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Graphite/titanium dioxide composite material based polyvinylidene fluoride electrocatalytic ultrafiltration membrane

A technology of polyvinylidene fluoride and composite materials, applied in organic compound/hydride/coordination complex catalysts, physical/chemical process catalysts, ultrafiltration, etc., can solve ultrafiltration membrane membrane fouling and organic pollutants are difficult to effectively Removal and other problems, to achieve the effect of high electrochemical activity

Active Publication Date: 2019-05-14
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the difficulty of effectively removing trace refractory organic pollutants in the environment and the membrane fouling of ultrafiltration membranes, the present invention provides a polyvinylidene fluoride (PVDF) electrocatalytic ultrafiltration membrane based on graphite / titanium dioxide composite material and its preparation Method and Application

Method used

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  • Graphite/titanium dioxide composite material based polyvinylidene fluoride electrocatalytic ultrafiltration membrane
  • Graphite/titanium dioxide composite material based polyvinylidene fluoride electrocatalytic ultrafiltration membrane
  • Graphite/titanium dioxide composite material based polyvinylidene fluoride electrocatalytic ultrafiltration membrane

Examples

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Embodiment 1

[0043] Example 1 Preparation of a polyvinylidene fluoride electrocatalytic ultrafiltration membrane based on graphite / titanium dioxide composite material

[0044] (1) Boil the hydrophilic carbon cloth in 0.1% dilute hydrochloric acid for 30 minutes, wash it with water for 5 times, and then dry it below 50°C for 1 hour to obtain a carbon cloth with a supporting layer function that removes surface impurities and strengthens the electrical conductivity of the carbon cloth;

[0045] (2) Add 400 mg of graphite / titanium dioxide electrocatalytic composite material and 400 μL of Nafion solution to 40 mL of absolute ethanol, and ultrasonically disperse for 30 minutes; then arrange the dry carbon obtained in step (1) on the prepared graphite / titania composite material In the solution, lightly shake the load for 6 hours, and then dry it below 50°C to obtain a carbon cloth loaded with graphite / titanium dioxide composite material;

[0046] (3) Wash the carbon cloth obtained in step (2) in ...

Embodiment 2

[0051] A kind of method based on the polyvinylidene fluoride electrocatalytic ultrafiltration membrane of graphite / titania composite material as described in embodiment 1, difference is:

[0052] The amount of graphite / titania electrocatalytic composite material added in step 2 was 320 mg, and other conditions were the same.

Embodiment 3

[0054] A kind of method based on the polyvinylidene fluoride electrocatalytic ultrafiltration membrane of graphite / titania composite material as described in embodiment 1, difference is:

[0055] The amount of graphite / titania electrocatalytic composite material added in step 2 was 480 mg, and other conditions were the same.

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Abstract

The invention discloses a graphite / titanium dioxide composite material based polyvinylidene fluoride electrocatalytic ultrafiltration membrane as well as a preparation method and application thereof.The ultrafiltration membrane comprises a loose base layer loaded with an electroactive material and a dense active layer with the function of intercepting small molecular trace pollutants; the preparation method comprises the following steps: with hydrophilic carbon cloth as a base, modifying a graphite / titanium dioxide composite material on the carbon cloth through a conductive polymer Nafion, and then preparing a PVDF ultrafiltration layer according to a phase inversion method by using the modified carbon cloth as a base layer so as to form the graphite / titanium dioxide composite material based polyvinylidene fluoride electrocatalytic ultrafiltration membrane. The ultrafiltration membrane is applied as an integrated membrane integrating a filtering technology and an electrocatalytic technology to treatment of trace organic pollutant polluted water; the prepared ultrafiltration membrane can effectively intercept a trace amount of refractory organic pollutants in wastewater; through electrocatalytic performance of the graphite / titanium dioxide composite material, the pollutants are further degraded on the surface of the membrane, so that effective control of the pollutants can be achieved and the problem of membrane pollution can be effectively relieved.

Description

technical field [0001] The invention relates to a polyvinylidene fluoride electrocatalytic ultrafiltration membrane based on a graphite / titanium dioxide composite material, a preparation method and application thereof, and belongs to the technical field of membranes. Background technique [0002] With the development of industrial technology, the problem of water pollution is becoming increasingly serious. Trace pollutants that widely exist in the water environment are difficult to be effectively removed by conventional water treatment technologies due to their small amount. Membrane separation technology is more and more used in water treatment due to its advantages of high efficiency and low energy consumption. It realizes water purification by effectively intercepting micro-pollutants in water. However, in the process of membrane technology development, the problem of membrane fouling restricts its rapid development. At the same time, due to the inherent process characte...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D61/14B01D67/00B01D71/34B01J31/38C02F1/44C02F1/467C02F1/72C02F101/30
Inventor 王允坤任少杰王睿
Owner SHANDONG UNIV
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