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Visible-light-driven self-cleaning graphene oxide oil-water separation membrane as well as preparation method and application thereof

An oil-water separation membrane and graphene dispersion technology, applied in the field of material chemistry, can solve the problems of reducing the service life of oil-water separation membranes, limiting the practical application of membrane separation technology, blocking membrane pores, etc. The effect of cleaning ability, good hydrophilic properties

Active Publication Date: 2020-11-03
XIHUA UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, in the process of oil-water separation, the surface of the membrane material is easily adsorbed by pollutants, leading to serious membrane fouling, blocking the pores of the membrane, reducing the separation efficiency of the membrane, and reducing the service life of the oil-water separation membrane.
At present, traditional oil-water separation membranes generally suffer from membrane fouling, which seriously limits the practical application of membrane separation technology in this field.

Method used

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  • Visible-light-driven self-cleaning graphene oxide oil-water separation membrane as well as preparation method and application thereof
  • Visible-light-driven self-cleaning graphene oxide oil-water separation membrane as well as preparation method and application thereof
  • Visible-light-driven self-cleaning graphene oxide oil-water separation membrane as well as preparation method and application thereof

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preparation example Construction

[0037] This embodiment provides a method for preparing a visible light-driven self-cleaning graphene oxide oil-water separation membrane, comprising the following steps:

[0038] S1. Preparation of GO / TA composite membrane

[0039] Add 0.10g-0.14g of tannic acid (TA) and 0.8ml-1.2ml of graphene oxide dispersion (the content of graphene oxide powder is 40mg-60mg) into 100mL of deionized water, and disperse with ultrasound for 15min- After 25min, add 0.1g-0.3g FeCl to the above mixed solution 3 ·6H 2 O, stirred at room temperature for 5 min. Take 2 mL of the above solution and pump a membrane (hydrophilic, PVDF membrane, 0.22 μm) to prepare a tannic acid-modified graphene oxide composite membrane (GO / TA composite membrane).

[0040] S2. Preparation of GO / TA@FeOOH-x composite membrane

[0041] The GO / TA composite membrane was transferred to a concentration of 0.2wt%-0.6wt% ferric chloride (FeCl 3 ·6H 2 O) solution, place the solution in an oven at 50°C-70°C for 5h-7h. Afte...

Embodiment 1

[0043] Preparation of GO / TA Composite Membranes

[0044] Add 0.12 g of tannic acid (TA) and 1 ml of graphene oxide dispersion (wherein the content of graphene oxide powder is 50 mg) into 100 mL of deionized water, disperse with ultrasound for 20 min, and then add 0.2 g of FeCl 3 ·6H 2 O, stirred at room temperature for 5 min. Take 2 mL of the above solution and pump a membrane (hydrophilic, PVDF membrane, 0.22 μm) to prepare a tannic acid-modified graphene oxide composite membrane (GO / TA composite membrane).

Embodiment 2

[0046] Preparation of GO / TA@FeOOH-0.2 Composite Membrane

[0047] The GO / TA composite membrane prepared in Example 1 was transferred to a concentration of 0.2wt% ferric chloride (FeCl 3 ·6H 2 O) solution, the solution was placed in an oven at 60°C for 6h. After the composite membrane was taken out, it was washed with deionized water and dried in a vacuum oven at 40 °C for 24 h to prepare the GO / TA@FeOOH-0.2 composite membrane.

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Abstract

The invention provides a preparation method of a visible-light-driven self-cleaning graphene oxide oil-water separation membrane. The preparation method comprises the following steps: S1, preparing aGO / TA composite membrane; and S2, loading iron oxyhydroxide on the GO / TA composite film prepared in the step S1 to prepare a GO / TA@FeOOH-x composite film. According to the preparation method of the visible-light-driven self-cleaning graphene oxide oil-water separation membrane provided by the invention, a stable ultrathin skin layer with a good oil-water separation effect is constructed on the surface of a PVDF membrane by utilizing the good film-forming property of the two-dimensional material graphene oxide, so that a stable graphene oxide oil-water separation membrane is formed; further, through a mineralization reaction of ferric ions in a ferric trichloride solution, ferric oxyhydroxide particles are loaded on a tannic acid modified graphene oxide sheet layer, therefore, the preparedvisible-light-driven self-cleaning graphene oxide oil-water separation membrane has good hydrophilic performance and underwater super-oleophobic wetting performance and also has excellent visible-light-driven self-cleaning capability.

Description

technical field [0001] The invention belongs to the technical field of material chemistry, and in particular relates to a visible light-driven self-cleaning graphene oxide oil-water separation membrane and a preparation method thereof. Background technique [0002] With the rapid development of modern industry and the frequent occurrence of oil spill accidents, oily sewage poses a great threat to human ecological balance and human health. It is reported that about 3.2 billion cubic tons of oil enters the water body every year to form oily sewage. In the 21st century, the whole world is facing an era of water scarcity. Therefore, the effective treatment of oily sewage is one of the important ways to obtain water resources, and the effective separation of oil and water is of great significance. Membrane separation technology has the characteristics of low cost and simple operation, and is generally considered to have great application prospects in the treatment of oily sewage...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D69/02B01D69/12B01D67/00B01D17/022C02F1/44C02F1/30C02F1/72C02F101/30
CPCB01D17/0202B01D67/0079B01D69/02B01D69/12B01D2325/10B01D2325/36C02F1/30C02F1/44C02F1/725C02F2101/30C02F2303/14C02F2305/10
Inventor 马兰张李云蒋珍菊钟林希陈锡敏黄燕
Owner XIHUA UNIV
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