Research progress on modulation,characterization and chemical defense application of defect-engineered Zr-based metal-organic frameworks materials
Zirconium-based metal-organic frameworks(Zr-MOFs)materials,with the advantages of large surface area,high porosity,easy functionalization,simple and rich synthesis methods,and outstanding stability,manifest great application potential in the fields of gas adsorption and separation,catalysis,and sensing.Appropriate defects in Zr-MOFs can change their physicochemical properties without destroying the structure,and significantly improve adsorption and catalysis performance.Therefore,it is of great significance to regulate the defect structure via defect engineering,accurately characterize the defect information by various technical means,and promote the practical application of defective Zr-MOFs in specific fields.In this review,the main methods,including template method and post-synthetic modification method,for defect regulation in Zr-MOFs were introduced,followed by discussion on the commonly used technical methods for defect characterization as well as the advantages and disadvantages of these methods.Then,the application of defect-engineered Zr-MOFs in the field of chemical defense was reviewed,with emphasis on the adsorption of toxic industrial chemicals,catalytic degradation of chemical warfare agents,gas sensing and separation.Finally,the development directions of defective Zr-MOFs were prospected.
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