MXene的原位转化与应用

In Situ Transformation and Application of MXene

MXene即二维过渡金属碳化物、氮化物或碳氮化物,是一类新兴的二维材料,具有广阔的应用前景。层状结构的MXene具有丰富的表面端基官能团(—F,—O和—OH),与第二相材料具有广泛的兼容性,在构建多功能、高性能杂化材料时展现出巨大潜能。本文以Ti_(3)C_(2)MXene为例,归纳了基于MXene的原位转化的杂化材料(原位衍生、金属离子杂化和MOF材料杂化)的制备以及转化机理,总结了MXene杂化材料在能源存储(锂硫电池、超级电容器和氢能存储)、传感和催化领域的应用,指出了MXene原位转化研究中尚待解决的问题,同时展望了未来的发展方向。

MXene is a new class of two-dimensional transition metal carbides and nitrides which serves as a versatile and promising material with a wide range of applications in various fields.Layered MXene has abundant surface end-group functional groups(−F,−O and−OH)and a wide range of compatibility with second-phase materials,showing great potential in the construction of multi-functional,high-performance hybrid materials.Research has found that Ti_(3)C_(2) MXene nanosheets have a disadvantage of easy interlayer stacking during use,which is detrimental to ion/electron transport.The in-situ transformation of MXene provides a new approach to address this issue.During the in-situ transformation process of MXene materials,the loading of the second-phase material is controllable and can effectively suppress the interlayer stacking effect of MXene nanosheets.At the same time,by selecting and controlling the second-phase material,it is possible to achieve the directional construction of multifunctional,high-performance hybrid materials.The in-situ transformed hybrid materials can integrate the large specific surface area,metallic conductivity,high active sites of MXene,and the intrinsic properties of the selected second-phase material.Recently,there has been rapid development in the preparation and application of composite materials based on Ti_(3)C_(2) MXene derivatives,showcasing extensive research prospects in the fields of energy storage,catalysis,sensing,and more.Taking Ti_(3)C_(2) as an example,this article summarizes the preparation and transformation mechanisms of MXene-based in-situ converted hybrid materials(in-situ derived,metal ion hybridization,and MOF material hybridization).It also summarizes the applications of MXene hybrid materials in energy storage(lithium-sulfur batteries,supercapacitors,and hydrogen storage),sensors,and catalysis.The article points out the unresolved issues in MXene in-situ transformation research and outlines the future development directions for scientific research.It hopes to provide new research ideas for scholars in this field and contribute to the development of nanomaterials with functional properties.