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Photothermal conversion film, preparation method thereof and double-layer evaporation structure for solar steam generation

A light-to-heat conversion, thin-film technology, applied in solar thermal power generation, components of solar collectors, solar thermal energy, etc., can solve problems such as the reduction of input energy, reduce heat conduction loss, good interface connection, and improve the performance of solar steam. produced effect

Active Publication Date: 2020-01-24
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the biggest problem with this design is that it may limit the optical loss of incident sunlight, resulting in a reduction in input energy
Therefore, how to convert solar radiation into heat and utilize it is still a huge challenge.

Method used

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  • Photothermal conversion film, preparation method thereof and double-layer evaporation structure for solar steam generation
  • Photothermal conversion film, preparation method thereof and double-layer evaporation structure for solar steam generation
  • Photothermal conversion film, preparation method thereof and double-layer evaporation structure for solar steam generation

Examples

Experimental program
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Effect test

preparation example Construction

[0032] 1. Preparation of CuO / Ag@CF composite film

[0033] 1. Cleaning treatment of copper foam (CF)

[0034] Select commercial copper foam, put the foam copper into dilute hydrochloric acid with a mass fraction of 3%, and ultrasonically clean it with a power of 50-70W for 5-10 minutes, take out the foam copper and rinse it with deionized water until it is clean. Then use the same method to ultrasonically clean them in absolute ethanol and deionized water for 5-10 min, respectively. Thereby removing impurities, oxides / hydroxides, grease, etc. on the surface of copper foam. After taking it out, a clean copper foam is obtained.

[0035] 2. Preparation of Cu(OH) 2 film

[0036] Preparation of NaOH and (Na) 2 S 2 o 8 The mixed solution was stirred with a magnetic stirrer until homogeneous. Then the copper foam was vertically immersed in the beaker wall of the mixed solution. After standing for 5 hours at room temperature, a layer of light blue film covered the surface of ...

Embodiment 1

[0053] 1. Preparation of CuO / Ag@CF light-to-heat conversion film

[0054] 1. Cleaning treatment of copper foam

[0055] Select commercial copper foam (22 mm in diameter) with a thickness of 1.5 mm and 1.0 mm respectively, place the copper foam in dilute hydrochloric acid with a mass fraction of 3%, and ultrasonically clean it at a power of 50 W for 10 minutes, then take out the copper foam and rinse it with deionized water until clean. Then use the same method to ultrasonically clean them in absolute ethanol and deionized water for 10 min, respectively. Thereby removing impurities, oxides / hydroxides, grease, etc. on the surface of copper foam. After taking it out, a clean copper foam is obtained.

[0056] 2. Preparation of Cu(OH) 2 film

[0057] Prepare 25mL of 1.0mol L -1 NaOH solution and 25 mL of 0.05 mol L-1(Na) 2 S 2 o 8 solution, the two solutions were mixed and stirred with a magnetic stirrer until homogeneous. Then the copper foam was vertically immersed in t...

Embodiment 2

[0066] 1. Preparation of CuO / Ag@CF light-to-heat conversion film

[0067] 1. Cleaning treatment of copper foam

[0068] Select commercial copper foam (22mm in diameter) with a thickness of 1.5mm and 1.0mm, put the copper foam into dilute hydrochloric acid with a mass fraction of 3%, and ultrasonically clean it with a power of 60W for 10 minutes, take out the copper foam and rinse it with deionized water until it is clean . Then use the same method to ultrasonically clean them in absolute ethanol and deionized water for 10 min, respectively. Thereby removing impurities, oxides / hydroxides, grease, etc. on the surface of copper foam. After taking it out, a clean copper foam is obtained.

[0069] 2. Preparation of Cu(OH) 2 film

[0070] Prepare 25mL of 0.8mol L -1 NaOH solution and 25mL of 0.03mol L -1 (Na) 2 S 2 o 8 solution, the two solutions were mixed and stirred with a magnetic stirrer until homogeneous. Then the copper foam was vertically immersed in the beaker wa...

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Abstract

The invention provides a high-performance foam metal-based photothermal conversion film, a preparation method thereof and a double-layer evaporation structure for solar steam generation. The high-performance foam metal-based photothermal conversion film is a CuO@CF or CuO / Ag@CF photothermal conversion film, the CuO@CF or CuO / Ag@CF photothermal conversion film and melamine foam form the double-layer evaporation structure for solar steam generation, then downward conduction heat loss from a solar absorber to underlying water occurring in a single layer evaporation system is reduced, and evaporation efficiency is further improved; and compared with a traditional pure noble metal material film, the CuO / Ag@CF photothermal conversion film has lower cost.

Description

technical field [0001] The invention relates to the field of photothermal materials, in particular to a high-performance foam metal-based photothermal conversion film, a preparation method thereof, and a double-layer evaporation structure used for solar steam generation. Background technique [0002] As the key to efficient light-to-heat conversion, photothermal materials are also the core of solar steam technology. The heat generated by photothermal materials can be used to drive steam generation, which has attracted extensive and intensive research due to its great potential for cost-effective and environmentally friendly water purification. [0003] Current technologies for producing steam using solar energy rely on the absorption of solar radiation by the surface of the material and the transfer of the accumulated heat to bulk water directly or indirectly through an intermediate heat transfer fluid due to high light loss, high surface heat loss, or the need for a vacuum ...

Claims

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Application Information

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IPC IPC(8): F24S70/10C23C22/63C23C22/82C23C14/18C23C14/24C23C28/00
CPCC23C14/18C23C14/24C23C22/63C23C22/82C23C28/30C23C28/322C23C28/345F24S70/10Y02E10/40
Inventor 王成兵许珂圆李政通王九龙
Owner SHAANXI UNIV OF SCI & TECH
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