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Three-dimensional photothermal conversion material, device and method capable of efficiently treating saline water and wastewater

A photothermal conversion material and photothermal conversion technology, applied in chemical instruments and methods, seawater treatment, water/sewage treatment, etc., can solve the problem of not meeting the basic requirements of sustainable development, a large amount of energy input, and no consideration of high-concentration brine Desalination treatment and other problems, to achieve the effect of excellent water dispersion performance, efficient evaporation, continuous and efficient evaporation

Active Publication Date: 2021-06-04
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the synthesis process of this photothermal conversion material requires a large amount of energy input, which does not meet the basic requirements of sustainable development, and does not consider the desalination treatment of high-concentration brine

Method used

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  • Three-dimensional photothermal conversion material, device and method capable of efficiently treating saline water and wastewater
  • Three-dimensional photothermal conversion material, device and method capable of efficiently treating saline water and wastewater
  • Three-dimensional photothermal conversion material, device and method capable of efficiently treating saline water and wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] In this example, the light-to-heat conversion efficiency of the three-dimensional light-to-heat conversion material is evaluated, as follows:

[0065] 1) A certain volume of water is added to the water storage device, and a thermal insulator (polystyrene foam), a water-absorbing layer (non-woven fabric) and a three-dimensional light-to-heat conversion material are sequentially placed on it, which is the evaluation of the light-to-heat conversion efficiency used. Simulator.

[0066] 2) Simulation device for evaluating photothermal conversion efficiency by simulating the vertical irradiation of sunlight, through the online quality detection system, recording the change of quality over time, collecting data to calculate the photothermal evaporation rate per unit area, normalizing the input value of light energy, and calculating Light-to-heat conversion efficiency. The specific process is as follows:

[0067] ① Under the condition of no light irradiation, carry out a bala...

Embodiment 2

[0073] Step 1: Adjust the pH of 19.5 mL of 7.7 mg / mL graphene oxide solution to 12 to obtain solution A. Polyethyleneimine was used to prepare a polymer electrolyte solution with a concentration of 15 mg / mL to obtain solution B.

[0074] Add solution B dropwise to solution A, so that the ratio of graphene oxide to polymer electrolyte (abbreviated as GO: POLYMER) = 3:1 ~ 3:12, the remaining volume is made up with distilled water, shake vigorously or ultrasonically It is fully mixed to obtain a charged graphene oxide composite solution.

[0075] Step 2: Cut the block melamine foam into a 4cm×4cm×1cm cuboid (example), dip it in water and ethanol for several times, and then put it in a 60-degree oven to dry overnight. Get a clean and dry lather.

[0076] Step 3: Weigh the quality of clean and dry foam, select foam with similar quality, and immerse it in the solution of GO:POLYMER=3:1, 3:3, 3:6, 3:9, 3:12 respectively, Through extrusion-impregnation, the foam can fully absorb th...

Embodiment 3

[0086] The method of preparing a three-dimensional photothermal converter is shown in Example 2. A small rectangular opening of 5mm*5 mm is formed in the middle of the photothermal converter by using a ring knife, and 20wt% of simulated seawater is treated with an intermediate water supply method, and the light intensity is 1kw m 2 .

[0087] The results show that the water evaporation rate and photothermal conversion efficiency of the three-dimensional photothermal converter have not decreased after 12 hours of continuous operation, and the salt crystals mainly appear on the edge of the light absorber. out of the light absorber.

[0088] Table 2 The actual treatment effect of the light absorber in the intermediate water supply on high-concentration seawater

[0089]

[0090]

[0091] The results of the examples show that the three-dimensional light-to-heat conversion material synthesized by graphene oxide, polymer electrolyte, and melamine foam has excellent light abso...

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Abstract

The invention discloses a three-dimensional photothermal conversion material, device and method capable of efficiently treating saline water and wastewater. The preparation method comprises the following steps: adjusting the pH value of a graphene oxide solution to 7-13 to obtain a solution A; preparing a polymer electrolyte solution to obtain a solution B; dropwise adding the solution B into the solution A according to the concentration ratio of the solution A to the solution B being (3:1)-(3:12) to obtain an electrified graphene oxide compound solution; immersing pretreated clean and dry melamine foam into an electrified graphene oxide compound solution, so that the electrified graphene oxide compound solution is fully absorbed by the melamine foam; and placing the melamine foam subjected to adsorption saturation in a drying oven at 60-200 DEG C for heat treatment for 6-24 hours, and cleaning and drying the melamine foam to obtain the three-dimensional photothermal conversion material. The material disclosed by the invention is high in photothermal conversion rate, good in performance stability, good in elasticity, easy to cut, capable of being recycled for multiple times, simple in preparation process, low in synthesis cost and wide in application range, and can be used for desalination of seawater with low to high concentration, purification of combined polluted water and the like.

Description

technical field [0001] The invention belongs to the field of seawater desalination and sewage purification, and in particular relates to a three-dimensional photothermal conversion material, device and method capable of efficiently treating salt water and waste water. Background technique [0002] With the growth of population and the development of society, the shortage of energy and water resources seriously threatens the survival and development of human beings. Solar evaporation technology can use sustainable sunlight as the driving force, and with the help of the core component of the photothermal converter, it can achieve efficient water evaporation with the converted heat energy. In recent years, a variety of photothermal converters have been reported, such as noble metals based on the principle of plasmon resonance, semiconductors based on the principle of recombination of photogenerated carriers to generate heat, and carbonaceous materials based on the vibration and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/14C02F103/08
CPCC02F1/14C02F2103/08Y02A20/212Y02A20/124Y02A20/142
Inventor 陈宝梁杨芷
Owner ZHEJIANG UNIV
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