Preparation method of graphene-based hydrogel with three-dimensional network structure and photo-thermal desalted water treatment application of graphene-based hydrogel

A network structure, graphene-based technology, applied in the fields of seawater desalination, high-salt concentrated water desalination, and freshwater purification, can solve the problem of low photothermal distillation efficiency, and achieves wide source of raw materials, simple preparation method, and low energy consumption. Effect

Inactive Publication Date: 2020-06-30
HARBIN INST OF TECH
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Problems solved by technology

[0005] The purpose of the present invention is to solve the problem of low photothermal distillation efficiency of existing photothermal conversion materials, and t

Method used

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  • Preparation method of graphene-based hydrogel with three-dimensional network structure and photo-thermal desalted water treatment application of graphene-based hydrogel
  • Preparation method of graphene-based hydrogel with three-dimensional network structure and photo-thermal desalted water treatment application of graphene-based hydrogel

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Example Embodiment

[0022] Specific embodiment 1: This embodiment records a method for preparing a graphene-based hydrogel with a three-dimensional network structure, and the method steps are as follows:

[0023] Step 1: Disperse the graphene oxide solution with a concentration of 10 mg / mL in deionized water ultrasonically, and configure the graphene oxide solution with uniform dispersion and no flocculation;

[0024] Step 2: Add tris(hydroxymethyl)aminomethane hydrochloride to the graphene oxide solution uniformly dispersed by ultrasonic, stir and dissolve, and the tris(hydroxymethyl)aminomethane hydrochloride maintains the pH of the solution to be weakly acidic;

[0025] Step 3: Add dopamine hydrochloride to the mixed solution of step 2, and stir to dissolve;

[0026] Step 4: The above-mentioned uniformly mixed solution is subjected to a hydrothermal reaction at a high temperature, and then subjected to post-treatment to obtain a polydopamine functionalized graphene-based hydrogel.

Example Embodiment

[0027] Embodiment 2: The method for preparing a graphene-based hydrogel with a three-dimensional network structure described in Embodiment 1. In step 1, the mass concentration of the dispersed graphene oxide solution is 1.0-4.0 mg / mL.

Example Embodiment

[0028] Specific Embodiment Three: In the method for preparing a graphene-based hydrogel with a three-dimensional network structure described in specific embodiment 1, in step 1, the ultrasonic dispersion time is 15-20 minutes. If the ultrasound time is too short, the flake graphene oxide cannot be completely peeled off.

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Abstract

The invention discloses a preparation method of a graphene-based hydrogel with a three-dimensional network structure and photo-thermal desalted water treatment application of the graphene-based hydrogel, and belongs to the technical field of fresh water purification, seawater desalination and high-salt concentrated water desalination deep treatment. The method comprises the following steps: ultrasonically dispersing a graphene oxide solution with the concentration of 10mg/mL into deionized water to prepare a uniformly dispersed flocculent-free graphene oxide solution; adding tris (hydroxymethyl) aminomethane hydrochloride into the uniformly ultrasonically dispersed graphene oxide solution, stirring for dissolving, and keeping the pH of the solution to be weakly acidic by tris (hydroxymethyl) aminomethane hydrochloride; adding dopamine hydrochloride, stirring and dissolving; and carrying out hydrothermal reaction on a uniformly mixed solution at high temperature, and carrying out post-treatment to obtain the polydopamine functionalized graphene-based hydrogel. The graphene-based hydrogel prepared by the one-step method is simple in preparation method, wide in raw material source, easy to operate, low in cost, short in period, low in energy consumption and high in repeatability.

Description

technical field [0001] The invention belongs to the technical field of fresh water purification, seawater desalination and high-salt concentrated water desalination advanced treatment, and specifically relates to a preparation method of a graphene-based hydrogel with a three-dimensional network structure and its application in photothermal desalination treatment. Background technique [0002] With the continuous development of society, the rapid growth of population and the deterioration of the environment, many areas are facing the problem of scarcity of fresh water resources. Since seawater resources account for about 97% of global water resources, seawater desalination is an efficient and promising way to solve the shortage of freshwater resources. At present, seawater desalination technologies mainly include low-temperature multi-effect, multi-stage flash evaporation, solar distillation, reverse osmosis, micro-ultrafiltration, electrodialysis, etc. Using solar distillati...

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Application Information

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IPC IPC(8): B01J13/00C02F1/04C02F103/08
CPCB01J13/0052C02F1/048C02F2103/08Y02A20/124
Inventor 王威刘东青张敬敬许颖宋澄杰左金龙
Owner HARBIN INST OF TECH
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