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Graphene solar water cleaning foam and its preparation method and use

A technology of cleaning foam and solar energy, applied in the direction of graphene, chemical instruments and methods, energy input, etc., can solve the problems that graphene needs to be further studied

Active Publication Date: 2020-10-27
弘润清源(北京)科技有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the application of graphene in sewage purification treatment remains to be further studied

Method used

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  • Graphene solar water cleaning foam and its preparation method and use
  • Graphene solar water cleaning foam and its preparation method and use
  • Graphene solar water cleaning foam and its preparation method and use

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0067] 1. Prepare 2mg·mL by oxidized exfoliated graphite (Hummers) method -1 Graphene oxide aqueous solution;

[0068] 2. Mix 200 μL of ethanol with 20 mL of the graphene oxide aqueous solution prepared in step 1 and stir evenly to obtain a mixed solution;

[0069] 3. Freeze the mixed solution obtained in step 2 into blocks at -20°C, and then freeze-dry in a freeze dryer for 24 hours to obtain a graphene oxide foam;

[0070] 4. the graphene oxide foam in step 3 is under argon protection, is heated to 500 ℃ and annealed for 2h to obtain graphene solar water cleaning foam (photo as figure 2 ), the density is 1mg·cm -3 :

[0071] Scanning electron microscope (JSM-7500F, Shimadzu Corporation, Japan) ( image 3 ) characterizes that the inside of the prepared graphene solar water cleaning foam is a three-dimensional porous structure;

[0072] Absorption test (Cary 5000, Varian, USA) absorption spectrum as shown in Figure 4 As shown, the prepared graphene solar water cleaning...

Embodiment 2

[0083] 1. Prepare 15mg·mL by oxidized exfoliated graphite (Hummers) method -1 Graphene oxide aqueous solution;

[0084] 2. Mix 100 μL of ethanol with 20 mL of the graphene oxide aqueous solution prepared in step 1 and stir evenly to obtain a mixed solution;

[0085] 3. Freeze the mixed solution obtained in step 2 into a block at -20°C, and then freeze-dry it in a freeze dryer for 72 hours to obtain a graphene oxide foam;

[0086] 4. Under the protection of argon, heat the graphene oxide foam in step 3 to 1000°C for annealing treatment for 4 hours, and then compress its volume to 1 / 2 of the original volume to obtain graphene solar water cleaning foam with a density of 30mg cm -3 ;

[0087] The inside of the prepared graphene solar water cleaning foam was characterized by scanning electron microscopy as a three-dimensional porous structure;

[0088] Absorption test (Cary 5000, U.S. Varian) characterizes the prepared graphene solar water cleaning foam in the ultraviolet regio...

Embodiment 3

[0093] 1. Prepare 8 mg·mL by oxidation exfoliated graphite (Hummers) method -1 Graphene oxide aqueous solution;

[0094] 2. Mix 200 μL of ethanol with 20 mL of the graphene oxide aqueous solution prepared in step 1 and stir evenly to obtain a mixed solution;

[0095] 3. Freeze the mixed solution obtained in step 2 into a block at -20°C, and then freeze-dry it in a freeze dryer for 72 hours to obtain a graphene oxide foam;

[0096] 4. The graphene oxide foam in step 3 is irradiated with a laser with a power of 1W for 1s to obtain a graphene solar water cleaning foam;

[0097] The inside of the prepared graphene solar water cleaning foam was characterized by scanning electron microscopy as a three-dimensional porous structure;

[0098] Absorption test (Cary 5000, U.S. Varian) characterizes the prepared graphene solar water cleaning foam in the ultraviolet region and about 99% of visible light, and near 100% absorption in near-infrared light;

[0099] Solar water evaporation a...

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Abstract

Disclosed are a graphene solar energy water-cleaning foam, a preparation method therefor and the use thereof. The method for preparing the graphene solar energy water-cleaning foam comprises: (1) subjecting a graphite powder to an oxidative stripping treatment so as to obtain a graphene oxide aqueous solution; (2) mixing the graphene oxide aqueous solution with a low-freezing-point solvent so as to obtain a mixed solution; (3) subjecting the mixed solution to a freeze-drying treatment so as to obtain a large-scale graphene oxide foam; and (4) subjecting the graphene oxide foam to a reduction treatment so as to obtain the graphene solar energy water-cleaning foam.

Description

technical field [0001] The invention relates to the field of functional materials, in particular, the invention relates to graphene solar water cleaning foam and its preparation method and application. Background technique [0002] As a clean energy source, solar energy plays an irreplaceable role in crop growth, energy conversion, and human production and life, and the utilization of solar energy has great social and economic value. In particular, the use of solar energy to convert heat into materials can greatly accelerate the evaporation of water and achieve fresh water resources from seawater and other water bodies. At present, such materials include metal composite films, polymer composite films, and composite materials of various materials. However, these materials have a large volume density, which makes their water cleaning ability per unit mass insufficient, and are easily damaged in some special environments (such as acidic, alkaline, organic matter, heavy metal s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/184C02F1/14
CPCC01B2204/20C01B2204/24C02F1/14Y02P20/133Y02A20/211Y02A20/212
Inventor 曲良体程虎虎张盼盼
Owner 弘润清源(北京)科技有限责任公司
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