Graphene oxide/phosphamide composite material and preparation method thereof

A composite material and phosphoramide technology, applied in the field of uranyl ion adsorption materials and materials, can solve the problems of difficult separation and insufficient adsorption capacity, and achieve the effects of low production cost, simple operation and excellent uranyl ion adsorption performance.

Inactive Publication Date: 2017-02-15
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

However, the adsorption capacity of graphene oxide for uranium is insufficient, and graphene oxide is difficult to separate from the aqueous phase due to its excellent hydrophilicity.

Method used

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  • Graphene oxide/phosphamide composite material and preparation method thereof
  • Graphene oxide/phosphamide composite material and preparation method thereof
  • Graphene oxide/phosphamide composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] 1. Sample preparation

[0048] (1) Synthesis of graphene oxide

[0049] Add 1g of graphite powder into a 250mL round-bottomed flask containing 23mL of concentrated sulfuric acid, stir for 30min, put it in an ice-water bath, and add 3g of KMnO 4 Slowly added to the solution, and continued to stir at 35 °C for 2 h to obtain the first solution. Subsequently, 50mL of ultrapure water was added to the first solution, and the temperature was raised to 90°C, and then 140mL of ultrapure water and 2.5mL of H 2 o 2 (that is, adding a low-concentration hydrogen peroxide solution) to obtain a reaction solution. The reaction solution was filtered to obtain a black solid, which was washed with dilute hydrochloric acid and ultrapure water respectively to obtain a brownish-yellow primary filter. Put the primary filter in a dialysis bag, and dialyze it with ultrapure water several times to remove soluble impurities; finally, centrifuge at 10,000 rpm for 2 hours, and dry it in vacuum ...

Embodiment 2

[0070] (1) Synthesis of graphene oxide

[0071] Add 1g of graphite powder into a 250mL round-bottomed flask containing 24mL of concentrated sulfuric acid, stir for 28min, put it in an ice-water bath, and add 3g of KMnO 4 Slowly added to the solution, and continued to stir at 35 °C for 1.8 h to obtain the first solution. Subsequently, 55mL of ultrapure water was added to the first solution, and the temperature was raised to 90°C, and then 145mL of ultrapure water and 2.5mL of H 2 o 2 (that is, adding a low-concentration hydrogen peroxide solution) to obtain a reaction solution. The reaction solution was filtered to obtain a black solid, which was washed with dilute hydrochloric acid and ultrapure water respectively to obtain a brownish-yellow primary filter. Put the primary filter in a dialysis bag, and dialyze it with ultrapure water several times to remove soluble impurities; finally, centrifuge at 10,000 rpm for 2 hours, and dry it in vacuum at 60°C for 2 hours to obtain ...

Embodiment 3

[0078] (1) Synthesis of graphene oxide

[0079] Add 1g of graphite powder into a 250mL round bottom flask containing 23mL of concentrated sulfuric acid, stir for 45min, place in an ice-water bath, and then add 3.2g of KMnO 4 Slowly added to the solution, and continued to stir at 36 °C for 2 h to obtain the first solution. Subsequently, 60mL of ultrapure water was added to the first solution, and the temperature was raised to 88°C, and then 140mL of ultrapure water and 2.5mL of H 2 o 2 (that is, adding a low-concentration hydrogen peroxide solution) to obtain a reaction solution. The reaction solution was filtered to obtain a black solid, which was washed with dilute hydrochloric acid and ultrapure water respectively to obtain a brownish-yellow primary filter. Put the primary filter in a dialysis bag, and dialyze it with ultrapure water several times to remove soluble impurities; finally, centrifuge at 10,000 rpm for 2.2 hours, and dry it in vacuum at 60°C for 2 hours to obtai...

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Abstract

The invention discloses a graphene oxide / phosphamide composite material and a preparation method thereof. The invention aims to solve the problems that the adsorption capacity of graphene oxide for uranium is insufficient and the graphene oxide is difficult to be separated from an aqueous phase due to excellent hydrophilia of graphene oxide. The graphene oxide / phosphamide composite material contains the following components by weight percent: 85%-95% of graphene oxide and 5%-15% of phosphamide. The graphene oxide / phosphamide composite material can be used for effectively solving the problems that the adsorption capacity of graphene oxide for uranium is insufficient and the graphene oxide is difficult to be separated from the aqueous phase due to excellent hydrophilia of graphene oxide. The graphene oxide / phosphamide composite material has high practical value in purifying metal or organic wastewater. Meanwhile, the preparation method provided by the invention is simple in operation, low in production cost and high in yield, can meet the requirements of industrial large-scale production and application, has wider application prospect and higher market value and is worthy of large-scale popularization and application.

Description

technical field [0001] The invention relates to the field of materials, especially the field of uranyl ion adsorption materials, specifically a graphene oxide / phosphoramide composite material and a preparation method thereof. The invention can effectively solve the problems that the existing graphene oxide has insufficient adsorption capacity of uranyl and is difficult to separate from the water phase, and has high application value and good application prospect. Background technique [0002] Graphene is a two-dimensional crystal with a thickness of only a single atomic layer. It is also a new member of the family of nano-carbon materials. It is obtained by infinitely repeating carbon six-membered rings in planar space. Its unique structure endows graphene with many excellent properties, such as good electrical properties, thermal properties, mechanical properties, etc. Graphene-like materials prepared by chemical redox methods, such as graphene oxide (GO for short) and red...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/30C02F1/28C02F1/62
CPCB01J20/20B01J20/28033C02F1/281C02F2101/34
Inventor 任一鸣邵浪唐浩吴昊曦王少飞赵建龙仲敬荣
Owner MATERIAL INST OF CHINA ACADEMY OF ENG PHYSICS
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