Cao Fangcheng, Zhang Ye, Wang Hongqing, Khan Karim, Tareen Ayesha Khan, Qian Wenjing, Zhang Han, Ågren Hans
Lab of Optoelectronic Technology for Low Dimensional Nanomaterials, School of Chemistry and Chemical Engineering, University of South China, Hengyang, 421001, China.
Shenzhen Engineering Laboratory of Phosphorene and Optoelectronics, College of Phyiscs and Optoelectronic Engineering, Shenzhen University, Shenzhen, 518060, China.
Adv Mater. 2022 Apr;34(13):e2107554. doi: 10.1002/adma.202107554. Epub 2022 Feb 17.
As an emerging star of 2D nanomaterials, 2D transition metal carbides and nitrides, named MXenes, present a large potential in various research areas owing to their intrinsic multilayer structure and intriguing physico-chemical properties. However, the fabrication and application of functional MXene-based devices still remain challenging as they are prone to oxidative degradation under ambient environment. Within this review, the preparation methods of MXenes focusing on the recent investigations on their thermal structure-stability relationships in inert, oxidizing, and aqueous environments are systematically introduced. Moreover, the key factors that affect the oxidation of MXenes, such as, atmosphere, temperature, composition, microstructure, and aqueous environment, are reviewed. Based on different scenarios, strategies for avoiding or delaying the oxidation of MXenes are proposed to encourage the utilization of MXenes in complicated environments, especially at high temperature. Furthermore, the chemistry of MXene-derived oxides is analyzed, which can offer perspectives on the further design and fabrication of novel 2D composites with the unique structures of MXenes being preserved.
作为二维纳米材料的一颗新星，二维过渡金属碳化物和氮化物，即MXenes，由于其固有的多层结构和引人入胜的物理化学性质，在各个研究领域都展现出了巨大的潜力。然而，基于功能化MXene的器件的制备和应用仍然具有挑战性，因为它们在环境条件下容易发生氧化降解。在这篇综述中，系统地介绍了MXenes的制备方法，重点关注了它们在惰性、氧化和水性环境中热结构稳定性关系的最新研究。此外，还综述了影响MXenes氧化的关键因素，如气氛、温度、组成、微观结构和水性环境。基于不同的情况，提出了避免或延缓MXenes氧化的策略，以促进MXenes在复杂环境中，特别是在高温下的应用。此外，还分析了MXene衍生氧化物的化学性质，这可以为进一步设计和制造保留MXenes独特结构的新型二维复合材料提供思路。
