Fuel-free light-powered TiO2/Pt Janus micromotors for enhanced nitroaromatic explosives degradation
Nitroaromatic explosives such as 2,4,6-trinitrotoluene (2,4,6-TNT) and 2,4-dinitrotoluene (2,4-DNT) are two common nitroaromatic compounds in ammunition. Their leakage leads to serious environmental pollution and threatens human health. It is important to remove or decompose them rapidly and efficie...
| Principais autores: | , , , |
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| Formato: | Journal Article |
| Idioma: | English |
| Publicado em: |
2020
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| Acesso em linha: | https://hdl.handle.net/10356/141348 |
| _version_ | 1826128809790799872 |
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| author | Kong, Lei Mayorga-Martinez, Carmen C. Guan, Jianguo Pumera, Martin |
| author2 | School of Physical and Mathematical Sciences |
| author_facet | School of Physical and Mathematical Sciences Kong, Lei Mayorga-Martinez, Carmen C. Guan, Jianguo Pumera, Martin |
| author_sort | Kong, Lei |
| collection | NTU |
| description | Nitroaromatic explosives such as 2,4,6-trinitrotoluene (2,4,6-TNT) and 2,4-dinitrotoluene (2,4-DNT) are two common nitroaromatic compounds in ammunition. Their leakage leads to serious environmental pollution and threatens human health. It is important to remove or decompose them rapidly and efficiently. In this work, we present that light-powered TiO2/Pt Janus micromotors have high efficiency for the “on-the-fly” photocatalytic degradation of 2,4-DNT and 2,4,6-TNT in pure water under UV irradiation. The redox reactions, induced by photogenerated holes and electrons on the TiO2/Pt Janus micromotor surfaces, produce a local electric field that propels the micromotors as well as oxidative species that are able to photodegrade 2,4-DNT and 2,4,6-TNT. Furthermore, the moving TiO2/Pt Janus micromotors show an efficient degradation of nitroaromatic compounds as compared to the stationary ones thanks to the enhanced mixing and mass transfer in the solution by movement of these micromotors. Such fuel-free light-powered micromotors for explosive degradation are expected to find a way to environmental remediation and security applications. |
| first_indexed | 2024-10-01T07:30:57Z |
| format | Journal Article |
| id | ntu-10356/141348 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T07:30:57Z |
| publishDate | 2020 |
| record_format | dspace |
| spelling | ntu-10356/1413482020-06-08T01:56:42Z Fuel-free light-powered TiO2/Pt Janus micromotors for enhanced nitroaromatic explosives degradation Kong, Lei Mayorga-Martinez, Carmen C. Guan, Jianguo Pumera, Martin School of Physical and Mathematical Sciences Science::Chemistry Micromachines Microrobots Nitroaromatic explosives such as 2,4,6-trinitrotoluene (2,4,6-TNT) and 2,4-dinitrotoluene (2,4-DNT) are two common nitroaromatic compounds in ammunition. Their leakage leads to serious environmental pollution and threatens human health. It is important to remove or decompose them rapidly and efficiently. In this work, we present that light-powered TiO2/Pt Janus micromotors have high efficiency for the “on-the-fly” photocatalytic degradation of 2,4-DNT and 2,4,6-TNT in pure water under UV irradiation. The redox reactions, induced by photogenerated holes and electrons on the TiO2/Pt Janus micromotor surfaces, produce a local electric field that propels the micromotors as well as oxidative species that are able to photodegrade 2,4-DNT and 2,4,6-TNT. Furthermore, the moving TiO2/Pt Janus micromotors show an efficient degradation of nitroaromatic compounds as compared to the stationary ones thanks to the enhanced mixing and mass transfer in the solution by movement of these micromotors. Such fuel-free light-powered micromotors for explosive degradation are expected to find a way to environmental remediation and security applications. ASTAR (Agency for Sci., Tech. and Research, S’pore) 2020-06-08T01:56:41Z 2020-06-08T01:56:41Z 2018 Journal Article Kong, L., Mayorga-Martinez, C. C., Guan, J., & Pumera, M. (2018). Fuel-free light-powered TiO2/Pt Janus micromotors for enhanced nitroaromatic explosives degradation. ACS Applied Materials & Interfaces, 10(26), 22427-22434. doi:10.1021/acsami.8b05776 1944-8244 https://hdl.handle.net/10356/141348 10.1021/acsami.8b05776 29916690 2-s2.0-85049577889 26 10 22427 22434 en ACS Applied Materials & Interfaces © 2018 American Chemical Society. All rights reserved. |
| spellingShingle | Science::Chemistry Micromachines Microrobots Kong, Lei Mayorga-Martinez, Carmen C. Guan, Jianguo Pumera, Martin Fuel-free light-powered TiO2/Pt Janus micromotors for enhanced nitroaromatic explosives degradation |
| title | Fuel-free light-powered TiO2/Pt Janus micromotors for enhanced nitroaromatic explosives degradation |
| title_full | Fuel-free light-powered TiO2/Pt Janus micromotors for enhanced nitroaromatic explosives degradation |
| title_fullStr | Fuel-free light-powered TiO2/Pt Janus micromotors for enhanced nitroaromatic explosives degradation |
| title_full_unstemmed | Fuel-free light-powered TiO2/Pt Janus micromotors for enhanced nitroaromatic explosives degradation |
| title_short | Fuel-free light-powered TiO2/Pt Janus micromotors for enhanced nitroaromatic explosives degradation |
| title_sort | fuel free light powered tio2 pt janus micromotors for enhanced nitroaromatic explosives degradation |
| topic | Science::Chemistry Micromachines Microrobots |
| url | https://hdl.handle.net/10356/141348 |
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