Study On The Synthesis Of Porous Organic Polymers And Their Adsorption And Catalytic Performance

In areas such as energy technology,sustainable development,clean water and healthy living,people are actively seeking porous polymers to meet today's challenges.They are an integral part of modern industry and daily life,for example,in soft sponges,fabrics and filters/isolators,they can provide clean water and/or improve battery power.In addition to its large surface area,porous polymers also have high processability,cheap resources,light weight,and a variety of chemical properties for modification and functionalization.Porous Organic Polymers(POPs)have higher specific surface area,lighter composition elements,and well-defined porous structure.Their unique charge characteristics have excellent performance in adsorption separation and catalysis.Become a hot spot in current scientific research.In this paper,three kinds of porous organic polymer materials are designed and synthesized,and the three polymer materials are structurally characterized,and their adsorption and catalytic properties are studied according to the different structural characteristics.In Chapter 2 of this paper,we report the synthesis of an ionic liquid functionalized covalent organic polymer(ICOP).It synthesizes ionic covalent organic polymers(ICOPs)from 1,2,4-triazolium ionic liquids and boric acid esters through a Suzuki coupling reaction in one step.ICOP has an amorphous structure and good thermal and chemical stability.It exhibits excellent adsorption performance in the adsorption of methyl blue,shows high selectivity in the adsorption of mixed dyes,and is used in multiple cycles.It still has high adsorption performance.The ionic covalent organic polymer(ICOP)is different from other materials in that the polymer itself has a cationic skeleton and can remove anionic dyes through the synergistic effect of ion exchange and pore adsorption.The adsorption equilibrium of 400 mg L~-11 of ICOP on MB can be achieved in 20 minutes,which is much faster than non-ionic COP.In addition,after 10consecutive cycles,ICOP has high stability,and the removal rate of MB exceeds 85%.At the same time,it is also proved that ICOP is effective for the selective adsorption of rhodamine B or methyl orange to the mixed dye of MB in aqueous solution.This work heralds the rational design of the practical application of ICOP in wastewater treatment.In the third chapter of this paper,we report a nitrogen-doped porous carbon material.The material is a porous polyionic liquid film that directly obtains a nitrogen-doped porous carbon film through one-step vacuum carbonization.The research focus of this material is on energy Production/transformation systems and environmental remediation.In this paper,we find that porous polyionic liquid membranes are vacuum carbonized to form N-doped hierarchical porous membranes(HNCM),which can rapidly,stably,and efficiently electrosynthesize arylboroxanes under ambient conditions.This method shows excellent performance in the synthesis of arylboroxanes with a wide range of functional groups.We show that by using HNCM as an electrode,an electrode with a working area of??5.0 cm x 3.0 cm and a thickness of 73?m,8.05 g of arylboroxine can be synthesized in 7 hours with an isolation yield of86%,which fully demonstrates that Its potential as an industrial electrosynthesis system.In the fourth chapter of this paper,starting from the heterogeneous field where porous materials are most widely used,the paper uses the characteristics of the most valuable covalent organic polymer materials(COFs)in porous organic polymers to prepare Heterogeneous catalyst with excellent catalytic performance.COFs have a well-defined pore structure,large surface area,and good chemical and physical stability.Among them,the feature of being almost insoluble in organic solvents is indispensable as a heterogeneous catalyst.Based on the many advantages of COFs,we designed and synthesized a Salen-COF.This COF material is a good precursor for coordination of many metal ions due to its N,O vacancies and adjusted pore structure.-salen-COF still has a large specific surface area and stable chemical structure.Based on the above advantages,we use Pd-salen-COF for the Suzuki coupling reaction.Compared with other reported homogeneous catalysts,the catalyst can be used at lower temperature(60°C)and shorter time(5h).The isolated yield reached 87%,and the synthesized catalyst had high cycle stability.After 5 cycles,the yield could still reach 72%.Therefore,the catalyst is considered to be one of the most promising materials in the field of heterogeneous catalysis.