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Graphene-based photothermal conversion material and preparation and application methods thereof

A light-to-heat conversion material and light-to-heat conversion technology, applied in the field of light conversion, can solve the problem of high cost of concentrators

Inactive Publication Date: 2019-03-12
NANKAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For photothermal steam generation, in order to improve the efficiency of photothermal conversion, it is generally necessary to add a concentrator to increase the energy density of light by 10-1000 times, and the concentrator is generally very expensive

Method used

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  • Graphene-based photothermal conversion material and preparation and application methods thereof
  • Graphene-based photothermal conversion material and preparation and application methods thereof
  • Graphene-based photothermal conversion material and preparation and application methods thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0094] Disperse a certain amount of graphene oxide in ethanol to prepare a dispersion with a concentration of 0.5 mg / mL. Take out 70 mL of the dispersion, pour it into a 100 mL stainless steel reaction kettle with a Teflon lining, and react at 180° C. for 12 hours. Transfer the prepared graphene oxide material containing ethanol to an appropriate container, and then slowly replace the ethanol with water. Wherein the graphene oxide material is first placed in a series of mixed solutions of ethanol and water with multiple concentration gradients, wherein the ratio of ethanol and water in the series of mixed solutions is 10:1, 5: 1, 3:1, 1:1, 1:3, 1:5, 1:10; finally, the graphene oxide material is placed in pure water to replace ethanol in the graphene oxide material with water. It was then freeze-dried and then soaked in 5% H 2 The samples were calcined at 800°C for 1 h in an Ar atmosphere, and finally the samples were placed in an ozone generator for ozone treatment for 15 m...

Embodiment 2

[0098] Disperse a certain amount of graphene oxide in ethanol to prepare a dispersion with a concentration of 0.5 mg / mL. Take out 70 mL of the dispersion, pour it into a 100 mL stainless steel reaction kettle with a Teflon lining, and react at 180° C. for 12 hours. Transfer the prepared graphene oxide material containing ethanol to an appropriate container, and then slowly replace the ethanol with water. Wherein the graphene oxide material is first placed in a series of mixed solutions of ethanol and water with multiple concentration gradients, wherein the ratio of ethanol and water in the series of mixed solutions is 10:1, 5: 1, 3:1, 1:1, 1:3, 1:5, 1:10; finally, the graphene oxide material is placed in pure water to replace ethanol in the graphene oxide material with water. It was then freeze-dried and then soaked in 5% H 2 The samples were calcined at 800°C for 1 h in an Ar atmosphere, and finally the samples were placed in an ozone generator for ozone treatment for 15 m...

Embodiment 3

[0102] Disperse a certain amount of graphene oxide in N,N-dimethylformamide to prepare a dispersion with a concentration of 1.0 mg / mL. Take out 70mL of the dispersion, pour it into a 100mL stainless steel reaction kettle with polytetrafluoroethylene lining, and react at 180°C for 24 hours. Transfer the prepared graphene oxide material filled with N,N-dimethylformamide to an appropriate container, and then slowly replace N,N-dimethylformamide with water. It was then freeze-dried and then soaked in 5% H 2 The samples were calcined at 1000°C for 0.5 h in an Ar atmosphere, and finally the samples were placed in an ozone generator for ozone treatment for 20 min. A graphene-based light-to-heat conversion material is obtained.

[0103]The material can be used to make light-to-heat conversion devices (such as seawater desalination and sewage treatment devices, etc.), a design prototype of this device is as Figure 6 shown. In order to make the sample can be used directly on the se...

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Abstract

The invention provides a preparation method of a graphene-based photothermal conversion material. The preparation method of the graphene-based photothermal conversion material comprises performing hydrothermal reaction, solvothermal reaction and mixed solvothermal reaction on a single-layer graphene oxide dispersion; removing water and organic solvent, and performing high-temperature calcination and ozone treatment to obtain the graphene-based photothermal conversion material. The invention also provides the graphene-based photothermal conversion material prepared through the method and application thereof. The graphene-based photothermal conversion material can be applied to various photothermal conversion devices.

Description

technical field [0001] This application is in the field of light conversion. Specifically, the present application relates to graphene-based light-to-heat conversion materials, preparation methods and applications thereof. Background technique [0002] Water is one of the most abundant chemical compounds on earth. About three-quarters of the world is covered with water, but 97% of the world's water is difficult to use directly in the ocean, resulting in a shortage of fresh water resources. With the development of economy and society, energy consumption is increasing day by day, and environmental pollution damages water resources, leading to an increasing shortage of fresh water resources on the earth. Scientists predict that by 2025, two-thirds of the world's population will face fresh water scarcity. my country has also been listed by the United Nations as one of the 13 water-deficient countries, which will seriously affect the implementation of the sustainable developme...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/184C02F1/14C02F1/10B01D1/00C02F103/08
CPCB01D1/0029B01D1/0035C01P2004/03C02F1/10C02F1/14C02F2103/08Y02A20/212
Inventor 陈永胜杨扬
Owner NANKAI UNIV
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