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Application of graphene aerogel in removing uranium through photocatalysis

A graphene aerogel, photocatalytic technology, applied in the field of environmental pollution control, to achieve the effects of high removal capacity, excellent performance and low price

Active Publication Date: 2020-09-04
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the use of graphene airgel for the photocatalytic removal of uranium and the study of its photocatalytic mechanism have not been reported yet.

Method used

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  • Application of graphene aerogel in removing uranium through photocatalysis
  • Application of graphene aerogel in removing uranium through photocatalysis
  • Application of graphene aerogel in removing uranium through photocatalysis

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Measure 15 mL of the above graphene oxide solution into a 5 mL beaker, stir and sonicate for 40 min to further peel off the graphene oxide sheet. Move the mixed solution into a polytetrafluoroethylene-lined stainless steel reaction kettle, then put the reaction kettle into an oven, set the reaction temperature to 200° C., and the reaction time to 12 hours. Cool naturally after the reaction is over, and then take the product out of the reactor. Soak and rinse with clean water to remove unreacted substances on the surface. Put it into a freeze-drying box for freeze-drying. After the product is dry, take it out and name it GA-200.

Embodiment 2

[0038] Same as Example 1, the difference is that the reaction temperature is set to 140°C, and the others are the same as in Example 1, named GA-140.

Embodiment 3

[0040] The reaction temperature is set to 160°C, and the others are the same as in Example 1, named GA-160.

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PUM

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Abstract

The invention discloses application of graphene aerogel in removing uranium through photocatalysis. According to the invention, the graphene aerogel is put into a uranium-containing solution, a methanol sacrificial agent is added, the uranium-containing solution and the methanol sacrificial agent are stirred and contact with each other in a dark box, and then a light source is turned on to performa photocatalytic reaction so as to remove uranium in the solution. The invention also discloses a preparation method of the graphene aerogel. The preparation method comprises the following steps: with graphite as a raw material, preparing graphene oxide, preparing an aqueous graphene oxide solution, further carrying out ultrasonic stirring, and further stripping a graphene oxide sheet layer to obtain a mixed solution; and roasting the obtained mixed solution at a high temperature, conducting cooling, cleaning a product, and carrying out freeze drying to obtain the graphene aerogel. The graphene aerogel prepared by the method has excellent photocatalytic performance on uranium, the uranium removal capacity is up to 1050 mg / g, and the graphene aerogel still has very high activity after being recycled five times.

Description

technical field [0001] The invention relates to the technical field of environmental pollution control, in particular to the application of a graphene airgel in photocatalytic removal of uranium. Background technique [0002] As an alternative energy source to fossil fuels, nuclear energy can provide cheap electricity without releasing greenhouse gases, and is the direction of future energy development. Uranium is an important nuclear fuel. With the vigorous development of nuclear energy, the demand for uranium is also increasing year by year. In addition, uranium-containing wastewater will be produced during the nuclear fuel cycle and accidental nuclear accidents, which pollutes the environment and threatens human health. Therefore, actively mining uranium resources, further developing fuel reprocessing technology, and seeking new methods and materials for the treatment of uranium-containing wastewater are the key to protecting the environment and alleviating the shortage ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G21F9/12B01J21/18B01J35/00B01J35/04
CPCG21F9/12B01J21/18B01J35/23B01J35/56B01J35/39
Inventor 王哲黄丽钦张康杰王祥科
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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