| Metal organic framework has attracted widespread attentions in the fields of chemistry,materials and physics due to its large specific surface area,adjustable pore size,regular pore channels and modifiable surface chemistry and topological structure diversity.And the size,morphology and defects of MOF materials have a great impact on their characterisitics in many applications such as ion conduction,chemical sensing,drug delivery,catalysis,gas adsorption and separation.However,the precise regulation of MOF crystal size and defects is still an important challenge.Herein,seed growth method and post-synthesis method are used respectively to prepare the Zr-based metal-organic framework UiO-66 crystal with precise adjustable size and ligand defects.On this basis,the MOF crystals are integrated into optical chemical sensor devices through self-assembly to investigate the effect of ligand defects on ethanol vapor sensing performance,and to explore an experimental method suitable for the study of ion conductivity of MOF powder materials.The specific content is divided into the following aspects:(1)By exploring the nucleation and growth process of the crystal,we change the conditions and control the heterogeneous nucleation of the crystal to promote its heterogeneous growth,and precisely regulate the size of the UiO-66 crystal by seed growth methods.(2)The defects of UiO-66 crystals were precisely increased and repaired by the post-synthesis method.On this basis,the MOF crystals are integrated into optical chemical sensor devices through self-assembly to investigate the effect of ligand defects on ethanol vapor sensing performance.(3)To explore an experimental method suitable for studying the ion conductive properties of powder MOF materials,we synthesized UiO-66,MIL-101,MIL-53 and MCIF-1 and integrated them into electrochemical devices using different methods.And their sodium ion conductivity properties were tested by electrochemical methods. |
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