In Situ N-Doped Graphene and Mo Nanoribbon Formation from Mo2Ti2C3 MXene Monolayers
In Situ N-Doped Graphene and Mo Nanoribbon Formation from Mo2Ti2C3 MXene Monolayers
复制标题
Mo 2 Ti 2 C 3 MXene 单层原位 N-掺杂石墨烯和 Mo 纳米带的形成
DOI：
10.1002/smll.201907115
复制
发表时间：
2020-01-14
期刊：
影响因子：
13.3
通讯作者：
Rummeli, Mark Hermann
中科院分区：
文献类型：
--
作者：
Mendes, Rafael Gregorio;Ta, Huy Quang;Rummeli, Mark Hermann
自2011年单层2D过渡金属碳化物和氮化物（MXenes）出现以来，不同单层系统的数量及其研究一直在增加。Mo2Ti2C3是研究最少的MXene之一，对这种材料的新见解对该领域具有价值。本文研究了Mo_2Ti_2C_3在电子辐照下的稳定性。透射电子显微镜（TEM）被用来研究原位的结构和元素的变化。据发现，Mo_2Ti_2C_3是相当稳定的第一个2分钟的照射。然而，此后发生了结构变化，引发了日益迅速和重大的重新安排。这导致形成孔隙和两种新的纳米材料，即N掺杂的石墨烯膜和Mo纳米带。该研究提供了深入了解Mo2Ti2C3单层对电子辐照的稳定性，这将允许使用TEM对该材料进行可靠的未来研究。此外，这些发现将促进在快速发展的电子束驱动化学和纳米材料工程领域的进一步研究。
Since the advent of monolayered 2D transition metal carbide and nitrides (MXenes) in 2011, the number of different monolayer systems and the study thereof have been on the rise. Mo2Ti2C3 is one of the least studied MXenes and new insights to this material are of value to the field. Here, the stability of Mo2Ti2C3 under electron irradiation is investigated. A transmission electron microscope (TEM) is used to study the structural and elemental changes in situ. It is found that Mo2Ti2C3 is reasonably stable for the first 2 min of irradiation. However, structural changes occur thereafter, which trigger increasingly rapid and significant rearrangement. This results in the formation of pores and two new nanomaterials, namely, N-doped graphene membranes and Mo nanoribbons. The study provides insight into the stability of Mo2Ti2C3 monolayers against electron irradiation, which will allow for reliable future study of the material using TEM. Furthermore, these findings will facilitate further research in the rapidly growing field of electron beam driven chemistry and engineering of nanomaterials.