Design,Synthesis And Photocatalytic Performance Of Transition Metal Microporous Materials Constructed With Aminobenzoic Acid

As the simplest raw material for organic production,phenol is widely used in various chemical industries.However,when the content of phenolic compounds is seriously exceeded,it will lead to the death of aquatic plants and crops.Therefore,some measures must be taken to deal with the environmental pollution.In recent years,degradation technologies using metal-organic framework materials as photocatalysts have many advantages such as being non-toxic,safe,low in degradation cost,high in stability,no secondary pollution after degradation,adjustable pore channels,predictable structures and so on.Therefore,it becomes the first choice to deal with this environmental problem.Among materials that use a metal organic framework as a photocatalyst,aminobenzoic compounds are the most common organic ligands.Because of its stable structure,strong coordination ability and rich coordination modes,it can usually form infinite structures by linking with metals through covalent bonds.At the same time,there are usually many hydrogen bonds in the molecule,making its thermal stability relatively high.Therefore,in this work,aminobenzoic acid: 5-aminoisophthalic acid(H2L)as ligand,transition metal Co(II),Zn(II),Ni(II),Cd(II),Pb(II)and Mn(II)are metal sources.Eight kinds of transition metal complexes have been successfully prepared by high-temperature reaction method and characterized by IR spectra,UV-Vis spectra,X-ray single crystal diffraction,X-ray diffraction and TG analysis.Simultaneously,different concentrations of phenol were used to simulate environmental sewage and the synthesized complexes were used as catalysts for degradation experiments.The kinetic analysis was used to systematically analyze the degradation process and its degradation mechanism was discussed.