A functionalized zirconium-based metal-organic framework/graphene oxide composite material and its preparation method and application

Abstract

The invention discloses a functional zirconium-based metallic organic framework / graphene oxide composite material as well as a preparation method and application thereof. The composite material comprises Uio-66-OH as a carrier which is doped with graphene oxide. The preparation method comprises the following steps: preparing a reaction substrate solution from an organic ligand, a soluble zircon salt, an organic solvent, a high-boiling-point organic solvent and a graphene oxide solution, carrying out a reaction on the reaction substrate solution, repeatedly soaking and centrifuging the reactionproduct, washing, and drying, thereby obtaining the composite material. The composite material disclosed by the invention has the advantages of being low in cost, stable in structure, good in adsorption capability, high in adsorption velocity, and the like, can be widely applied to dye wastewater treatment, has a good removal effect and has high use values and good application prospects, and thepreparation method of the composite material has the advantages of being simple in process, simple in operation condition, easy to control, convenient to operate, easy in raw material obtaining, low in preparation cost, short in synthesis cycle, and the like.

Description

technical field [0001] The invention belongs to the field of material science and engineering, and relates to a functionalized zirconium-based metal organic framework / graphene oxide composite material and a preparation method and application thereof. Background technique [0002] In recent years, water pollution has gradually attracted people's attention and has become a major global environmental problem. With the development of society, various new pollutants continue to enter waters through various channels. Printing and dyeing wastewater has a high proportion, a large amount of production, high organic content, poor biodegradability, and certain toxicity. It is one of the most difficult industrial wastewater to treat. For example, methylene blue (MB) is a kind of cationic dye belonging to aromatic compounds, which is often used in dyeing, medical treatment and analysis and identification, and it may cause serious impact on the environment after it enters the water body....

AI Technical Summary

Problems solved by technology

However, the introduction of different functional groups (such as amino, hydroxyl, and carboxyl) will bring the following disadvantages to the zirconium-based metal-organic framework: the morphology of the zirconium-based metal-organic framework will change accordingly, and it will be irregular. Deformation, the pore size changes, and the specific surface area decreases accordingly; the increase in the length of the organic ligand will reduce the crystallization performance

However, the following problems still exist in the existing graphene oxide-modified metal framework materials: it is necessary to increase the loading amount of graphene oxide to achieve effective material performance, which will inevitably lead to an increase in production costs, and the increase in loading amount will also lead to structural problems. problems such as stability; at the same time, the following deficiencies still exist in the preparation method of the metal framework material modified by graphene oxide, the washing effect is poor, the purification effect is poor, and the impurity content in the obtained product material is high, which is not conducive to reducing energy consumption and production cost

The existence of the above problems limits the wide application of graphene oxide and its composite materials

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