Efficient nano-regional photocatalytic heterostructure design via the manipulation of reaction site self-quenching effect
Heterostructural photocatalysts with rationally aligned energy bands have been proved effective in diminishing the recombination of photo-induced excitons, thus leading to enhanced photocatalytic performance. However, the critical role of charge carrier behaviors and their quenching pathway in deter...
| Main Authors: | , , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2021
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/150544 |
| _version_ | 1811681373409247232 |
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| author | Feng, Han Liang, Liangliang Liu, Yu Huang, Zhaohong Li, Lin |
| author2 | School of Civil and Environmental Engineering |
| author_facet | School of Civil and Environmental Engineering Feng, Han Liang, Liangliang Liu, Yu Huang, Zhaohong Li, Lin |
| author_sort | Feng, Han |
| collection | NTU |
| description | Heterostructural photocatalysts with rationally aligned energy bands have been proved effective in diminishing the recombination of photo-induced excitons, thus leading to enhanced photocatalytic performance. However, the critical role of charge carrier behaviors and their quenching pathway in determining the overall photocatalytic performance are still not fully explored, which severely hindered the development for efficient photocatalysts. Herein, to further explore the essential principles of photocatalysis with heterostructures, a representative nano-regional photocatalytic heterostructure was constructed through uniform decoration of visible light activable BiOI nanodots on TiO2 nanorod assembled microflowers. With which as a well-known prototype of conventional heterostructures, a possible photocatalytic performance annihilation channel via reaction site self-quenching effect in photocatalytic heterostructures was experimentally evidenced for the first time. Based on our experimental results, we evidenced that excessive decoration with BiOI nanodots would result in severe self-quenching of their photocatalytic sites through highly probable charge carrier recombination between migrating electrons along TiO2 nanorods and reactive holes in adjacent BiOI nanodots. Such fundamental and experimental discovery is not limited to the current model and would shed light on the development of novel nano-regional heterostructures with high photocatalysis performance. |
| first_indexed | 2024-10-01T03:39:55Z |
| format | Journal Article |
| id | ntu-10356/150544 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T03:39:55Z |
| publishDate | 2021 |
| record_format | dspace |
| spelling | ntu-10356/1505442021-06-01T03:13:16Z Efficient nano-regional photocatalytic heterostructure design via the manipulation of reaction site self-quenching effect Feng, Han Liang, Liangliang Liu, Yu Huang, Zhaohong Li, Lin School of Civil and Environmental Engineering School of Mechanical and Aerospace Engineering Nanyang Environment and Water Research Institute Advanced Environmental Biotechnology Centre (AEBC) Singapore Institute of Manufacturing Technology Engineering::Environmental engineering Photocatalytic Site Self-quenching Heterostructural photocatalysts with rationally aligned energy bands have been proved effective in diminishing the recombination of photo-induced excitons, thus leading to enhanced photocatalytic performance. However, the critical role of charge carrier behaviors and their quenching pathway in determining the overall photocatalytic performance are still not fully explored, which severely hindered the development for efficient photocatalysts. Herein, to further explore the essential principles of photocatalysis with heterostructures, a representative nano-regional photocatalytic heterostructure was constructed through uniform decoration of visible light activable BiOI nanodots on TiO2 nanorod assembled microflowers. With which as a well-known prototype of conventional heterostructures, a possible photocatalytic performance annihilation channel via reaction site self-quenching effect in photocatalytic heterostructures was experimentally evidenced for the first time. Based on our experimental results, we evidenced that excessive decoration with BiOI nanodots would result in severe self-quenching of their photocatalytic sites through highly probable charge carrier recombination between migrating electrons along TiO2 nanorods and reactive holes in adjacent BiOI nanodots. Such fundamental and experimental discovery is not limited to the current model and would shed light on the development of novel nano-regional heterostructures with high photocatalysis performance. Nanyang Technological University We acknowledge the support from the Surface Technology Group of Singapore Institute of Manufacturing Technology including experimental and characterization equipment. We also thank the Advanced Environmental Biotechnology Centre of Nanyang Environment and Water Research Institute for the financial support (AEBC M060380006.70602200). 2021-06-01T03:13:16Z 2021-06-01T03:13:16Z 2019 Journal Article Feng, H., Liang, L., Liu, Y., Huang, Z. & Li, L. (2019). Efficient nano-regional photocatalytic heterostructure design via the manipulation of reaction site self-quenching effect. Applied Catalysis B: Environmental, 243, 220-228. https://dx.doi.org/10.1016/j.apcatb.2018.10.045 0926-3373 0000-0002-9840-8367 https://hdl.handle.net/10356/150544 10.1016/j.apcatb.2018.10.045 2-s2.0-85055631506 243 220 228 en AEBC M060380006.70602200 Applied Catalysis B: Environmental © 2018 Elsevier B.V. All rights reserved. |
| spellingShingle | Engineering::Environmental engineering Photocatalytic Site Self-quenching Feng, Han Liang, Liangliang Liu, Yu Huang, Zhaohong Li, Lin Efficient nano-regional photocatalytic heterostructure design via the manipulation of reaction site self-quenching effect |
| title | Efficient nano-regional photocatalytic heterostructure design via the manipulation of reaction site self-quenching effect |
| title_full | Efficient nano-regional photocatalytic heterostructure design via the manipulation of reaction site self-quenching effect |
| title_fullStr | Efficient nano-regional photocatalytic heterostructure design via the manipulation of reaction site self-quenching effect |
| title_full_unstemmed | Efficient nano-regional photocatalytic heterostructure design via the manipulation of reaction site self-quenching effect |
| title_short | Efficient nano-regional photocatalytic heterostructure design via the manipulation of reaction site self-quenching effect |
| title_sort | efficient nano regional photocatalytic heterostructure design via the manipulation of reaction site self quenching effect |
| topic | Engineering::Environmental engineering Photocatalytic Site Self-quenching |
| url | https://hdl.handle.net/10356/150544 |
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