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Magnetic cucurbit urils/grapheme oxide composite material and preparation method thereof

A magnetic composite material and graphene technology, applied in the field of materials, can solve the problems of low yield, cumbersome preparation steps, high cost, etc., and achieve the effect of good dispersion, good application prospects, and uniform size

Inactive Publication Date: 2015-06-24
MATERIAL INST OF CHINA ACADEMY OF ENG PHYSICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a melon ring / graphene oxide magnetic composite material and its preparation method in view of the problems of cumbersome preparation steps, low yield and high cost in the existing melon ring immobilization method

Method used

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  • Magnetic cucurbit urils/grapheme oxide composite material and preparation method thereof
  • Magnetic cucurbit urils/grapheme oxide composite material and preparation method thereof
  • Magnetic cucurbit urils/grapheme oxide composite material and preparation method thereof

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Effect test

Embodiment 1

[0047]Graphene oxide was prepared by the Hummers method: under ice bath, in a three-necked flask, 3 g of flake graphite was mixed with 90 mL of concentrated sulfuric acid, then 9 g of potassium permanganate was added in batches (10 times), and stirred After 1 h, raise the temperature to 35 °C and keep it for 2 h, then add 250 mL of deionized water to the system, raise the temperature to 95 °C, keep it for 30 min, add 10 mL of hydrogen peroxide, centrifuge, and wash the solid with 5% hydrochloric acid for 5 times , and finally washed once with ethanol, and the product was dried in an oven at 50 °C for later use.

[0048] 0.25 g of graphene oxide prepared by the Hummers method was placed in 200 mL of deionized water and ultrasonicated for 3 h until it was completely dispersed and exfoliated to obtain the first solution. Transfer the first solution to a 500 mL three-necked bottle, then weigh 0.25 g of six-membered cucurbit rings into the three-necked bottle, stir under a nitrogen...

Embodiment 2

[0051] 0.25 g of graphene oxide prepared by the Hummers method was placed in 200 mL of deionized water and ultrasonicated for 3 h until it was completely dispersed and exfoliated to obtain the first solution. Transfer the first solution to a 500 mL three-necked bottle, then weigh 0.15 g of six-membered cucurbitan rings into the three-necked bottle, stir under a nitrogen gas atmosphere, heat the system to 40 °C, and keep it for 0.5 h to obtain the second solution . Then, 0.768 g of ferrous sulfate heptahydrate and 1.488 g of ferric chloride hexahydrate were added to the second solution, and the system was heated to 85 °C. After the melon ring was dissolved, it was kept for 1 h to obtain the third solution. Finally, 15 mL of 30% ammonia solution was added to the third solution, the reaction was continued for 1 h, and the precipitate was collected by filtration. After the precipitate is washed and dried, the graphene oxide / cucurbit ring magnetic composite material is obtained. ...

Embodiment 3

[0054] 0.25 g of graphene oxide prepared by the Hummers method was placed in 200 mL of deionized water and ultrasonicated for 3 h until it was completely dispersed and exfoliated to obtain the first solution. Transfer the first solution to a 500 mL three-necked bottle, then weigh 0.4 g of six-membered cucurbit rings into the three-necked bottle, stir under a nitrogen gas atmosphere, heat the system to 40 °C, and keep it for 0.5 h to obtain the second solution . Then, 0.768 g of ferrous sulfate heptahydrate and 1.488 g of ferric chloride hexahydrate were added to the second solution, and the system was heated to 85 °C. After the melon ring was dissolved, it was kept for 1 h to obtain the third solution. Finally, 15 mL of 30% ammonia solution was added to the third solution, the reaction was continued for 1 h, and the precipitate was collected. After the precipitate is washed and dried, the graphene oxide / cucurbit ring magnetic composite material is obtained.

[0055] Through ...

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Abstract

The invention discloses a magnetic cucurbit urils / grapheme oxide composite material and a preparation method thereof with an aim to solve problems that an existing cucurbit urils solid loading method is tedious in preparation steps, low in yield and high in cost. The magnetic cucurbit urils / grapheme oxide composite material is made of components comprising, by weight, 1%-20% of cucurbit urils, 1%-30% of grapheme oxide and 50%-80% of ferroferric oxide nanoparticles; the cucurbit urils and the grapheme oxide are mutually connected through hydrogen bonds, and the cucurbit urils and the ferroferric oxide nanoparticles are evenly dispersed on the surface of the grapheme oxide. The advantages of the cucurbit urils, the grapheme oxide and the ferroferric oxide nanoparticles are combined in the magnetic cucurbit urils / grapheme oxide composite material which has excellent uranyl ion adsorption performance and cyclic utilization capability, and potential application values are achieved. Meanwhile, the preparation method is simple in operation, low in production cost, high in yield, capable of meeting requirements on large-scale industrialization application, good in application prospect and worthy of large-scale promotion and application.

Description

technical field [0001] The invention relates to the field of materials, especially the field of preparation of functional composite materials, specifically a melon ring / graphene oxide magnetic composite material and a preparation method thereof. The invention adopts the co-precipitation method to prepare the melon ring / graphene oxide magnetic composite material, the method is simple, the effect is good, and the application prospect is good. Background technique [0002] Cucurbit[n]urils (cucurbit[n]urils, CB[n], n=5~10) are formed by 2n methylene bridges connecting n glycoside urils, and their shape is similar to pumpkins, hence the name cucurbit[n]urils. There is a hydrophobic cavity inside, which can selectively accommodate size and shape matching organic molecules, small gas molecules and other small guest molecules according to the size of the cavity. Therefore, cucurbital rings have been widely used in the fields of molecular catalysis, molecular recognition, ion chann...

Claims

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Application Information

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IPC IPC(8): B01J20/22B01J20/28B01J20/30
Inventor 邵浪任一鸣王晓方仲敬荣王少飞邓辉
Owner MATERIAL INST OF CHINA ACADEMY OF ENG PHYSICS
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