical etching methods, one-dimensional MoO<sub>3</sub> nanofibers and two-dimensional Ti<sub>3</sub>C<sub>2</sub>T<sub>x</sub> MXene nanosheets were prepared, respectively, and the composites were characterized via XPS, SEM, and TEM. The Ti<sub>3</sub>C<sub>2</sub>T<sub>x</sub> MXene–MoO<sub>3</sub> composite material exhibits excellent room-temperature response characteristics to trimethylamine gas, showing high response (up to four for 2 ppm trimethylamine gas) and rapid response–recovery time (10 s/7 s). Further, we have studied the possible sensitivity mechanism of the sensor. The Ti<sub>3</sub>C<sub>2</sub>T<sub>x</sub> MXene–MoO<sub>3</sub> composite material has a larger specific surface area and more abundant active sites, combined with p–n heterojunction, which effectively improves the sensitivity of the sensor. Because of its low detection limit and high stability, it has the potential to be applied in the detection system of trimethylamine as a biomarker in exhaled air. |
| first_indexed | 2024-04-24T17:57:21Z |
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| issn | 2079-4991 |
| language | English |
| last_indexed | 2024-04-24T17:57:21Z |
| publishDate | 2024-03-01 |
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| spelling | doaj.art-892d26ff12124af2b62b1af1b87928ca2024-03-27T13:57:37ZengMDPI AGNanomaterials2079-49912024-03-0114653710.3390/nano14060537A Room Temperature Trimethylamine Gas Sensor Based on Electrospinned Molybdenum Oxide Nanofibers/Ti<sub>3</sub>C<sub>2</sub>T<sub>x</sub> MXene HeterojunctionShiteng Ma0Jingyu Guo1Hao Zhang2Xingyan Shao3Dongzhi Zhang4College of Control Science and Engineering, China University of Petroleum (East China), Qingdao 266580, ChinaCollege of Control Science and Engineering, China University of Petroleum (East China), Qingdao 266580, ChinaCollege of Control Science and Engineering, China University of Petroleum (East China), Qingdao 266580, ChinaCollege of Control Science and Engineering, China University of Petroleum (East China), Qingdao 266580, ChinaCollege of Control Science and Engineering, China University of Petroleum (East China), Qingdao 266580, ChinaThe combination of two-dimensional material MXene and one-dimensional metal oxide semiconductor can improve the carrier transmission rate, which can effectively improve sensing performance. We prepared a trimethylamine gas sensor based on MoO<sub>3</sub> nanofibers and layered Ti<sub>3</sub>C<sub>2</sub>T<sub>x</sub> MXene. Using electrospinning and chemical etching methods, one-dimensional MoO<sub>3</sub> nanofibers and two-dimensional Ti<sub>3</sub>C<sub>2</sub>T<sub>x</sub> MXene nanosheets were prepared, respectively, and the composites were characterized via XPS, SEM, and TEM. The Ti<sub>3</sub>C<sub>2</sub>T<sub>x</sub> MXene–MoO<sub>3</sub> composite material exhibits excellent room-temperature response characteristics to trimethylamine gas, showing high response (up to four for 2 ppm trimethylamine gas) and rapid response–recovery time (10 s/7 s). Further, we have studied the possible sensitivity mechanism of the sensor. The Ti<sub>3</sub>C<sub>2</sub>T<sub>x</sub> MXene–MoO<sub>3</sub> composite material has a larger specific surface area and more abundant active sites, combined with p–n heterojunction, which effectively improves the sensitivity of the sensor. Because of its low detection limit and high stability, it has the potential to be applied in the detection system of trimethylamine as a biomarker in exhaled air.https://www.mdpi.com/2079-4991/14/6/537electrospinningMoO<sub>3</sub> nanofibersTi<sub>3</sub>C<sub>2</sub>T<sub>x</sub> MXenetrimethylamine sensorp-n heterojunction |
| spellingShingle | Shiteng Ma Jingyu Guo Hao Zhang Xingyan Shao Dongzhi Zhang A Room Temperature Trimethylamine Gas Sensor Based on Electrospinned Molybdenum Oxide Nanofibers/Ti<sub>3</sub>C<sub>2</sub>T<sub>x</sub> MXene Heterojunction Nanomaterials electrospinning MoO<sub>3</sub> nanofibers Ti<sub>3</sub>C<sub>2</sub>T<sub>x</sub> MXene trimethylamine sensor p-n heterojunction |
| title | A Room Temperature Trimethylamine Gas Sensor Based on Electrospinned Molybdenum Oxide Nanofibers/Ti<sub>3</sub>C<sub>2</sub>T<sub>x</sub> MXene Heterojunction |
| title_full | A Room Temperature Trimethylamine Gas Sensor Based on Electrospinned Molybdenum Oxide Nanofibers/Ti<sub>3</sub>C<sub>2</sub>T<sub>x</sub> MXene Heterojunction |
| title_fullStr | A Room Temperature Trimethylamine Gas Sensor Based on Electrospinned Molybdenum Oxide Nanofibers/Ti<sub>3</sub>C<sub>2</sub>T<sub>x</sub> MXene Heterojunction |
| title_full_unstemmed | A Room Temperature Trimethylamine Gas Sensor Based on Electrospinned Molybdenum Oxide Nanofibers/Ti<sub>3</sub>C<sub>2</sub>T<sub>x</sub> MXene Heterojunction |
| title_short | A Room Temperature Trimethylamine Gas Sensor Based on Electrospinned Molybdenum Oxide Nanofibers/Ti<sub>3</sub>C<sub>2</sub>T<sub>x</sub> MXene Heterojunction |
| title_sort | room temperature trimethylamine gas sensor based on electrospinned molybdenum oxide nanofibers ti sub 3 sub c sub 2 sub t sub x sub mxene heterojunction |
| topic | electrospinning MoO<sub>3</sub> nanofibers Ti<sub>3</sub>C<sub>2</sub>T<sub>x</sub> MXene trimethylamine sensor p-n heterojunction |
| url | https://www.mdpi.com/2079-4991/14/6/537 |
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