Copper-based composite material, preparation method and application of copper-based composite material in field of photothermal conversion

A copper-based composite material and photothermal technology, which is applied in the components of solar collectors, solar thermal energy, solar thermal power generation, etc., can solve problems such as the difficulty of making breakthroughs and the photothermal conversion performance of a single photothermal material , to achieve the effect that the reaction process is easy to control, the preparation method is simple and convenient, and the yield is high

Active Publication Date: 2021-07-16
江苏健盛碳源碳中和研究院有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In recent years, there have been more and more studies on the preparation of photothermal materials and their application in the field of photothermal evaporation to produce clean water. However, the photothermal conversion performance of simple and single photothermal materials has certain limitations, and can only be used in certain A specific spectral range has a better photothermal conversion effect, so increasing the spectral range of photothermal materials has been difficult to achieve breakthroughs in improving photothermal conversion efficiency.

Method used

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  • Copper-based composite material, preparation method and application of copper-based composite material in field of photothermal conversion
  • Copper-based composite material, preparation method and application of copper-based composite material in field of photothermal conversion
  • Copper-based composite material, preparation method and application of copper-based composite material in field of photothermal conversion

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preparation example Construction

[0067] The present invention also provides a preparation method for the above-mentioned copper-based composite material, comprising the following steps:

[0068] Step (1): Preparation of nano-selenium spheres

[0069] A certain amount of selenium source and the second catalyst are dissolved in deionized water successively, which is recorded as solution 1. (i.e. the first solution);

[0070] Another certain amount of polyvinylpyrrolidone (PVP) was dissolved in deionized water, and recorded as solution ② (i.e. the second solution);

[0071] Add the solution ① to the solution ② gradually for reaction, and keep stirring at a speed below 800r / min for 10-40min (stirring is to make the reaction product more uniform, preferably the stirring speed is 400-800r / min, such as 400r / min , 500r / min, 600r / min, 700r / min, 800r / min), the reaction is carried out at room temperature (25°C), and after the reaction is completed, the product nano-selenium spheres obtained by washing and centrifuging ...

Embodiment 1

[0097] The copper-based composite material of the polydopamine modified copper selenide nano-ellipsoid of the present embodiment, the preparation method is specifically as follows:

[0098] (1) Preparation of nano-selenium spheres

[0099] 20 mg of selenous acid (H 2 SeO 3 ) and 180mg of ascorbic acid (AA) were successively dissolved in 5mL deionized water, which was recorded as solution ①;

[0100] Another 40 mg of polyvinylpyrrolidone (PVP) was dissolved in 5 mL of deionized water, and recorded as solution ②;

[0101] Add the solution ① gradually to the solution ②, and keep stirring for 10 minutes. The reaction is carried out at room temperature (25°C). 6min;

[0102] (2) Preparation of copper selenide nano-ellipsoid

[0103] Add the selenium bulb solution, polyvinylpyrrolidone solution, copper chloride solution, and ascorbic acid solution into the reaction vessel in sequence at a volume ratio of 1:1:1:1 to obtain a mixed solution with a volume of 4mL, and keep stirring...

Embodiment 2

[0123] The copper-based composite material of the polydopamine modified copper selenide nano-ellipsoid of the present embodiment, the preparation method is specifically as follows:

[0124] (1) Preparation of nano-selenium spheres

[0125] 30 mg of selenous acid (H 2 SeO 3 ) and 200mg of ascorbic acid (AA) were successively dissolved in 10mL deionized water, which was recorded as solution ①;

[0126] Another 50 mg of polyvinylpyrrolidone (PVP) was dissolved in 10 mL of deionized water, and recorded as solution ②;

[0127] Add the solution ① gradually to the solution ②, and keep stirring for 10 minutes. The reaction is carried out at room temperature (25°C). 6min;

[0128] (2) Preparation of copper selenide nano-ellipsoid

[0129] Add the selenium bulb solution, polyvinyl alcohol solution, copper acetate solution, and hydrazine solution into the reaction vessel in sequence at a volume ratio of 2:3:2:4 to obtain a mixed solution with a volume of 11mL, and keep stirring for ...

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Abstract

The invention belongs to the technical field of photo-thermal conversion, and particularly relates to a copper-based composite material, a preparation method and application of the copper-based composite material in the field of photo-thermal conversion. The copper-based composite material is a photo-thermal composite material formed by wrapping copper selenide nano ellipsoids with polydopamine, and the thickness of the polydopamine in the copper-based composite material is 5-80 nm. The copper selenide nano ellipsoid serves as a semiconductor material, has a surface plasma resonance effect, and can effectively absorb infrared light and convert light energy into heat energy under the condition of infrared laser irradiation, so that the temperature of the material is increased; the surface of the copper selenide nano ellipsoid is coated with the polydopamine, so that the copper-based composite material is black under the condition of natural light and can efficiently absorb light in the visible light and near-infrared light range, namely, the polydopamine can make up for low light absorption of the copper selenide nano ellipsoid in the visible light range. The composite material can reach a temperature higher than that of the copper selenide nano ellipsoid under the same condition, namely, the composite material has higher photothermal conversion efficiency.

Description

technical field [0001] The invention belongs to the technical field of photothermal conversion, and in particular relates to a copper-based composite material, a preparation method and its application in the field of photothermal conversion, for example, it can be used for solar heat collection tubes, photothermal evaporation to produce clean water, and the like. Background technique [0002] Reverse osmosis is one of the most mature technologies in seawater desalination technology. The normal operation of the reverse osmosis seawater desalination device needs to prevent scaling and prevent organic matter and biological pollution, so effective pretreatment methods must be adopted. Photothermal conversion water evaporation technology is one of the important means to quickly heat and evaporate water and collect clean water to achieve the purpose of seawater desalination. Theoretically, photothermal materials can capture light energy, use its unique bandgap width to absorb sun...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L79/04C08K7/00C08K3/30C08G73/06F24S70/12
CPCC08K7/00C08K3/30C08G73/0672F24S70/12C08K2201/011C08L79/04Y02A20/142Y02E10/40Y02A20/124Y02A20/131Y02A20/212
Inventor 程浩艳胡浩宋克兴夏婉婷
Owner 江苏健盛碳源碳中和研究院有限公司
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