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首页> 外文期刊>RSC Advances >In situ synthesis of copper nanoparticles encapsulated by nitrogen-doped graphene at room temperature via solution plasma
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In situ synthesis of copper nanoparticles encapsulated by nitrogen-doped graphene at room temperature via solution plasma

机译：原位合成通过溶液等离子体在室温下通过氮掺杂石墨烯包封的铜纳米粒子

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Metal–carbon core–shell nanostructures have gained research interest due to their better performances in not only stability but also other properties, such as catalytic, optical, and electrical properties. However, they are limited by complicated synthesis approaches. Therefore, the development of a simple method for the synthesis of metal–carbon core–shell nanostructures is of great significance. In this work, a novel Cu–core encapsulated by a N-doped few-layer graphene shell was successfully synthesized in a one-pot in-liquid plasma discharge, so-called solution plasma (SP), to our knowledge for the first time. The synthesis was conducted at room temperature and atmospheric pressure by using a pair of copper electrodes submerged in a DMF solution as the precursor. The core–shell structure of the obtained products was confirmed by HR-TEM, while further insight information was explained from the results of XRD, Raman, and XPS measurements. The obtained Cu-core encapsulated by the N-doped few-layer graphene shell demonstrated relatively high stability in acid media, compared to the commercial bare Cu particles. Moreover, the stability was found to depend on the thickness of the N-doped few-layer graphene shell which can be tuned by adjusting the SP operating conditions.
机译：金属 - 碳核 - 壳纳米结构由于其在不仅具有稳定性的更好的性能而且还具有催化，光学和电性能等其他性能而获得的研究兴趣。然而，它们受到复杂合成方法的限制。因此，开发一种合成金属 - 碳核 - 壳纳米结构的简单方法具有重要意义。在这项工作中，通过N掺杂的几层石墨烯壳包封的新型Cu-核在一盆内液相色血等离子体放电，所谓的溶液等离子体（SP）中成功地合成了我们的知识。通过使用浸没在DMF溶液中的一对铜电极作为前体，在室温和大气压下进行合成。通过HR-TEM确认所获得的产品的核心壳结构，而从XRD，拉曼和XPS测量结果中解释了进一步的洞察信息。与商业裸露Cu颗粒相比，通过N掺杂的几层石墨烯壳包封的所得Cu-芯在酸性介质中表现出相对高的稳定性。此外，发现稳定性取决于通过调节SP操作条件来调节的n掺杂的少数层石墨烯壳的厚度。

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