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Photothermal conversion material for seawater desalination and preparation method thereof

A photothermal conversion material and photothermal technology, applied in chemical instruments and methods, seawater treatment, general water supply conservation, etc., can solve the problems of expensive, difficult to large-scale application, scarce price of precious metal materials, etc., to reduce heat loss, The effect of avoiding deposition and improving light-to-heat conversion efficiency

Active Publication Date: 2022-03-01
JIANGSU UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] At present, there are many types of materials used for solar photothermal evaporation: carbon-based materials, noble metal materials, semiconductor materials, etc., although noble metals and semiconductor materials have higher heat conversion efficiency, but due to the scarcity and high price of precious metal materials, it is difficult to apply on a large scale. At the same time, the combination of the evaporation interface of precious metals and semiconductor photothermal evaporation materials and water-conducting materials is also a complicated process, and carbon-based materials are due to their low cost. , richness, excellent light absorption ability and other advantages, so that it has good development prospects and application space

Method used

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  • Photothermal conversion material for seawater desalination and preparation method thereof
  • Photothermal conversion material for seawater desalination and preparation method thereof
  • Photothermal conversion material for seawater desalination and preparation method thereof

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Effect test

Embodiment 1

[0029] The preparation method of the salt-deposition-proof light-to-heat conversion material of the present invention comprises the following steps:

[0030] (1) At 25°C, 2mmol cobalt nitrate hexahydrate Co(NO 3 ) 2 ·6H 2 O was dissolved in 40mL deionized water, and ultrasonicated for 3 to 5 minutes to obtain a solution with a cobalt nitrate concentration of 0.05mol / L, which was designated as solution A;

[0031] (2) Dissolve 16mmol of dimethylimidazole in 40mL of deionized water, and sonicate for 3 to 5 minutes to obtain a solution with a concentration of dimethylimidazole of 0.4mol / L, which is designated as solution B;

[0032] (3) Under magnetic stirring, solution A was slowly added dropwise into solution B to obtain a purple solution;

[0033] (4) Centrifuge and wash the product obtained in step (3) three times with water, remove the supernatant, take the precipitate, and dry it overnight at 50°C to obtain a purple powder-ZIF-L;

[0034] (5) Dissolve 50 mg of the powde...

Embodiment 2

[0046] The preparation method of the salt-deposition-proof light-to-heat conversion material of the present invention comprises the following steps:

[0047] (1) At 25°C, 2mmol cobalt nitrate hexahydrate Co(NO 3 ) 2 ·6H 2 O was dissolved in 40mL deionized water, and ultrasonicated for 3 to 5 minutes to obtain a solution with a cobalt nitrate concentration of 0.05mol / L, which was designated as solution A;

[0048] (2) Dissolve 16mmol of dimethylimidazole in 40mL of deionized water, and sonicate for 3 to 5 minutes to obtain a solution with a concentration of dimethylimidazole of 0.4mol / L, which is designated as solution B;

[0049] (3) Under magnetic stirring, solution A was slowly added dropwise into solution B to obtain a purple solution;

[0050] (4) Centrifuge and wash the product obtained in step (3) three times with water, remove the supernatant, take the precipitate, and dry it overnight at 50°C to obtain a purple powder-ZIF-L;

[0051] (5) Dissolve 30 mg of the powde...

Embodiment 3

[0057] The preparation method of the salt-deposition-proof light-to-heat conversion material of the present invention comprises the following steps:

[0058] (1) At 25°C, 2mmol cobalt nitrate hexahydrate Co(NO 3 ) 2 ·6H 2 O was dissolved in 40mL deionized water, and ultrasonicated for 3 to 5 minutes to obtain a solution with a cobalt nitrate concentration of 0.05mol / L, which was designated as solution A;

[0059] (2) Dissolve 16mmol of dimethylimidazole in 40mL of deionized water, and sonicate for 3 to 5 minutes to obtain a solution with a concentration of dimethylimidazole of 0.4mol / L, which is designated as solution B;

[0060] (3) Under magnetic stirring, solution A was slowly added dropwise into solution B to obtain a purple solution;

[0061] (4) Centrifuge and wash the product obtained in step (3) three times with water, remove the supernatant, take the precipitate, and dry it overnight at 50°C to obtain a purple powder-ZIF-L;

[0062] (5) Dissolve 10 mg of the powde...

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Abstract

The invention discloses a photo-thermal conversion material for seawater desalination. The photo-thermal conversion material comprises a water guide layer and a photo-thermal evaporation film, wherein the surface of the water guide layer is coated with the photo-thermal evaporation film in a spinning manner; the water guide layer is melamine sponge, and the photo-thermal evaporation film is a PDA / sodium alginate film based on ZIF-L. The invention also discloses a preparation method of the photothermal conversion material for seawater desalination, and the preparation method specifically comprises the following steps: inducing dopamine in-situ polymerization to form polydopamine by using ZIF-L to obtain ZIF-L / PDA, and mixing the obtained ZIF-L / PDA with sodium alginate to obtain sol; and spin-coating the sol on the surface of melamine sponge to form a film, and drying to obtain the photothermal conversion material. The photo-thermal evaporation film formed by modifying the sodium alginate has wide spectrum absorption and photo-thermal conversion capacity in the whole solar spectrum on one hand, has desalting capacity on the other hand, can effectively avoid deposition of salt on the surface in the interface evaporation process, has stable evaporation performance, and can be applied to the field of solar power generation. And the light absorption and photothermal conversion processes are not influenced.

Description

technical field [0001] The invention relates to a light-to-heat conversion material used for seawater desalination, and also relates to a preparation method of the light-to-heat conversion material. Background technique [0002] Since the 21st century, with the rapid development of the world economy and the acceleration of industrialization, energy shortage and environmental degradation have become major challenges facing the world, especially in some economically backward areas, where fresh water resources are extremely scarce. In recent years, materials and devices applied to interface evaporation have attracted great attention from researchers in the fields of seawater desalination, power generation, carbon dioxide capture, heavy metal recovery, steam sterilization, and oil-water separation due to their excellent light-to-heat conversion efficiency and heat utilization efficiency. big interest. Compared with traditional seawater desalination technology, the only driving ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J9/36C08L61/28C02F1/04C02F1/14C02F103/08
CPCC08J9/365C02F1/14C02F1/04C02F1/043C02F2103/08C08J2361/28Y02A20/124Y02A20/142Y02A20/212
Inventor 卞婷左林致于涛王浩权程龙车依庭
Owner JIANGSU UNIV OF SCI & TECH