Scalable Synthesis of Ti3C2Tx MXene
Scalable Synthesis of Ti3C2Tx MXene
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DOI：
10.1002/adem.201901241
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发表时间：
2020-02-03
影响因子：
3.6
通讯作者：
Gogotsi, Yury
中科院分区：
文献类型：
--
作者：
Shuck, Christopher E.;Sarycheva, Asia;Gogotsi, Yury
由于合成瓶颈，将合成二维材料的生产规模扩大到工业数量面临着重大挑战，其中很少有大量生产的材料。这些挑战通常源于自下而上的方法，将生产限制在底物尺寸或化学合成和/或剥离的前体可用性上。相比之下，MXenes是一大类2D过渡金属碳化物和/或氮化物，是通过自上而下的合成方法生产的。选择性湿法蚀刻工艺不像其他二维材料具有类似的合成限制。反应发生在整个体积内；因此，该工艺可以很容易地按反应器体积进行缩放。本文以1和50 g两种批量化为研究对象，研究了二维碳化钛MXene （Ti3C2Tx）的合成，以确定大体积合成是否会影响MXene片的结构或组成。利用扫描电子显微镜、x射线衍射、动态光散射、拉曼光谱、x射线光电子能谱、紫外可见光谱和电导率测量对所生产的MXene的形貌和性能进行表征，结果表明，两批生产的材料本质上是相同的。这说明MXenes在缩放合成时不会改变结构或性质，使其具有进一步缩放和商业化的可行性。
Scaling the production of synthetic 2D materials to industrial quantities has faced significant challenges due to synthesis bottlenecks whereby few have been produced in large volumes. These challenges typically stem from bottom-up approaches limiting the production to the substrate size or precursor availability for chemical synthesis and/or exfoliation. In contrast, MXenes, a large class of 2D transition metal carbides and/or nitrides, are produced via a top-down synthesis approach. The selective wet etching process does not have similar synthesis constraints as some other 2D materials. The reaction occurs in the whole volume; therefore, the process can be readily scaled with reactor volume. Herein, the synthesis of 2D titanium carbide MXene (Ti3C2Tx) is studied in two batch sizes, 1 and 50 g, to determine if large-volume synthesis affects the resultant structure or composition of MXene flakes. Characterization of the morphology and properties of the produced MXene using scanning electron microscopy, X-ray diffraction, dynamic light scattering, Raman spectroscopy, X-ray photoelectron spectroscopy, UV-visible spectroscopy, and conductivity measurements show that the materials produced in both batch sizes are essentially identical. This illustrates that MXenes experience no change in structure or properties when scaling synthesis, making them viable for further scale-up and commercialization.