Novel graphene three-dimensional skeleton porous photocatalysis film preparation method

A technology of three-dimensional skeleton and photocatalytic film, which is applied in the direction of chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problem of losing high specific surface area of ​​graphene and unfavorable long-term Operation, membrane fouling and other problems, to achieve the effect of large specific surface area, superior electrical conductivity, and improved membrane passability

Inactive Publication Date: 2018-05-18
OCEAN UNIV OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] In addition, as a separation membrane, graphene membrane can be used for molecular sieving, seawater desalination, gas phase separation, proton and deuteron separation, etc., but it loses the high specific surface area of ​​graphene, and there are also cases of membrane pollution caused by organic pollutants. Conducive to continuous long-term operation
The applicant found that embedding carbon quantum dots (1-10nm) between the graphene oxide sheets can inhibit the recombination of the sheets and adjust the pore size between the sheets to improve the permeability of the film, but the graphene oxide film has no Photocatalytic ability

Method used

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  • Novel graphene three-dimensional skeleton porous photocatalysis film preparation method
  • Novel graphene three-dimensional skeleton porous photocatalysis film preparation method
  • Novel graphene three-dimensional skeleton porous photocatalysis film preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0025] Step 1: preparing the semiconductor photocatalytic material required for the photocatalytic film;

[0026] Take Cu 2 O or Cu 2 Take the synthesis of O-CuO nanowires as an example, add 250ml deionized water to a 500ml three-neck flask, then add 85.63g NaOH and dissolve it completely, then add 0.44g CuSO 4 ·5H 2 O, pass nitrogen atmosphere protection into the reactor, stir at 500rpm for 20 minutes to obtain a uniform solution; then add 2.14ml of ethylenediamine and 0.18ml of hydrazine hydrate in sequence, keep at 80°C for 60 minutes to obtain a red Cu nanowires; finally obtain Cu by adjusting the oxidation temperature or time of Cu nanowires in an environment with a humidity of 65% to 70%. 2 O or Cu 2 O-CuO nanowires.

[0027] Step 2: Assembly of nanowire / graphene oxide three-dimensional framework porous membrane material

[0028] Take Cu 2 O nanowire / graphene oxide film assembly as an example, a certain mass of Cu 2 O nanowires were added to 30ml graphene oxide s...

Embodiment 2

[0034] Take Cu 2 O-TiO 2 Synthesis of nanowires as an example

[0035] In order to verify the beneficial effect of the present invention, the inventor used Cu 2 O and TiO 2 nanowires as an example, the assembled Cu 2 O-TiO 2 Compared with the traditional photocatalytic composite membrane, the nanowire / graphene three-dimensional porous photocatalytic membrane has superior electrical conductivity and larger specific surface area, which provides a more effective diffusion path for pollutants to enter the membrane framework, and provides a new way for photocatalysis. The reaction provides more active centers, increases the reflection of incident light and improves the utilization of light; Cu 2 O-TiO 2 Nanowire / graphene forms heterogeneous knots to enhance photocatalytic performance; as a filter membrane, the constructed pores maintain excellent separation performance while improving membrane passability. This project lays the foundation for the development of efficient, st...

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Abstract

The invention discloses a novel graphene three-dimensional skeleton porous photocatalysis film preparation method, which comprises: embedding different types of semiconductor nanometer materials (p-type and n-type) with photocatalytic ability in graphene oxide, and carrying out bulking and reducing treatment to obtain the graphene three-dimensional skeleton porous photocatalysis film. The specificsteps comprise: 1, preparing semiconductor nanometer materials required by a photocatalysis film, wherein the semiconductor nanometer materials comprise Cu2O, Cu2O-CuO, TiO2 nano-wires, and the like;2, assembling a nano-wire/graphene oxide three-dimensional skeleton porous film material, wherein nano-wires are assembled into a graphene oxide film by using a vacuum suction filtration method, andthe nano-wire/graphene oxide is treated by using a fast freezing vacuum drying method or a bulking process to construct a three-dimensional skeleton porous structure; and 3, reducing the nano-wire/graphene oxide three-dimensional skeleton porous film, wherein the chemical structure of the nano-wire photocatalyst is maintained while the reducing of the graphene oxide film is achieved by using hydrogen iodide as a reducing agent.

Description

technical field [0001] The invention relates to the field of photocatalytic membranes, in particular to a method for preparing a novel graphene three-dimensional skeleton porous photocatalytic membrane. Background technique [0002] Membrane separation technology is a very potential pollutant separation and purification technology, but in the application, there are problems such as the decrease of membrane flux and the shortening of membrane service life caused by pollutants causing membrane fouling, which restricts the wider application of membrane materials. application. The photocatalytic technology has a strong ability to treat organic pollutants, and has the characteristics of broad spectrum, high cleanliness, mild reaction conditions, and no secondary pollution. It can be used to treat pollutants attached to membrane materials. Combining photocatalytic technology with membrane separation technology to develop photocatalytic membranes can realize the self-purification ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/72B01D71/02B01D67/00
CPCB01D67/0039B01D71/024B01D2325/10B01J23/72B01J35/004B01J35/065
Inventor 王文泰种奔郑素莲李春虎冯丽娟王亮
Owner OCEAN UNIV OF CHINA
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