van der Waals heterojunction between a bottom-up grown doped graphene quantum dot and graphene for photoelectrochemical water splitting
| Autor: | Shuzhou Li, Peng Chen, Wei Huang, Yibo Yan, Dong Zhai, Jie Chen, Yi Liu, Ping Zan, Jun Gong, Zhiping Zeng |
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| Přispěvatelé: | School of Chemical and Biomedical Engineering, School of Materials Science and Engineering, Innovative Centre for Flexible Devices |
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Graphene Quantum Dots
business.industry Graphene General Engineering Chemical engineering [Engineering] General Physics and Astronomy Heterojunction 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences law.invention symbols.namesake Van Der Waals Heterojunction Quantum dot law symbols Water splitting Optoelectronics General Materials Science van der Waals force Doped graphene 0210 nano-technology business |
| Popis: | van der Waals heterojunctions (vdWHs) formed between 2D materials have attracted tremendous attention recently due to their extraordinary properties, which cannot be offered by their individual components or other heterojunctions. Intriguing electronic coupling, lowered energy barrier, intimate charge transfer, and efficient exciton separation occurring at the atomically sharp interface promise their applications in catalysis, which, however, are largely unexplored. Herein, we demonstrate a 0D/2D vdWH between 0D graphene quantum dots (GQDs) and 2D pristine graphene sheets, simply prepared by ultrasonication of graphite powder using GQDs as intercalation surfactant. Such an all-carbon Schottky-diode-like 0D/2D vdWH is employed for the emerging photoelectrochemical catalysis (water splitting) with high performance. The demonstrated low-cost and scalable bottom-up growth of heteroatom-doped GQDs will greatly promote their widespread applications. Moreover, the mechanisms underlying GQD growth and heterojunction-mediated catalysis are revealed both experimentally and theoretically. Accepted version |
| Databáze: | OpenAIRE |
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