Ti3C2 MXene based materials for the controlled release and the detection of volatile organic compounds
The emergence of MXene, a group of two-dimensional materials, has shown its potential to be used in diverse fields especially in energy storage since 2011. Being inspired by the intriguing properties of MXene used for energy storage, such as the high electrical conductivity and the ability to accomm...
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| Format: | Thesis-Doctor of Philosophy |
| Language: | English |
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Nanyang Technological University
2021
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| Online Access: | https://hdl.handle.net/10356/151720 |
| _version_ | 1811682393843564544 |
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| author | Ciou, Jing-Hao |
| author2 | Lee Pooi See |
| author_facet | Lee Pooi See Ciou, Jing-Hao |
| author_sort | Ciou, Jing-Hao |
| collection | NTU |
| description | The emergence of MXene, a group of two-dimensional materials, has shown its potential to be used in diverse fields especially in energy storage since 2011. Being inspired by the intriguing properties of MXene used for energy storage, such as the high electrical conductivity and the ability to accommodate ions in the interlayer space with controllable manner, the possibility to accommodate the volatile organic compounds (VOCs) in the interlayer space and to release the entrapped VOCs with controllable approaches have drawn our attention for the potential application on the controlled release of odors. Additionally, due to the abundant termination groups on the surface of MXene, it could also be the promising candidate for the detection of VOCs. The surface functional groups on MXene could not only serve as the active sites for the interaction between MXene and VOC molecules but also provide the potential anchoring points for the surface functionalization, endowing diverse surface properties by the additional termination groups.
In this thesis, Ti3C2 MXene is selected to be the main material for the studies of VOC controlled release and detection due to its superior electrical conductivity, versatile surface functional groups and better thermal stability among the MXene materials. With the polar functional group on the pristine Ti3C2 MXene surface, Ti3C2 MXene is first applied to perform the controlled release of polar aroma VOC. The surface of the Ti3C2 MXene is also functionalized with non-polar groups to improve the adsorption of the non-polar VOCs. With the improved adsorption of non-polar VOCs by surface functionalized Ti3C2 MXene, the modified MXene is further applied for the detection of the non-polar VOC.
The controlled release of the aroma VOC is monitored by the ex-situ and in-situ X-ray diffraction, which show the significant change of the interlayer distance during the adsorption and desorption of the VOCs. The adsorption mechanism is also proved by the X-ray photoelectron microscopy. The modified Ti3C2 MXene also shows the improve sensing specificity towards the non-polar VOC. These findings offer the insight of Ti3C2 MXene as a potential material used for the controlled release of aroma VOCs and the detection of VOCs. |
| first_indexed | 2024-10-01T03:56:08Z |
| format | Thesis-Doctor of Philosophy |
| id | ntu-10356/151720 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T03:56:08Z |
| publishDate | 2021 |
| publisher | Nanyang Technological University |
| record_format | dspace |
| spelling | ntu-10356/1517202023-03-04T16:43:22Z Ti3C2 MXene based materials for the controlled release and the detection of volatile organic compounds Ciou, Jing-Hao Lee Pooi See School of Materials Science and Engineering PSLee@ntu.edu.sg Engineering::Materials The emergence of MXene, a group of two-dimensional materials, has shown its potential to be used in diverse fields especially in energy storage since 2011. Being inspired by the intriguing properties of MXene used for energy storage, such as the high electrical conductivity and the ability to accommodate ions in the interlayer space with controllable manner, the possibility to accommodate the volatile organic compounds (VOCs) in the interlayer space and to release the entrapped VOCs with controllable approaches have drawn our attention for the potential application on the controlled release of odors. Additionally, due to the abundant termination groups on the surface of MXene, it could also be the promising candidate for the detection of VOCs. The surface functional groups on MXene could not only serve as the active sites for the interaction between MXene and VOC molecules but also provide the potential anchoring points for the surface functionalization, endowing diverse surface properties by the additional termination groups. In this thesis, Ti3C2 MXene is selected to be the main material for the studies of VOC controlled release and detection due to its superior electrical conductivity, versatile surface functional groups and better thermal stability among the MXene materials. With the polar functional group on the pristine Ti3C2 MXene surface, Ti3C2 MXene is first applied to perform the controlled release of polar aroma VOC. The surface of the Ti3C2 MXene is also functionalized with non-polar groups to improve the adsorption of the non-polar VOCs. With the improved adsorption of non-polar VOCs by surface functionalized Ti3C2 MXene, the modified MXene is further applied for the detection of the non-polar VOC. The controlled release of the aroma VOC is monitored by the ex-situ and in-situ X-ray diffraction, which show the significant change of the interlayer distance during the adsorption and desorption of the VOCs. The adsorption mechanism is also proved by the X-ray photoelectron microscopy. The modified Ti3C2 MXene also shows the improve sensing specificity towards the non-polar VOC. These findings offer the insight of Ti3C2 MXene as a potential material used for the controlled release of aroma VOCs and the detection of VOCs. Doctor of Philosophy 2021-06-28T07:49:59Z 2021-06-28T07:49:59Z 2021 Thesis-Doctor of Philosophy Ciou, J. (2021). Ti3C2 MXene based materials for the controlled release and the detection of volatile organic compounds. Doctoral thesis, Nanyang Technological University, Singapore. https://hdl.handle.net/10356/151720 https://hdl.handle.net/10356/151720 10.32657/10356/151720 en This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License (CC BY-NC 4.0). application/pdf Nanyang Technological University |
| spellingShingle | Engineering::Materials Ciou, Jing-Hao Ti3C2 MXene based materials for the controlled release and the detection of volatile organic compounds |
| title | Ti3C2 MXene based materials for the controlled release and the detection of volatile organic compounds |
| title_full | Ti3C2 MXene based materials for the controlled release and the detection of volatile organic compounds |
| title_fullStr | Ti3C2 MXene based materials for the controlled release and the detection of volatile organic compounds |
| title_full_unstemmed | Ti3C2 MXene based materials for the controlled release and the detection of volatile organic compounds |
| title_short | Ti3C2 MXene based materials for the controlled release and the detection of volatile organic compounds |
| title_sort | ti3c2 mxene based materials for the controlled release and the detection of volatile organic compounds |
| topic | Engineering::Materials |
| url | https://hdl.handle.net/10356/151720 |
| work_keys_str_mv | AT cioujinghao ti3c2mxenebasedmaterialsforthecontrolledreleaseandthedetectionofvolatileorganiccompounds |