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 Ti₃C₂MXene 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 Ti₃C₂MXene derivatives,showcasing extensive research prospects in the fields of energy storage,catalysis,sensing,and more.Taking Ti₃C₂as 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 。

Contents

1 Introduction

2 In-situ transformation of MXene for hybrid materials

2.1 In-situ transformation of MXene

2.2 In-situ reaction of metal ions on the surface of MXene

2.3 Assembly of MOF with MXene

3 Application of MXene derived nanocomposites

3.1 Energy storage

3.2 Sensor

3.3 Catalysis

4 Summary and outlook