Catalytic Degradation Of Antibiotics Using Iron Phthalocyanine Supported By Polyester Nanofibers

With the development of society,the pollution of water resources has attracted more and more attention.Industrial waste is the largest source of water pollution,most of these wastewater contains large amounts of toxic pollutants,such as chlorinated aromatic compounds,antibiotics,conjugated dyes.These compounds are seriously harmful for organisms and humans.The traditional advanced oxidation technology suffer from the problems of low utilization of H₂O₂,poor catalytic activity of refractory organic pollutants and the difficulty to reuse of catalysts.Therefore,designing a kind of catalysts with highly efficient catalytic oxidization of target pollutants can be of great significance.Metal phthalocyanine is a macrocyclic conjugated macromolecule similar to the active metal porphyrin of cytochrome P-450,and has similar catalytic activity.The catalytic process is mainly through the coordination of central metal ions with reactants.Different catalytic activities can be achieved by loading on different carriers.Polyester fiber with high strength,wear resistance,dimensional stability,and has good resistance to weak acid and weak alkaline.Therefore,we can choose polyester fiber as the carrier of metal phthalocyanine,prepare supported metal phthalocyanine,study the catalytic performance of catalytic system and explore the catalytic mechanism.In this paper,poly?4-vinylpyridine?and polyester fibers were combine together by electrospinning,two kinds of nanofibers with different ratios of 1: 1 and 1: 5 were prepared.Then,the metal iron phthalocyanine was loaded on the nanofibers by refluxing.The morphology of the prepared catalyst FePc-P4 VP / PET was characterized by FE-SEM,FePc was successfully coordinated on carbon nanotubes by axial ligands under the characterizations of UV-vis,XPS,ATR-FTIR and other methods.For the FePc-P4 VP / PET which prepared by using the ratio of polyester fibers with poly?4-vinylpyridine?of 1: 1,sulfaquinoxaline was used as the reactants and H₂O₂ as the oxidant.The catalyst was found to have a strong ability to degrade the reactants.The influence of temperature,H₂O₂ concentration and pH on the catalytic performance was also studied.And through isopropanol influence experiment,electron paramagnetic resonance?EPR?test and GCMS analysis of the substrate of oxidized DMSO showed that the high-valence iron active species dominated in this catalytic system.For the FePc-P4 VP / PET which prepared by using the ratio of poly?4-vinylpyridine?with polyester fibers of 1: 5,sulfamethoxazole as the reactants and,PMS as the oxidant,and irradiated with ultraviolet light.The results showed that t FePc-P4 VP / PET could be activated PMS to degradate Sulfamethoxazole in the presence of light.The effect of PMS concentration and pH on the catalytic system was also studied.And through isopropanol influence experiment,electron paramagnetic resonance?EPR?test showed that the catalytic system has a large number of hydroxyl radicals.Which indicates that the hydroxyl radical is the dominant role in the system.