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van der Waals Heterojunction between a Bottom-Up Grown Doped Graphene Quantum Dot and Graphene for Photoelectrochemical Water Splitting.
ACS Nano ( IF 15.8 ) Pub Date : 2020-01-16 , DOI: 10.1021/acsnano.9b09554 Yibo Yan 1, 2 , Dong Zhai 3, 4 , Yi Liu 3 , Jun Gong 2 , Jie Chen 2 , Ping Zan 2 , Zhiping Zeng 2 , Shuzhou Li 5 , Wei Huang 1 , Peng Chen 2
ACS Nano ( IF 15.8 ) Pub Date : 2020-01-16 , DOI: 10.1021/acsnano.9b09554 Yibo Yan 1, 2 , Dong Zhai 3, 4 , Yi Liu 3 , Jun Gong 2 , Jie Chen 2 , Ping Zan 2 , Zhiping Zeng 2 , Shuzhou Li 5 , Wei Huang 1 , Peng Chen 2
Affiliation
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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.
中文翻译：
自下而上生长的掺杂石墨烯量子点和石墨烯之间的范德华异质结，用于光电化学水分解。
二维材料之间形成的范德华异质结（vdWH）最近因其非凡的性能而引起了极大的关注，它们的单个组件或其他异质结无法提供这种特性。令人着迷的电子耦合，降低的能垒，紧密的电荷转移以及在原子尖锐的界面处发生的有效激子分离，有望在催化领域中得到应用，然而，在催化领域还没有被广泛研究。本文中，我们演示了在0D石墨烯量子点（GQD）和2D原始石墨烯片之间的0D / 2D vdWH，它是通过使用GQDs作为插层表面活性剂对石墨粉末进行超声处理而简单制备的。这种全碳肖特基二极管类0D / 2D vdWH被用于高性能的新兴光电化学催化（水分解）。杂原子掺杂GQD的低成本和可扩展的自下而上的增长将极大地促进其广泛应用。此外，实验和理论上揭示了GQD生长和异质结介导的催化作用的机理。
更新日期：2020-01-17
中文翻译：
自下而上生长的掺杂石墨烯量子点和石墨烯之间的范德华异质结，用于光电化学水分解。
二维材料之间形成的范德华异质结（vdWH）最近因其非凡的性能而引起了极大的关注，它们的单个组件或其他异质结无法提供这种特性。令人着迷的电子耦合，降低的能垒，紧密的电荷转移以及在原子尖锐的界面处发生的有效激子分离，有望在催化领域中得到应用，然而，在催化领域还没有被广泛研究。本文中，我们演示了在0D石墨烯量子点（GQD）和2D原始石墨烯片之间的0D / 2D vdWH，它是通过使用GQDs作为插层表面活性剂对石墨粉末进行超声处理而简单制备的。这种全碳肖特基二极管类0D / 2D vdWH被用于高性能的新兴光电化学催化（水分解）。杂原子掺杂GQD的低成本和可扩展的自下而上的增长将极大地促进其广泛应用。此外，实验和理论上揭示了GQD生长和异质结介导的催化作用的机理。
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