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Carbon dot/polyurethane composite material as well as preparation method and application thereof

A composite material, polyurethane technology, applied in chemical instruments and methods, organic compound/hydride/coordination complex catalysts, chemical/physical processes, etc., can solve separation difficulties, small size of carbon dots, and unreported inventions, etc. problems, to achieve the effect of simple preparation process, easy separation and environmental friendliness

Active Publication Date: 2021-08-03
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 size of carbon dots is small, and it is difficult to separate them when used alone. It needs to be combined with solid-phase materials. The composite material of synthesized carbon dots is convenient for application.
So far, no related inventions using carbon dots for photocatalytic enrichment of uranium have been reported

Method used

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  • Carbon dot/polyurethane composite material as well as preparation method and application thereof
  • Carbon dot/polyurethane composite material as well as preparation method and application thereof
  • Carbon dot/polyurethane composite material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] (1) Synthesize yellow light carbon dots by hydrothermal method: weigh 2.3g of neutral red with a balance and dissolve in 60mL of ethylene glycol, and stir for 30 minutes. Then it was transferred to a polytetrafluoroethylene-lined stainless steel hydrothermal reactor and reacted at 200°C for 4 hours. After the reaction was finished, it was naturally cooled to room temperature, and the reacted solution and solid were taken out, and centrifuged and washed with a mixed solution of n-hexane and acetone (volume ratio: 95:5). After centrifugation, take the supernatant in a beaker, which is the carbon dot solution used later, and its concentration is 0.1g / L.

[0035](2) Synthesis of carbon dots / polyurethane composite material: Polyurethane is a commercially available polyurethane foam, which is cut into cubes of 2cm*2cm*2cm (the porosity of the polyurethane foam is 93%). Get 20mL of the carbon dot solution in step (1), immerse the polyurethane foam block (0.2g) in the carbon d...

Embodiment 2

[0044] (1) Synthesize yellow light carbon dots by hydrothermal method: weigh 2.3g of neutral red with a balance and dissolve in 60mL of ethylene glycol, and stir for 30 minutes. Then it was transferred to a polytetrafluoroethylene-lined stainless steel hydrothermal reactor and reacted at 200°C for 4 hours. After the reaction was finished, it was naturally cooled to room temperature, and the reacted solution and solid were taken out, and centrifuged and washed with a mixed solution of n-hexane and acetone (volume ratio: 95:5). After centrifugation, take the supernatant in a beaker, and this supernatant is the carbon dot solution used later.

[0045] (2) Synthesis of carbon dots / polyurethane composites:

[0046] Take 10g of polyethylene glycol and 5g of 4,4'-dicyclohexylmethane diisocyanate, stir and mix evenly, and react at a constant temperature of 80°C to obtain product A; add 10PEG-2000, 0.7g of simethicone and 0.7g of liquid paraffin, drop 3 Drop dibutyltin dilaurate, con...

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Abstract

The invention relates to the technical field of preparation of carbon dots and carbon dot composite materials, in particular to a carbon dot / polyurethane composite material and a preparation method and application thereof. The preparation method comprises the following steps of: dissolving neutral red in ethylene glycol, uniformly stirring and mixing, reacting at 200 DEG C for 4 hours, centrifugally washing with a mixed solution of n-hexane and acetone, taking supernate to prepare a carbon dot solution, immersing polyurethane foam in the carbon dot solution, standing, taking out, cleaning and airing to obtain the carbon dot / polyurethane composite material. The carbon dot / polyurethane composite material disclosed by the invention is simple in preparation process, environment-friendly, low in cost and easy to obtain, can accelerate transmission of electrons and substances when being used for photocatalytic enrichment of uranium, has improved photocatalytic performance, is easy to separate after the reaction is finished, and is convenient for subsequent reuse.

Description

technical field [0001] The invention relates to the technical field of preparation of carbon dots and carbon dot composite materials, in particular to a carbon dot / polyurethane composite material and its preparation method and application. Background technique [0002] Energy is the cornerstone of the development of modern society. With the continuous progress of the economy, the demand for energy, especially clean energy, is becoming more and more urgent. Nuclear power is a clean energy that plays an important role in future energy supply. The reserves of uranium, the main fuel, directly threaten the sustainable development of nuclear power. my country is a country with depleted uranium, and the reserves of uranium resources are small and the grade is poor. In addition, uranium has both radiotoxicity and heavy metal toxicity, which poses a threat to the environment and human health. Therefore, finding unconventional uranium sources, such as seawater uranium extraction, nu...

Claims

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Application Information

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IPC IPC(8): B01J31/06B82Y20/00B82Y40/00C02F1/30C22B60/02C22B7/00C02F101/20
CPCB01J31/069B01J31/06B82Y20/00B82Y40/00C02F1/30C22B60/0278C22B7/006C02F2101/006C02F2101/20C02F2305/10B01J35/40B01J35/39Y02P10/20
Inventor 王哲张康杰李斌商海林王祥科
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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