SiO₂@MIL-88A Was Used For Photo-Fenton Degradation Of Printing And Dyeing Wastewater And Chiral Molecular Cage RCC3 Was Used For Decarboxylation Mannich To Construct Chiral Sulfonamide

In recent years,the development of porous materials,especially metal-organic porous materials and organic porous materials,has received widespread attention.Because of their rich structure,diverse functions and regulation,they have a wide range of applications in adsorption separation,catalysis,biodegradation,photoelectric materials and other fields.In this paper,the application of metal-organic frameworks(MOF)and organic supramolecular cages in dye degradation and asymmetric catalysis,respectively,was explored.The full text is divided into four chapters:The first chapter,combined with the research direction of this paper,first introduces the important role played by MOF-based materials in the treatment of pollutants in water.It is mainly divided into three directions:1,adsorption and removal of heavy metal ions in water;2,photocatalytic degradation of synthetic fuels in water;3,the application of membrane separation technology in water purification.It not only expounds the development history of MOF in the above aspects,but also summarizes different modification methods and classic cases.Secondly,the unique supramolecular structure characteristics of the molecular cage are introduced.Based on the two main development directions of metal-organic molecular cages and porous organic molecular cages,the application of molecular cages in catalysis and separation is emphasized.In the second chapter,the core-shell material of Si O₂@MIL-88A was obtained by loading the metal-organic framework MIL-88A with photo-Fenton activity on the surface of the silicon ball with easy-to-prepare,inexpensive and highly modifiable silica nanospheres as the carrier The structure of the material is characterized including XRD,infrared,SEM,ICP,etc.,and the performance studies have shown that the material can perform efficient light on a series of dyes such as MO,AR-18,MB,etc Fenton degradation,its degradation efficiency at room temperature is as high as 96%.Its cycle experiments show that Si O₂@MIL-88A core shell can be recycled and reused,and the degradation rate remains high during the seventh cycle.The third chapter,based on the classically available chiral porous organic cage CC3,explores its application in the asymmetric catalytic decarboxylation Mannich reaction after coordinating the modification of copper ions.The results showed that the unique chiral structure of the molecular cage could construct chiral sulfonamide with high reaction efficiency and selective catalytic decarboxylation Mannich reaction,and the substrate adapted to a wide range,especially suitable for aliphatic?-ketoacid substrates.The fourth chapter summarizes and looks forward to the work of the whole paper.