fe(iii)-salen functionalized nanofe 3 o 4 Composite materials, preparation methods and applications

Abstract

The invention discloses a Fe(III)-Salen functionalized nano Fe3O4 composite material as well as a preparation method and application thereof. The preparation method comprises the following steps: preparing an amino-functionalized nano Fe3O4 magnetic composite material (NH2-nFe3O4) by adopting a solvothermal method, condensing with o-hydroxy-containing substituted benzaldehyde so as to obtain Salen functionalized nano Fe3O4 (nFe3O4@Salen), and further complexing with Fe(III), thereby obtaining the nFe3O4@Fe(III)Salen composite material. The product obtained by the method disclosed by the invention is powdered and brown, and is uniform in particle size distribution and stable in property. NH2-nFe3O4 prepared by the solvothermal method overcomes the defect of agglomeration of a magnetic material solution, and the obtained material is high in dispersity and excellent in magnetic property; Salen obtained by condensing amino and o-hydroxy-containing substituted benzaldehyde is fast in reaction, readily available in raw materials and high in yield; the material is enriched in amino, hydroxyl and other functional groups; and due to the Fe(III) active center, a Fenton-like system is immobilized onto the magnetic Fe3O4 material, the composite material has a wide pH application range, dual functions of catalysis and magnetism of the material are realized, and separation and recovery of catalysts are promoted.

Description

technical field The invention relates to a kind of Fe(III)-Salen functionalized nano-Fe 3 o 4 Composite materials, preparation methods and application technologies, specifically Fe(III)-Salen functionalized nano-Fe 3 o 4 Composite material and preparation method thereof, and utilizing Fe(III)-Salen functionalized nanometer Fe of the present invention 3 o 4 The composite material is used as a catalyst to degrade new environmental pollutants such as chlorophenols and plasticizers in water, so as to achieve environmental protection and other purposes. Background technique Persistent environmental pollutants such as chlorophenols, phthalates and heavy metals are widely used in industrial and agricultural production. Trace amounts of these new environmental pollutants will be enriched in water, soil, animals and plants, difficult to degrade in the environment, interfere with the endocrine system of the human body, directly affect the metabolism of the human body, and even ha...

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Problems solved by technology

Coilins et al. (Accounts Chemical Research, 2002, 35(9): 782–790.) systematically studied a non-porphyrin ring, non-phthalocyanine ring N-Fe coordination compound TAML, which can effectively activate H 2 o 2 , realize the rapid oxidation of trichlorophenol and pentachlorophenol, TAML has a high conversion number, showing superior photocatalytic activity, but unfortunately TAML itself is unstable and easily decomposed by oxidation, and the regeneration and separation of the catalyst remains a major challenge to overcome

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