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Preparation method of photothermal conversion porous structure and solar evaporation device

A porous structure and light-to-heat conversion technology, applied in solar thermal power generation, solar thermal energy, solar collectors, etc., can solve the problems that restrict the promotion and application of solar interface evaporation technology, high cost of photothermal materials, and limited evaporation efficiency. Achieve the effects of low preparation cost, improved evaporation performance, and improved evaporation capacity

Pending Publication Date: 2021-12-31
SHANGHAI INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the evaporation of solar energy interfaces is mainly concentrated on various self-floating light-absorbing materials, but there is also a certain level of reflection when sunlight is incident on the interface, and the evaporation efficiency is limited to a certain extent due to the limited evaporation interface area.
[0004] Existing photothermal materials have high cost, complex preparation methods and low efficiency, which directly restrict the promotion and application of solar interface evaporation technology

Method used

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  • Preparation method of photothermal conversion porous structure and solar evaporation device
  • Preparation method of photothermal conversion porous structure and solar evaporation device
  • Preparation method of photothermal conversion porous structure and solar evaporation device

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Experimental program
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Effect test

Embodiment 1

[0039] The core of the present invention is to provide a method for preparing a light-to-heat conversion porous structure, including copper foam and graphene oxide, using the following steps:

[0040] S1: Configure NaOH and (NH 4 ) 2 S 2 o 8 Alkaline mixed solution, NaOH and (NH 4 ) 2 S 2 o 8 Add to different beakers and fully dissolve with distilled water, then mix and stir until uniform. And the molar concentration ratio of NaOH and (NH4)2S2O8 in the alkaline mixed solution of NaOH and (NH4)2S2O8 is 25:1.

[0041] S2: Clean the copper foam sequentially with acetone, alcohol, distilled water, hydrochloric acid solution and distilled water ultrasonically for 5-10 minutes, and dry it with nitrogen after cleaning to remove organic matter, impurities, oxides and hydroxides on the surface of the copper foam . Wherein the concentration of the hydrochloric acid solution is 2wt%-5wt%.

[0042] S3: Immerse foam copper in NaOH and (NH 4 ) 2 S 2 o 8 Alkaline mixed solution...

Embodiment 2

[0047] Another core of the present invention is to provide a solar evaporation device, including the CuO / GO composite light-to-heat conversion structure 2 prepared by the preparation method of the light-to-heat conversion porous structure in Example 1, and also includes a heat-insulating container 1, a heat-insulating layer 4 and water transfer layer 3.

[0048] Water 5 is stored at the bottom of the heat-insulated container 1, and its top is open. Preferably, the thermally insulated container 1 is a plastic container with low thermal conductivity.

[0049] The heat insulation layer 4 is arranged in the heat insulation container 1 and is located above the water 5. The material of the heat insulation layer 4 is porous plastic foam, which can effectively reduce the heat transfer loss from top to bottom.

[0050] The water transfer layer 3 is arranged in the heat insulation container 1 and is located above the heat insulation layer 4. Both sides of the water transfer layer 3 exten...

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Abstract

The invention discloses a preparation method of a photo-thermal conversion porous structure and a solar evaporation device. The preparation method comprises foamy copper and graphene oxide, and comprises the following steps that S1, a NaOH and (NH4)2S2O8 alkaline mixed solution is prepared; s2, the foamy copper is subjected to ultrasonic cleaning with acetone, alcohol, distilled water, a hydrochloric acid solution and distilled water in sequence, and after cleaning is completed, the foamy copper is blow-dried with nitrogen; s3, the foamy copper is immersed in the NaOH and (NH4) 2S2O8 alkaline mixed solution, then constant-temperature oxidation is conducted, the oxidized foamy copper is washed with distilled water and dried, and a super-hydrophilic nano CuO structure is formed on the surface of the foamy copper; s4, the graphene oxide is dispersed in distilled water in an ultrasonic manner to obtain a GO solution; s5, the foamy copper is immersed in the GO solution, so that the graphene oxide is deposited on the surface of the foamy copper, then constant-temperature drying is conducted, and the CuO / GO composite photothermal conversion structure is obtained. The preparation method is simple, efficient, free of complex equipment and low in cost.

Description

technical field [0001] The invention belongs to the technical field of photothermal materials, and in particular relates to a method for preparing a photothermal conversion porous structure and a solar evaporation device. Background technique [0002] Solar thermal technology is the most direct way to obtain and utilize solar energy. Solar-driven water interface evaporation is one of the applications of solar thermal technology, which has a good application prospect because it fully utilizes solar energy without requiring additional energy input. [0003] At present, solar-driven water interface evaporation mainly relies on photothermal materials to absorb solar radiation energy and transfer heat directly or indirectly to the fluid, but the loss is large during the process of solar radiation energy absorption and heat transfer, which increases the The cost of the system limits the application and promotion of solar water evaporation technology. Nanostructured porous photot...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G3/02C01B32/198B82Y40/00B82Y30/00C02F1/14B05D7/14B05D7/24F24S70/10
CPCC01G3/02C01B32/198B82Y40/00B82Y30/00C02F1/14B05D7/14B05D7/24F24S70/10C01P2004/80C01P2004/03B05D2202/45Y02E10/40Y02A20/212
Inventor 程道来聂寒璐吕凤勇林思帆
Owner SHANGHAI INST OF TECH