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Sea water desalination method based on photothermal effect of copper nanoparticles

A technology of copper nanoparticles and photothermal effect, applied in chemical instruments and methods, seawater treatment, general water supply saving, etc., can solve the problems of low efficiency, slow heat absorption of seawater, etc., and achieve the effect of realizing conversion and improving utilization rate

Active Publication Date: 2018-10-30
苏州昆道新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, seawater is only desalinated by the sun’s irradiation. Since seawater absorbs heat slowly and converts a very small amount into fresh water, and the water vapor in the atmosphere only accounts for 13,000 cubic kilometers (about 0.001%) at any known time, this simple utilization Solar desalination is inefficient

Method used

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  • Sea water desalination method based on photothermal effect of copper nanoparticles
  • Sea water desalination method based on photothermal effect of copper nanoparticles
  • Sea water desalination method based on photothermal effect of copper nanoparticles

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] In this example, copper nanoparticles and a polypropylene film uniformly covered with copper nanoparticles were prepared as follows; and the photothermal effect of copper nanoparticles was verified.

[0034] 1. Preparation of copper nanoparticles

[0035](1) Cut the zinc flakes with a thickness of 200 μm and a purity of 99.99% into discs with a diameter of 15 mm, and put them into 2.5% sulfuric acid, isopropanol, and acetone for ultrasonic treatment for 30 seconds, 5 minutes, and 5 minutes; The wafers were washed in isopropanol and water successively, and then dried in air for later use;

[0036] (2) Weigh 0.2g of copper sulfate and add it to 50ml of distilled water until the solid is completely dissolved to form solution A; put the above-mentioned treated zinc disc into solution A for 30s, and the surface of the zinc disc is covered with a layer of copper nanoparticles; Put the zinc disc containing copper nanoparticles into distilled water to quench the replacement re...

Embodiment 2

[0047] This example demonstrates the efficiency of cellulose membranes containing copper nanoparticles for evaporating distilled water.

[0048] The copper nanoparticle polypropylene film covered with copper nanoparticles on the surface prepared in Example 1 is subjected to a simulation experiment of distilled water evaporation treatment, and the experimental method is as follows:

[0049] a. Take a circular polypropylene film with a diameter of 15 mm and the surface covered with 30 mg of copper nanoparticles, wash it several times with absolute ethanol and distilled water, and dry it in a vacuum drying oven at 40 ° C for 12 hours for later use;

[0050] b. Use Figure 8 The shown device is used for water evaporation experiments. A cylindrical beaker 2 with a volume of 30 ml is filled with distilled water, and the cellulose film 3 covered with copper nanoparticles obtained in step a is placed on the surface of the distilled water, and the device is placed on a current of 20A. ...

Embodiment 3

[0057] This example demonstrates the efficiency of a cellulose film containing copper nanoparticles for evaporating seawater.

[0058] Prepare salt water with a salt concentration of 3.75% to simulate seawater, and perform seawater evaporation treatment simulation experiments with reference to steps a and b in Example 2; the difference is that the cylindrical beaker 2 is filled with salt water with a salt concentration of 3.75%. The fresh water obtained after evaporation and condensation is collected in container 1.

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Abstract

The invention provides a sea water desalination method based on the photothermal effect of copper nanoparticles. The method includes the steps: covering a cellulose membrane with the copper nanoparticles; placing the cellulose membrane with the surface covered with the copper nanoparticles into a sea water surface to be desalinated; irradiating the surface of the cellulose membrane by a light source; evaporating sea water; collecting the evaporated water; desalinating the sea water. The copper nanoparticles can nearly completely and all-dimensionally absorb sunlight in a wideband manner, solarenergy is efficiently converted into heat energy, the cellulose membrane with a porous surface is highly hydrophilic, can float on the water surface, accelerates water pumping water delivery and cooperates with the photothermal effect of the copper nanoparticles, so that the cellulose membrane can be applied to the evaporation process of the sea water in nature, solar energy use ratio and water evaporation efficiency are greatly increased, the method can be widely applied to sea water desalination, the energy can be effectively used, and environments can be protected.

Description

technical field [0001] The invention relates to a seawater desalination method, in particular to a seawater desalination method based on the photothermal effect of copper nanoparticles, and belongs to the fields of solar energy utilization and seawater desalination treatment. Background technique [0002] The volume of water on the earth is about 136 million cubic kilometers, oceans account for 132 million cubic kilometers (about 97.2%); glaciers and ice sheets account for 25 million cubic kilometers (about 1.8%); groundwater accounts for 13 million cubic kilometers (about 0.9%); fresh water in lakes, inland seas, and rivers accounts for 250,000 cubic kilometers (about 0.02%); atmospheric water vapor accounts for 13,000 cubic kilometers (about 0.001%) at any given time, and That is to say, the water source that can really be utilized is less than 0.1%. Fresh water resources on land only account for about 2.53% of the total water bodies on the earth, and nearly 70% of them a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/14C02F1/44C02F103/08
CPCC02F1/14C02F1/447C02F2103/08Y02A20/131Y02A20/142Y02A20/212Y02A20/124
Inventor 甘志星林雅雯
Owner 苏州昆道新材料科技有限公司
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