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A porous photothermal film with anti-salt precipitation performance and its preparation and application

A porous film and performance technology, applied in the field of solar desalination, can solve the problems of low light absorption efficiency, wide light absorption, and can only absorb ultraviolet light, etc., and achieve the effect of simple preparation process, strong operability, and easy popularization and application

Active Publication Date: 2021-09-07
SHANDONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the above invention can also be used as a photothermal film for seawater desalination, the light absorption efficiency is low. This is because TiO2 itself has a wide band gap and can only absorb ultraviolet light. Although adding WO3 can expand the absorption range of visible light, ultraviolet light and visible light cannot absorb light. Only about 50% of the entire solar spectrum
[0006] In the present invention, TiNx with plasmon resonance effect is used as the light absorber, and the corrosion-resistant Ti mesh with different apertures is used as the support body, and the hydrophobic film with hierarchical porous structure is obtained through hydrophobic modification, which is expected to broaden the range of light absorption and improve the light absorption rate at the same time. thermal conversion performance and stability, this hydrophobic TiN x Research on application of photothermal film to solar seawater desalination

Method used

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  • A porous photothermal film with anti-salt precipitation performance and its preparation and application
  • A porous photothermal film with anti-salt precipitation performance and its preparation and application
  • A porous photothermal film with anti-salt precipitation performance and its preparation and application

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Experimental program
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Effect test

Embodiment 1

[0038] Step 1: Base Treatment

[0039] Sonicate 100-mesh Ti mesh (4cm*4cm, can be cut as needed) in acetone, alcohol, and deionized water for 30 minutes to remove surface impurities.

[0040] The second step: TiO 2 / Ti porous membrane preparation

[0041] Put the Ti grid treated in the above steps into 10M NaOH solution, keep it warm at 120°C for 12h for hydrothermal synthesis reaction, then perform ion exchange in 1M HCl solution for 10min, and finally anneal at 500°C for 0.5h, the heating rate 2°C·min -1 , and finally obtain TiO 2 / Ti hierarchical hole structure photothermal film, micropore 150um, nanopore about 500-600nm.

[0042] The third step: TiN x / Ti porous membrane preparation

[0043] TiO prepared by the above steps 2 / Ti porous membrane was nitrided at 1000°C to obtain TiN x / Ti porous membrane. The processing time is 7h, the working gas is NH 3 , air flow 10ml·min -1 .

[0044] Step Four: Hydrophobic Modification

[0045] The TiN prepared by the above...

Embodiment 2

[0050] Step 1: Base Treatment

[0051] Sonicate the 50-mesh Ti mesh (4cm*4cm, can be cut as needed) in acetone, alcohol, and deionized water for 30 minutes to remove surface impurities.

[0052] The second step: TiO 2 / Ti porous membrane preparation

[0053] Put the Ti mesh treated in the above steps into 10M NaOH solution, keep it warm at 120°C for 2h for hydrothermal synthesis reaction, then perform ion exchange in 1M HCl solution for 10min, and finally anneal at 500°C for 0.5h, the heating rate 2°C·min -1 , and finally obtain TiO 2 / Ti hierarchical hole structure photothermal film, the micropore is 270um, and the nanopore is about 100-200nm.

[0054] The third step: TiN x / Ti porous membrane preparation

[0055] TiO prepared by the above steps 2 / Ti porous membrane was nitrided at 1000°C to obtain TiN x / Ti porous membrane. The processing time is 7h, the working gas is NH 3 , air flow 10ml·min -1 .

[0056] Step Four: Hydrophobic Modification

[0057] The TiN p...

Embodiment 3

[0061] Step 1: Base Treatment

[0062] Sonicate 200-mesh Ti mesh (4cm*4cm, can be cut as needed) in acetone, alcohol, and deionized water for 30 minutes to remove surface impurities.

[0063] The second step: TiO 2 / Ti porous membrane preparation

[0064] Put the Ti net treated in the above steps into 10M NaOH solution, keep it warm at 120°C for 6h for hydrothermal synthesis reaction, then conduct ion exchange in 1M HCl solution for 10min, and finally anneal at 500°C for 0.5h, the heating rate 2°C·min -1 , and finally obtain TiO 2 / Ti hierarchical hole structure photothermal film, the micropore is 75um, and the nanopore is about 200-300nm.

[0065] The third step: TiN x / Ti porous membrane preparation

[0066] TiO prepared by the above steps 2 / Ti porous membrane was nitrided at 800°C to obtain TiN x / Ti porous membrane. The processing time is 10h, the working gas is NH 3 , air flow 10ml·min -1 .

[0067] Step Four: Hydrophobic Modification

[0068] The TiN prepar...

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Abstract

The invention discloses a porous photothermal film with anti-salt precipitation performance and its preparation and application. It uses seawater corrosion-resistant metal Ti mesh with different apertures as the base material, and obtains different films by hydrothermal synthesis reaction and reaction time control. Pore ​​TiO 2 / Ti porous membrane, and then loaded TiN with plasmon resonance effect on the surface of titanium mesh by desalination reaction x , improve the light absorption rate, and then obtain hydrophobic TiN by hydrophobic modification x / Ti porous photothermal film to prevent the precipitation of salt in the process of seawater desalination. The present invention is to TiO 2 / Ti porous membrane adopts nitriding measures, and the TiN obtained after nitriding x Although the / Ti porous film has good light-absorbing properties, its hydrophobicity is poor, and it is difficult for TiN x / Ti porous membrane is hydrophobically modified, which improves the stability and prevents the precipitation of salt.

Description

technical field [0001] The invention relates to the field of solar seawater desalination, in particular to a porous photothermal film with anti-salt precipitation performance and its preparation and application. The porous photothermal film of the invention uses interface photothermal conversion technology to achieve high-efficiency light absorption and effectively prevent salt precipitation during water evaporation, improving the water evaporation efficiency and stability of the porous photothermal film. Background technique [0002] The depletion of drinking water resources and the deterioration of sanitation conditions are one of the serious challenges facing human beings around the world. With the deepening of the concept of green shared development, as an important supply reserve of "open source", desalination of seawater has become an important way to solve the global water resource crisis. However, conventional seawater desalination technology has limited its wide ap...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/14G02B5/00F24S70/10C02F103/08
CPCC02F1/043C02F1/14C02F2103/08F24S70/10G02B5/003Y02E10/40Y02A20/124Y02A20/142Y02A20/212
Inventor 魏娜崔洪芝林媛李振奎徐瑞祺孙金全
Owner SHANDONG UNIV OF SCI & TECH
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