Two-dimensional transition metal carbon (nitride) compounds (MXenes), as a new class of two-dimensional materials, have unique hydrophilicity, excellent mechanical properties, abundant surface functional groups, high electrical conductivity, photothermal and photoelectric effects and other properties. It has become a research hotspot and is widely used in electromagnetic shielding, electrochemical energy storage, biomedicine, separation, sensors and seawater desalination. Although MXenes have these excellent properties, their poor compatibility with hydrophobic polymers, negatively charged functional groups hinder electrolyte transport, and easy oxidation limit their practical applications. In recent years, through the interface regulation of MXenes to solve its inherent defects, and on this basis, the targeted structural design of MXenes is carried out to improve the interface stability, and its performance has been further improved.





Recently, the team of Professor Xie Yanjun and Associate Professor Liang Daxin from the School of Materials Science and Engineering of Northeast Forestry University published a review article entitled "Development of MXenes Composites: Interface Regulation and Structural Design" in the "Three High" journal "Journal of Chemistry of Universities". The first author is doctoral student Ba Zhichen. With the theme of interface regulation and structural design of two-dimensional transition metal carbon (nitride) compounds (MXenes), this paper systematically reviews the research progress of MXenes composites, focusing on the controllable preparation, routine characterization and hotspots of MXenes composites research direction. In addition, the article also focuses on the structure and properties of MXenes and the interface regulation of MXenes in composites, and expounds the structural design of MXenes composites.



MXenes Structural Design and Application

Through a full understanding of the structure and properties of MXenes, the advantages and applicable fields of MXenes can be recognized, and a theoretical foundation for their interface regulation and structure optimization can be laid. Abundant functional groups can be formed on the surface of MXenes by etching, intercalation and other methods, and the performance of MXenes composites can be further improved by regulating through different physical and chemical means (functional group removal or replacement, doping, grafting, etc.). On this basis, the structure of MXenes in the composite material is optimized to improve the structural stability and interface bonding strength of the composite material, which can further improve its performance. Through the summary of related research work, it can be seen that after modification and structural optimization of MXenes, the electrochemical, photothermal, microwave absorption, hydrophilic and hydrophobic properties have been greatly improved. The thermal stability, chemical stability and anti-oxidation properties of MXenes can be improved by chemical regulation of the surface of MXenes. Finally, for the structural design, the current research mainly focuses on the design of MXenes two-dimensional nanosheet structure and the research on two-dimensional and three-dimensional composite structures. It is necessary to explore the influence mechanism of MXenes on the performance of composite materials on the existing basis, so as to help deepen its performance. understanding and regulation.

In the end, the paper discusses the current problems and challenges in the controllable preparation and interfacial structure-dependent research of MXenes composites in this field, and the prospect of future research breakthroughs in MXenes composites and heterogeneous devices.

Literature details:

Development of MXenes composites: interface regulation and structural design.

Ba Zhichen, Liang Daxin*, Xie Yanjun*. Journal of Chemistry in Higher Education Institutions, 2021, 42 (4): 1225-1240.