Broadband absorber and preparation method thereof

An absorber and broadband technology, which is applied in the field of photothermal material preparation, can solve the problems of high price, difficulty in wide application, and non-environmental protection, and achieve excellent photothermal conversion efficiency, high photothermal conversion efficiency, and reduce production costs.

Inactive Publication Date: 2021-08-13
NAT UNIV OF DEFENSE TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the material is expensive, and it is difficult to achieve wide application; at the same time, the working frequency band is in the visible light, and it is difficult to use the infrared light of sunlight
[0006] Although carbon-based materials represented by two-dimensional carbon materials can effectively absorb infrared light and reduce costs compared with noble metals, the preparation process requires strong oxidants to participate in the reaction, which is not environmentally friendly and the preparation process is complicated.

Method used

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  • Broadband absorber and preparation method thereof
  • Broadband absorber and preparation method thereof
  • Broadband absorber and preparation method thereof

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preparation example Construction

[0037] The first aspect of the present invention provides a method for preparing a broadband absorber, the broadband absorber is used for broadband absorption from the visible light band to the middle and far infrared band. figure 1 It is a flowchart of a preparation method of a broadband absorber according to an embodiment of the present invention, such as figure 1 As shown, the method specifically includes: step S1, using five cleaning powder and deionized water to ultrasonically clean and dry the reaction lining, the reaction lining is a hydrothermal reaction kettle lining; step S2, using copper nitrate , cobalt nitrate hexahydrate, nickel nitrate, urea, and multi-walled carbon nanotubes are raw materials, and water is used as a solvent to prepare Cu 0.48 Ni 0.16 co 2.36 o 4 / CuO-MWCNT thorn ball suspension, wherein MWCNT is a multi-walled carbon nanotube; step S3, standing the Cu 0.48 Ni 0.16co 2.36 o 4 / CuO-MWCNT spiked ball suspension to obtain Cu after removing t...

Embodiment 1

[0044] Embodiment one: Cu 0.48 Ni 0.16 co 2.36 o 4 / CuO-MWCNT spine ball preparation method.

[0045] Weigh 0.18 g of Cu(NO 3 ) 2 , 0.16 g Ni(NO 3 ) 2 , 0.33 g Co(NO 3 ) 2 ·6H 2 O, 0.12 g of urea, and 0.017 g of multi-walled carbon nanotubes (MWCNT) were dispersed in 40 ml of deionized water, and stirred at a rate of 370 rpm for 10 minutes on a magnetic stirrer.

[0046] The obtained solution was transferred to a hydrothermal reaction kettle, and the reaction kettle was placed in an oven to be heated, and the temperature of the oven was set to 120 degrees Celsius, and the time was set to 15 hours.

[0047] After the oven is cooled, the suspension obtained by the hydrothermal treatment is left to settle and the supernatant is removed, and then fully washed with deionized water for 3 times.

[0048] Finally, the resulting precipitate was dried in a vacuum drying oven at a drying temperature of 70 degrees Celsius and a drying time of 12 hours to obtain a composite Cu ...

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Abstract

The invention provides a broadband absorber and a preparation method thereof. The method comprises the following steps: carrying out ultrasonic cleaning and drying treatment on a reaction lining by utilizing Wuqing powder and deionized water, wherein the reaction lining is a hydrothermal reaction kettle lining; preparing a Cu0.48Ni0.16Co2.36O4 / CuO-MWCNT acanthosphere turbid liquid by taking copper nitrate, cobalt nitrate hexahydrate, nickel nitrate, urea and a multi-walled carbon nanotube as raw materials and water as a solvent and utilizing the reaction lining subjected to ultrasonic cleaning and drying treatment through a hydrothermal reaction; standing the acanthosphere turbid liquid to obtain acanthosphere precipitates after the supernate is removed; and repeatedly cleaning the acanthosphere precipitate by using the deionized water, and drying the acanthosphere precipitate in a vacuum drying oven to obtain acanthosphere powder as the broadband absorber.

Description

technical field [0001] The invention relates to the field of photothermal material preparation, in particular to a broadband absorber and a preparation method thereof. Background technique [0002] Today, the world is facing problems such as environmental pollution and energy shortages. Therefore, low-cost, efficient development and utilization of environmentally friendly new energy sources have become an urgent need. [0003] Solar energy is inexhaustible for human beings. Solar energy has been used in many industries such as seawater desalination, heating and power supply, and is an ideal energy source to replace traditional fossil fuels. Photothermal conversion materials can efficiently convert solar energy into thermal energy, and then use other forms of energy for human use. Therefore, the preparation and utilization of high-efficiency photothermal conversion materials have become an important way to effectively utilize solar energy. [0004] At present, some progress ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G53/00C01G3/02C01B32/168F24S70/10C02F1/14
CPCC01G3/02C01G53/006C01P2002/72C01P2004/03C01P2004/30C01P2004/32C01P2004/80C02F1/14C01B32/168F24S70/10Y02E10/40Y02A20/212
Inventor 李晓霞张敬岩王晓农朱斌陈熠解博朱耀轩
Owner NAT UNIV OF DEFENSE TECH
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