Graphene oxide-semiconductor composite membrane of which oil-water separation performances can be enhanced under illumination

A technology of oil-water separation and graphene, applied in the direction of light water/sewage treatment, liquid separation, separation methods, etc., can solve the problems of narrow permeability of two-dimensional nano-channels, achieve high practical value and application prospects, and improve efficiency

Inactive Publication Date: 2018-05-11
FUZHOU UNIV
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

However, such two-dimensional nanochannels are usually narrow and relatively poor in permeability, which limits the application of graphene oxide membranes in wastewater treatment, especially in the field of oil-water separation.

Method used

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  • Graphene oxide-semiconductor composite membrane of which oil-water separation performances can be enhanced under illumination
  • Graphene oxide-semiconductor composite membrane of which oil-water separation performances can be enhanced under illumination
  • Graphene oxide-semiconductor composite membrane of which oil-water separation performances can be enhanced under illumination

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preparation example Construction

[0023] The preparation steps of the present invention are as follows (as figure 1 shown):

[0024] The first step: disperse the semiconductor nanoparticles and graphene oxide into the aqueous solution according to a certain ratio, and mix the two by stirring, ultrasonic and other methods to form a composite sheet material;

[0025] The second step: put a filter membrane in the filter, and then add the suspension of the graphene oxide-semiconductor particle composite sheet obtained in the first step to the filter; Suction filtration of the suspension to form a graphene oxide-semiconductor particle composite film;

[0026] The third step: On the basis of the membrane obtained in the second step, add oil-water emulsion, and vacuum filter under negative pressure to separate oil and water.

[0027] The fourth step: On the basis of the third step, real-time light is applied to filter and separate oil and water.

Embodiment 1

[0029] Preparation of graphene-semiconductor particle composite separation membrane with light-enhanced oil-water separation performance

[0030] The first step: combining graphene oxide with TiO 2 @Ag 0.1% Mix according to the mass ratio of 1:5, and form a mixed suspension after stirring;

[0031] Step 2: Put a filter membrane in the filter, add a composite suspension containing 2.0 g of graphene oxide per square meter of filter area to the filter; filter the suspension under a negative pressure of 10 Pa to form an oxide Graphene-semiconductor particle film.

Embodiment 2

[0033] Preparation of graphene-semiconductor particle composite separation membrane with light-enhanced oil-water separation performance

[0034] The first step: combining graphene oxide with TiO 2 @Ag 0.1% Mix according to the mass ratio of 1:10, and form a mixed suspension after stirring;

[0035] Step 2: Put a filter membrane in the filter, add a composite suspension containing 0.1 g of graphene oxide to the filter per square meter of filter area; filter the suspension under a negative pressure of 5 Pa to form an oxide Graphene-semiconductor particle film.

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Abstract

The invention discloses a preparation method and application of a graphene oxide-semiconductor particle composite separation membrane of which oil-water separation performances can be enhanced under illumination and belongs to the technical field of material preparation and environmental purification. A graphene oxide-TiO2@Ag compound is used for preparing an oil-water separation film and a graphene base film separation function and a semiconductor photocatalytic technology are combined. The graphene oxide-semiconductor composite membrane material has good oil-water separation performances. Through illumination, the semiconductor material in the membrane is stimulated so that the clear water oleophobicity of the membrane is further improved and the oil-water separation efficiency of the composite membrane is improved. The preparation method is simple, utilizes cheap and easily available raw materials, is easy to adjust, is conducive to large-scale industrial production, further improves the oil-water separation efficiency of the membrane under illumination and has remarkable economic and social benefits.

Description

technical field [0001] The invention belongs to the technical field of membrane separation and photocatalysis in material preparation and environmental treatment, and specifically relates to a graphene-semiconductor particle composite separation membrane whose oil-water separation performance is enhanced by light, and a preparation method and application thereof. Background technique [0002] The leakage of crude oil in the process of exploitation, transportation and storage, and the discharge of industrial and domestic oily sewage have brought great harm to the environment and ecological balance. The purification of these oily sewage has made oil-water separation technology more and more people's attention. [0003] In the method of oil-water treatment, membrane separation is a water treatment technology with great development potential. The advantages. Graphene and its derivatives have good film-forming properties and can be well processed and assembled into membrane mate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D69/14B01D69/02B01D71/02B01D67/00C02F1/30C02F1/44C02F1/40
CPCB01D67/0039B01D69/02B01D69/145B01D71/021B01D2325/10B01D2325/36C02F1/30C02F1/40C02F1/44C02F2305/10
Inventor 徐超王晨龙金林员汝胜
Owner FUZHOU UNIV
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