Understanding Chemistry of Two-Dimensional Transition Metal Carbides and Carbonitrides (MXenes) with Gas Analysis.,ACS Nano

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Understanding Chemistry of Two-Dimensional Transition Metal Carbides and Carbonitrides (MXenes) with Gas Analysis.
ACS Nano ( IF 15.8 ) Pub Date : 2020-07-09 , DOI: 10.1021/acsnano.0c03602
Shuohan Huang ₁ , Vadym N Mochalin _{1,

2}

Affiliation

MXenes, a large family of two-dimensional materials that are intensely investigated for a broad range of applications, are unstable in water, spontaneously forming TiO₂. Several hypotheses have been proposed recently to explain the transformations of MXenes in aqueous environments based on characterization of solid products and measurements of solution pH. However, no studies of the gaseous products of these reactions have been reported. In this work, we demonstrate the use of Raman spectroscopy and gas chromatography techniques to study the gaseous reaction products of Ti₂C, Ti₃C₂, Ti₃CN, and Nb₂C MXenes in aqueous environments. Based on the analysis of gases, the reactivities of MXenes with different monolayer thickness and chemical composition have been analyzed. We demonstrate the analysis of gases produced during MXene transformations as a powerful technique that can be used for better understanding of their nontrivial chemistry.

中文翻译：

通过气体分析了解二维过渡金属碳化物和碳氮化物（MXenes）的化学。

MXenes是一类广泛的二维材料，已经广泛研究了广泛的应用，在水中不稳定，自发形成TiO ₂。最近提出了一些假设，以基于固体产物的表征和溶液pH值的测量来解释MXene在水性环境中的转化。然而，尚未报道对这些反应的气态产物的研究。在这项工作中，我们演示了使用拉曼光谱和气相色谱技术研究Ti ₂ C，Ti ₃ C ₂，Ti ₃ CN和Nb ₂的气态反应产物水性环境中的C MXenes。基于气体的分析，分析了具有不同单层厚度和化学组成的MXene的反应性。我们证明了MXene转化过程中产生的气体的分析是一项强大的技术，可用于更好地了解其非平凡的化学反应。

更新日期：2020-08-25

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