Nano zero-valent iron modified composite mesoporous material and preparation method and application thereof

Abstract

The invention discloses a nano zero-valent iron modified composite mesoporous material and a preparation method and application thereof. The material is prepared by the following steps: (1) combininga ZSM-5 molecular sieve treated by diluted hydrochloric acid with a graphene oxide solution by a solution blending method, evaporating to dryness, carrying out centrifugal washing for multiple times,and grinding the dried product into powder for later use; and (2) dispersing ferrite and the powdery product obtained in the step (1) in a solvent, adding a mixed solution of a reducing agent and sodium sulfide nonahydrate, and reacting to obtain the nano zero-valent iron modified composite mesoporous material. The preparation process is simple, the preparation cost is low, and the preparation rawmaterials are environment-friendly; the prepared nano zero-valent iron modified composite mesoporous material has good dispersity in an aqueous solution, a large number of oxygen-containing functional groups are reserved in the material, the limitation that nano zero-valent iron is prone to agglomeration and passivation is overcome, and the composite mesoporous material can effectively remove organic pollutants and has wide application prospects in the aspect of water resource treatment.

Description

technical field [0001] The invention belongs to the technical field of composite materials, and in particular relates to a preparation method and application of a nanometer zero-valent iron modified composite mesoporous material. Background technique [0002] Nanoscale zero-valent iron (nZVI) refers to zero-valent iron particles with a particle size of 1 to 100 nm. It has the advantages of wide source, rich content, low price, strong reducibility, and environmental friendliness. In wastewater treatment and environmental remediation. But at the same time, there are still many problems in the practical application of nZVI: ① Easy to agglomerate, nZVI itself has the characteristics of small particle size and strong magnetism, and often agglomerates together due to surface effects, which not only reduces the reaction sites in contact with pollutants, but also enters the environment Afterwards, it is difficult to recycle and reuse; ②Easy passivation, nZVI exposed to water and ai...

AI Technical Summary

Problems solved by technology

The applicant unexpectedly found that the composite mesoporous material prepared in this way can solve the problem of easy aggregation and passivation of nano-zero-valent iron, and the material retains the hydrophilic oxygen-containing functional groups of graphene oxide, which can be combined with nano-zero-valent iron A synergistic effect occurs, which strengthens the dispersion and reactivity of nano-zero-valent iron in practical applications, and provides a new idea for solving environmental pollution

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