Synthesis Of Metal Organic Frameworks And Applied Research

In recent decades,because of the Metal-Organic Frameworks(MOFs)with superior performance in gas adsorption/separation,chemical sensing,catalysis and so on,which have great progress and development.Many scientists on the synthesis methods of metal organic frameworks are studied.Among them,the electrochemical synthesis method by applying external voltage or current electrochemical signal to make the metal ion and ligand binding to generate MOFs.This method is mild and rapidly.Moreover,it can be further applied in other researchs.Based on indium tin oxide conductive glass(ITO)has good conductivity,in this paper,the synthesis of MIL-101(Fe)/ITO,HKUST-1/ITO and its’ parrern on ITO by using the method of electrochemical synthesis.and at the same time,TiO2/Fe2O3 composite materials were prepared by the method of chemical synthesis,the catalytic properties of these materials are also research:1.Electrochemical synthesis of HKUST-1 on ITOFirst of all,electrodeposition a layer of Cu film on the ITO surface,and then put it into a solution containing ligands,the HKUST-1 crystals can be synthesized on the ITO surface by applying constant voltage.Adjusting the dissolution time and voltage,which combined with XRD,SEM,AFM and the other characterization methods,found that the dissolution time and voltage would affect the crystal structuremorphology and density.And the electrodepositon process combined with the electrochemical wet stamp technology(E-WETs)has been achieved by patterning HKUST-1 onto ITO.2.Electrochemical synthesis of HKUST-1 and application in CO catalysisBased on the research of electrochemical synthesis of HKUST-1 on ITO surface,using Cu rod as electrode for synthesis a large number of HKUST-1 powder.HKUST-1 calcined at different temperatures,which combined with XRD,SEM,AFM and the other characterization methods to study the properties of CO catalysis,it shows that the different calcination temperature would affect the structure、morphology and the CO catalytic performance.In particular,360℃-HKUST-1 sample at 250℃ the CO conversion rate is close to 100%.3.Electrochemical synthesis of MIL-101(Fe)on ITOThe MIL-101(Fe)crystals can be synthesized on the ITO by using the method of reductive electrosynthesis.The structure of MIL-101(Fe)was characterized by XRD,and it was concluded that the scan rate could affect the structure of crystal.And MIL-101(Fe)has properties of catalytic oxidation of H2O2.4.Chemical synthesis of TiO2/α-FeaO3 compound and preliminary study on application in CO catalysisMIL-101(Fe)was prepared by the method of Chemical Synthesis.TiO2/a-Fe2O3 compound was systhesized by liquid phase impregnation titanium isopropoxide under vacuum condition and calcined at high temperature.According to the characterization of XRD,SEM and so on,which shows that the compound has a good CO catalysis properties,the conversion rate of CO reached 100%at 280℃.