Carrier engineering of carbon nitride boosts visible-light photocatalytic hydrogen evolution
Carbon nitride, as one of the metal-free photocatalysts, has aroused wide attention due to its low cost, easy preparation, and excellent optical response. However, challenges of the high recombination rate of electron-hole pair hindered their potential applications. Here, boron-doped carbon nitride...
| 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/10356/159391 |
| _version_ | 1811676586802413568 |
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| author | Bao, Hong Wang, Liang Li, Gao Zhou, Li Xu, Yun Liu, Zheng Wu, Minghong |
| author2 | School of Materials Science and Engineering |
| author_facet | School of Materials Science and Engineering Bao, Hong Wang, Liang Li, Gao Zhou, Li Xu, Yun Liu, Zheng Wu, Minghong |
| author_sort | Bao, Hong |
| collection | NTU |
| description | Carbon nitride, as one of the metal-free photocatalysts, has aroused wide attention due to its low cost, easy preparation, and excellent optical response. However, challenges of the high recombination rate of electron-hole pair hindered their potential applications. Here, boron-doped carbon nitride nanotubes were designed and prepared by a simple hydrothermal and calcination route. Compared with the bulk carbon nitride, the control strategy forms the ordered nanotube structure, which greatly improved their specific surface area, exposed more active sites, and enhanced the graphitization degree. The transient fluorescence lifetime of tubular carbon nitride is twice as long as that of pure carbon nitride. Furthermore, boron doping carbon nitride nanotubes exhibited a 1.5-fold increase in a lifetime over tubular carbon nitride, which acts a synergistic role with nanotube architecture to further increases the carrier concentration and hinder the recombination of photogenerated electron-hole. Under the irradiation of visible light, the amount of hydrogen evolution of the optimum photocatalyst has achieved 22.1 mmol g−1 h−1, which was 64 times that of the bulk carbon nitride and exhibited excellent stability. This work provides a promising strategy for the development of non-metallic doped carbon nitride nanotube photocatalysts for hydrogen evolution. |
| first_indexed | 2024-10-01T02:23:50Z |
| format | Journal Article |
| id | ntu-10356/159391 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T02:23:50Z |
| publishDate | 2022 |
| record_format | dspace |
| spelling | ntu-10356/1593912022-06-16T06:32:16Z Carrier engineering of carbon nitride boosts visible-light photocatalytic hydrogen evolution Bao, Hong Wang, Liang Li, Gao Zhou, Li Xu, Yun Liu, Zheng Wu, Minghong School of Materials Science and Engineering Engineering::Materials Carbon Nitride Nanotube Architecture Carbon nitride, as one of the metal-free photocatalysts, has aroused wide attention due to its low cost, easy preparation, and excellent optical response. However, challenges of the high recombination rate of electron-hole pair hindered their potential applications. Here, boron-doped carbon nitride nanotubes were designed and prepared by a simple hydrothermal and calcination route. Compared with the bulk carbon nitride, the control strategy forms the ordered nanotube structure, which greatly improved their specific surface area, exposed more active sites, and enhanced the graphitization degree. The transient fluorescence lifetime of tubular carbon nitride is twice as long as that of pure carbon nitride. Furthermore, boron doping carbon nitride nanotubes exhibited a 1.5-fold increase in a lifetime over tubular carbon nitride, which acts a synergistic role with nanotube architecture to further increases the carrier concentration and hinder the recombination of photogenerated electron-hole. Under the irradiation of visible light, the amount of hydrogen evolution of the optimum photocatalyst has achieved 22.1 mmol g−1 h−1, which was 64 times that of the bulk carbon nitride and exhibited excellent stability. This work provides a promising strategy for the development of non-metallic doped carbon nitride nanotube photocatalysts for hydrogen evolution. The project was funded by National Natural Science Foundation of China (Nos. 21901154, 21671129), the Program for Changjiang Scholars and Innovative Research Team in University (No. IRT17R71). 2022-06-16T06:32:16Z 2022-06-16T06:32:16Z 2021 Journal Article Bao, H., Wang, L., Li, G., Zhou, L., Xu, Y., Liu, Z. & Wu, M. (2021). Carrier engineering of carbon nitride boosts visible-light photocatalytic hydrogen evolution. Carbon, 179, 80-88. https://dx.doi.org/10.1016/j.carbon.2021.04.018 0008-6223 https://hdl.handle.net/10356/159391 10.1016/j.carbon.2021.04.018 2-s2.0-85104342301 179 80 88 en Carbon © 2021 Elsevier Ltd. All rights reserved. |
| spellingShingle | Engineering::Materials Carbon Nitride Nanotube Architecture Bao, Hong Wang, Liang Li, Gao Zhou, Li Xu, Yun Liu, Zheng Wu, Minghong Carrier engineering of carbon nitride boosts visible-light photocatalytic hydrogen evolution |
| title | Carrier engineering of carbon nitride boosts visible-light photocatalytic hydrogen evolution |
| title_full | Carrier engineering of carbon nitride boosts visible-light photocatalytic hydrogen evolution |
| title_fullStr | Carrier engineering of carbon nitride boosts visible-light photocatalytic hydrogen evolution |
| title_full_unstemmed | Carrier engineering of carbon nitride boosts visible-light photocatalytic hydrogen evolution |
| title_short | Carrier engineering of carbon nitride boosts visible-light photocatalytic hydrogen evolution |
| title_sort | carrier engineering of carbon nitride boosts visible light photocatalytic hydrogen evolution |
| topic | Engineering::Materials Carbon Nitride Nanotube Architecture |
| url | https://hdl.handle.net/10356/159391 |
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