Construction Of MOF Materials By Tripod Ligands And Their Electrochemical Properties

The development of society and the progress of science and technology are increasing.It is obvious that people’s material quality of life is improving.However,the accompanying problems are also gradually emerging:energy,environment,health problems and so on.To solve the current situation,scientists have been looking for new materials that are recyclable and clean.Metal-organic framework materials have attracted much attention due to their unique structure.The reason is that MOFs have a large specific surface area and better REDOX characteristics.In order to explore more functional materials based on metal-organic framework,it is of great practical significance to design and synthesize various MOFs as new catalysts.Part one:MOFs is introduced,and then the application examples of some MOF based materials are summarized,and the application status of metal-organic framework materials and their composites in different fields are reviewed.Finally,several MOF materials constructed by tripod ligands are introduced.Part two:this paper discusses in detail the synthesis method and crystal structure of four cases of isomeric crystalline materials obtained by a simple solvothermal method using tripod type（TCA）and linear ligand（4,4’-bipyridine）.The structure,thermal stability and electrochemical catalytic performance of methanol oxidation were investigated.The results showed that the introduction of dissimilar metal could improve the methanol oxidation performance.The experimental results showed that the area activity of methanol oxidation increased to 32.56 m A/cm²,and the mass activity increased to 326.61 m A/mg cm^-2.It is also proved that the introduction of different metals can improve the effectiveness and reliability of the electrocatalytic performance of MOF materials.In the methanol oxidation reaction in alkaline medium,the transition metal-based MOF material has good catalytic ability,which makes it can be used as a good methanol oxidation catalyst carrier in the design and preparation of new methanol oxidation catalysts,and opens up a new research direction for the development of non-precious metal catalysts.Part three:two novel isomorphic two-dimensional MOFs were obtained by a simple solvothermal method using triangle-type（TIB）ligands which were applied to glucose electrochemical sensing.And then improving glucose electrochemical sensing by doping the conductive substance acetylene black（AB）in different proportions.AB/CTGU-31 and AB/CTGU-32 composites were prepared for the modified electrode to optimize the sensing performance of glucose detection.The synergistic effect of the excellent catalytic activity of MOF and good electrical conductivity of AB improved the contact between the modified electrode and the glucose catalytic activity was enhanced.The composite AB/CTGU-32（1:1）has a better detection effect.The experimental results show that the sensitivity of the material to the glucose electrosensing test is 2.198μAμM^-1 cm^-2,the linear range is 10-4000μM,and the detection limit is 0.09μM（S/N=3）.It has good reproducibility,selectivity and stability,and has a good application prospect in the field of electrochemical sensing.Part four:two novel isomorphic three-dimensional metal-organic frame materials were obtained by simple solvothermal method using tripod type（TCA）and linear ligands（2,2’-bipyridine）.The material was combined with Ni₃（NO₃）₂（OH）₄ which was used to explore the performance of supercapacitor.Based on the electrochemical performance test,the experimental results show that the specific capacity of the optimized sample-Ni₃（NO₃）₂（OH）₄@Co-MOF-4@NF is improved,and its specific capacity is increased to 2534m F cm^-2.Part five:summarize and look forward to the work.