Construction Of Nanoscale Fe₃O₄/AgCl And MOF Complexes And Their Application In Adsorption And Catalysis

Metal-organic frameworks?MOFs?are a class of hybrid organic-inorganic supramolecular materials that have attracted more and more researchers'attention because of their adjustable pore size and large specific surface area.Here,many studies have found that MOFs materials can achieve some special applications,including in gas storage and separation,drug release,chemical sensing and wastewater treatment.More importantly,the introduction of functional groups in organic ligands or the use of MOFs as the main substance for the introduction of other active components,can greatly expand their application.This thesis mainly chose two kinds of classic MOF,designed and synthesized new MOF-based functional materials,and studies its adsorption and catalytic performance of dyes.The main work is as follows:1.Through a one-step method,magnetic Fe₃O₄/ZIF-67 with core-shell structure was synthesized.Among four common dyes,it showed good performance of selective adsorption for Congo red?CR?dye.It not only has a fast adsorption speed but also has a higher adsorption capacity than other inorganic materials and exhibits excellent structural stability.2.The petal-like Fe₃O₄@ZIF-67 composite was further synthesized by solvothermal method,which showed the photocatalysis of CR after adsorption equilibrium.The prepared nanomaterial exhibited excellent magnetic cycling performance,and under alkaline conditions,we studied its kinetic behavior and it showed better photocatalysis.More importantly,the catalyst can be recovered magnetically.3.The AgCl/UiO-66 heterojunction structure was prepared by a simple and rapid method using UiO-66 as the matrix.During the process of catalytic degradation of Rhodamine?RhB?,the prepared AgCl/UiO-66 heterojunction sample exhibited good photocatalytic activity under visible light irradiation,and its catalytic performance was higher than pure AgCl and pure UiO-66,respectively.The reason for its improved catalytic performance may be due to the fact that the heterojunction structure promotes efficient separation of photogenerated electrons and holes.