Preparation method of functional graphene oxide sponge

Abstract

The invention provides a preparation method of a functional graphene oxide sponge. According to the method, sulfonated calix [4] arene and GO (graphene oxide) are synthesized firstly, sulfonated calix[4] arene and GO are subjected to a hydrothermal reaction, grapheme hydrogel is prepared and subjected to freeze drying, and sulfonated calix [4] arene modified 3D S-GOS (stereoscopic-graphene oxidesponge) is obtained. The material is subjected to characterization analysis with analytical means such as SEM, EDS, FT-IR, XRD and the like. With the adoption of a static adsorption method, influenceof pH value, ion strength, adsorption time, initial uranium concentration and temperature of an initial solution on S-GOS adsorbed uranium (VI) is researched, and adsorption kinetics and adsorption thermodynamics of the S-GOS are studied. The regeneration-recycle performance of the S-GOS adsorbed uranium (VI) is investigated finally. The synthesis method is simple, one new material with large superficial area and high supramolecular recognition and enrichment capacity is obtained, and the material is good in adsorptive property, convenient to recycle and excellent in biocompatibility.

Description

technical field The invention belongs to the field of material preparation, and in particular relates to a preparation method of functionalized graphene oxide sponge. Background technique In recent years, graphene, as a two-dimensional material, has attracted great attention from scholars at home and abroad due to its remarkable and unique properties, such as excellent mechanical properties and extremely high specific surface area. There are also extensive researches in the field of adsorption, but two-dimensional graphene-based adsorbents are easy to agglomerate and not easy to recycle during application, which limits their application in the field of adsorption and separation. The three-dimensional graphene-based macroscopic body has a three-dimensional network-like porous structure and large size, has good adsorption performance and is easy to collect and recycle, and has potential applications in wastewater treatment. Calixarenes are considered to be the third-generati...

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Problems solved by technology

However, due to the poor water solubility of most calixarenes, they are often used in organic solvents such as toluene, chloroform, methylene chloride, etc. when applying calixarene, which brings environmental pollution

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