Understanding and preventing oxidative degradation of MXene suspensions is essential for fostering fundamental academic studies and facilitating widespread industrial applications. Owing to their outstanding electrical, electrochemical, optoelectronic, and mechanical properties, MXenes, an emerging class of two-dimensional (2D) nanomaterials, show promising state-of-the-art performances in various applications including electromagnetic interference (EMI) shielding, terahertz shielding, electrochemical energy storage, triboelectric nanogenerators, thermal heaters, light-emitting diodes (LEDs), optoelectronics, and sensors. However, MXene synthesis using harsh chemical etching causes many defects or vacancies on the surface of the synthesized MXene flakes. Defective sites are vulnerable to oxidative degradation reactions with water and/or oxygen, which deteriorate the intrinsic properties of MXenes. In this review, we demonstrate the nature of oxidative degradation of MXenes and highlight the recent advancements in controlling the oxidation kinetics of MXenes with several promising strategic approaches, including careful control of the quality of the parent MAX phase, chemical etching conditions, defect passivation, dispersion medium, storage conditions, and polymer composites.

中文翻译：

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改善2D MXene的氧化稳定性：合成，存储介质和条件

了解和防止MXene悬浮液的氧化降解对于促进基础学术研究和促进广泛的工业应用至关重要。由于其出色的电，电化学，光电和机械性能，MXenes是新兴的一类二维（2D）纳米材料，在包括电磁干扰（EMI）屏蔽，太赫兹在内的各种应用中均显示出令人鼓舞的最新性能屏蔽，电化学储能，摩擦纳米发电机，热加热器，发光二极管（LED），光电和传感器。然而，使用苛刻的化学蚀刻合成MXene会在合成的MXene薄片的表面上引起许多缺陷或空位。缺陷部位很容易与水和/或氧气发生氧化降解反应，这会降低MXene的固有特性。在这篇综述中，我们展示了MXenes氧化降解的本质，并重点介绍了通过几种有前景的战略方法控制MXenes氧化动力学的最新进展，包括仔细控制母体MAX相的质量，化学蚀刻条件，缺陷钝化，分散介质，储存条件和聚合物复合材料。