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Application of a photothermal conversion copper sulfide composite film in water treatment

A light-to-heat conversion and composite thin-film technology, applied in the field of water treatment, can solve the problems of high energy loss and equipment maintenance costs, and achieve the effect of realizing the effective use of energy, improving efficiency and solving low evaporation efficiency.

Active Publication Date: 2020-07-24
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the current research in this direction is mostly focused on optimizing the device system and adding equipment to increase evaporation efficiency, which are accompanied by higher energy loss and equipment maintenance costs.

Method used

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  • Application of a photothermal conversion copper sulfide composite film in water treatment
  • Application of a photothermal conversion copper sulfide composite film in water treatment
  • Application of a photothermal conversion copper sulfide composite film in water treatment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] In this example, the light-to-heat conversion copper sulfide composite film was prepared according to the following method and its light-to-heat conversion efficiency was verified:

[0034] a. Pretreatment of porous polyethylene film

[0035] First, a layer of copper element is sprayed on the surface of a black spongy porous polyethylene film with a thickness of about 153 microns by magnetron sputtering to obtain a PE-Cu film; the quality of the sprayed copper element accounts for 1.46% of the mass of the porous polyethylene film .

[0036] Then put the PE-Cu film into hot water at 50°C for cleaning, take it out, wash it with absolute ethanol and ultrapure water several times in turn, and dry it at 30°C for 12 hours for later use.

[0037] b. Transformation of simple copper on PE-Cu film

[0038] Weigh 0.0369g of thiourea (Tu) and 0.4781g of polyvinylpyrrolidone (PVP), add them into 35mL of ethylene glycol and ultrasonically dissolve them for 20min, then transfer them...

Embodiment 2

[0048] Present embodiment adopts the PE-Cu that embodiment 1 makes 2-x The S film was used for water treatment simulation experiments, as follows:

[0049] a. Take a piece of circular PE-Cu with a diameter of 4 cm 2-x The S film was washed several times with absolute ethanol and ultrapure water, and dried at 30°C for 12 hours for later use.

[0050] b. Fill a cylindrical beaker with a diameter of 4 cm with ultrapure water and place it on an electronic balance. Place the device under the illumination of a halogen lamp with an energy of 275W. The surface of the ultrapure water is 17 cm away from the halogen lamp, and the light source is irradiated vertically on the surface of the water body. The irradiation time was 14 minutes, and the mass change of the device due to the evaporation of ultrapure water during the irradiation process was recorded at the same time.

[0051] c. Fill a cylindrical beaker with a diameter of 4 cm with ultrapure water, place it on an electronic bala...

Embodiment 3

[0054] In this embodiment, the light source in Embodiment 2 is changed to a power density of about 1000W m -2 The same water treatment simulation experiment was carried out with simulated sunlight, and the irradiation time was 30 minutes.

[0055] The results showed that after 30 minutes of irradiation, the uncovered PE-Cu 2-x The pure water mass of the S film decreased by 0.23g, and the evaporation rate was 0.366kg m -2 h -1 . And the surface is covered with PE-Cu 2-x After the pure water of the S film is irradiated under simulated sunlight for 30 minutes, the mass of pure water decreases by 0.52g, and the evaporation rate is 0.828kg m -2 h -1 , indicating PE-Cu 2-x The S film can produce a photothermal effect under simulated sunlight irradiation, which can increase the temperature of the water surface and improve the efficiency of evaporating water.

[0056] The conversion efficiency of the heat required for water evaporation by solar energy is calculated by formula η...

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Abstract

The inventiondiscloses an application of a photothermal-conversion cupric sulfidecomposite film in water treatment. The photothermal-conversion cupric sulfidecomposite film is applied to sea water desalination or sewage treatment and is characterized in that defective type cupric sulfide nanoparticles capable of performing solar photothermal conversion grow on the surface of a black spongy porouspolyethylene film. The composite film is used for manufacturing a device by combining an independent hydrophilic film and a photothermal-conversion material, has a porous surface, is highly hydrophilic and can float on the surface of water, and therefore, under cooperation with the solar photothermal conversion performance of the cupric sulfide nanoparticles on the surface of the film, the composite film can be applied to the evaporation process of water in the nature, greatly improves solar evaporation efficiency of water, can be widely applied to the sewage treatment, the sea water desalination, water circulation and the like and facilitates realization of effective energy utilization and environmental protection.

Description

technical field [0001] The invention relates to the application of a light-to-heat conversion film, which belongs to the field of water treatment. Background technique [0002] With the continuous advancement of science and technology in the new era, energy and environmental issues have become one of the prominent issues facing the world, especially the shortage of water resources has attracted more and more attention from human beings. [0003] The total water storage in the earth is about 1386×1 billion cubic meters, of which ocean water accounts for 96.5%, and fresh water resources only account for 3.5%. Fresh water mainly exists in the form of glaciers and deep groundwater. The fresh water directly available to human beings such as rivers and lakes only accounts for 0.3% of the world's total fresh water. Therefore, water shortage has become the primary problem facing cities all over the world. At present, people are beginning to desalinate seawater by means of reverse o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/04C02F1/14C08J7/06F24S70/20C02F103/08C08L23/06
CPCC02F1/048C02F1/14C02F1/30C02F2103/08C02F2201/009C08J7/06C08J2323/06Y02W10/37Y02A20/124Y02A20/142Y02A20/212
Inventor 王振洋张淑东张忠平赵婷婷李年
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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