| Porous organic materials are novel porous materials that are connected together by building units.They are composed of light elements such as carbon,hydrogen,boron,and oxygen,and therefore have a lower skeleton density.The highly ordered porosity and the infinite potential for easy functionalization of porous organic materials have attracted widespread attention from scientists.The interconnected pore structure gives the material the ability to accommodate other materials.At the same time,specific modifications can provide sites for targeted binding to the target,so they are widely used in gas adsorption and separation,heterogeneous catalysis and so on.In addition,with the continuous development of the economy,the unpleasant discharge of industrial wastewater has caused serious pollution of groundwater,drinking water,soil and ambient air,such as the growth of drug-resistant bacteria caused by the abuse of large quantities of drugs,textiles,paper,and pharmaceuticals.Pollution of organic dyes caused by wastewater discharge from industries such as leather and paper.Based on the above research background,two kinds of covalent organic porous materials,ie,covalent organic framework material(named COFs-Trif-Benze)and amorphous POPs materials(named PPOPs-SO3H),were designed and synthesized in this thesis.Application in photodynamic sterilization and dye adsorption in industrial wastewater.The specific research content is as follows:By solvothermal method,2,4,6-tris(4-formylphenoxy)-1,3,5-triazine and biphenyldiamine were reacted under mild conditions to design and synthesize a kind of Triazine-based covalent organic framework porous materials(COFs-Trif-Benz).The target material was characterized by powder X-ray diffraction,solid nuclear magnetic and nitrogen adsorption and desorption,and its ordered structure and porous properties were proved.Due to its porosity,large π-conjugated structure and strong photoelectric conversion properties,COFs-Trif-Benz is used for photodynamic sterilization.The experimental results show that COFs-Trif-Benz has excellent photodynamic inactivation in both gram-negative bacteria(E.coli)and gram-positive bacteria(S.aureus).The study on its bactericidal mechanism found that the material can achieve sterilization effect by generating singlet oxygen,which is an irreversible sterilization process.Therefore,COFs-Trif-Benz can be used as a photosensitizer for photodynamic sterilization.The porphyrin-based porous organic polymers(PPOPs-OH)were synthesized using DNHDA and pyrrole as building blocks,and the porphyrin ring and surface rich hydroxyl sites in the molecule were used to further react with chlorosulfonic acid at room temperature.The simple and effective modification of the sulfonic acid group to the surface of the material yields PPOPs-SO3H.The material has good selective adsorption performance for methylene blue,and the maximum adsorption capacity reaches 980.4 mg-1g.The adsorption performance remains basically unchanged after five cycles.The results show that the material has good potential for application in wastewater treatment. |
