Composite membrane based on synergistic separation and photo-Fenton self-cleaning

A composite membrane and self-cleaning technology, applied in the field of membrane separation, can solve the problems of reduced service life and easy pollution of the membrane, and achieve the effects of enhanced stability, enhanced absorption, and enhanced photo-Fenton activity

Active Publication Date: 2021-05-14
成都恒固新材料科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Among them, graphene oxide (GO) is a common membrane separation material, which has the advantages of abundant oxygen-containing functional groups and adjustable interlayer spacing. However, the pollutants ac

Method used

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  • Composite membrane based on synergistic separation and photo-Fenton self-cleaning
  • Composite membrane based on synergistic separation and photo-Fenton self-cleaning
  • Composite membrane based on synergistic separation and photo-Fenton self-cleaning

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[0038] Example 1

[0039] A preparation method of PAA@NM88B / GO composite membrane is as follows:

[0040] (1)NH 2 - Preparation of MIL-88B(Fe)

[0041] Take 0.54g of FeCl 3 ·6H 2 O and 0.362 g of 2-aminoterephthalic acid were dissolved in 30 mL of DMF, and ultrasonically dispersed for 10 min to form a homogeneous solution. Then the solution was transferred to a 100 mL autoclave, reacted at 110 °C for 12 h, and after natural cooling, washed with DMF and absolute ethanol and centrifuged 3 times to obtain NH 2 -MIL-88B (NM88B for short). Finally, the synthesized brown NM88B was dried in a vacuum oven at 70 °C for 12 h.

[0042] (2) Preparation of PAA@NM88B / GO film

[0043] Add 0.25 mg of GO powder into a beaker filled with pure water, and disperse under ultrasound for 30 min to prepare a uniform dispersion with a concentration of 0.05 mg / mL. Then, 0.13 mg of NM88B was added to the dispersion for ultrasonic dispersion for 30 minutes to obtain a homogeneous mixed suspension...

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Abstract

The invention discloses a composite membrane based on synergistic separation and photo-Fenton self-cleaning. The composite membrane is formed by compounding graphene oxide, polyacrylic acid and NH2-MIL-88B (Fe). The preparation method of the composite membrane comprises the following steps of: ultrasonically dispersing graphene oxide powder into water to prepare a uniform dispersion liquid with the concentration of 0.05 mg/mL; adding NH2-MIL-88B (Fe) into the dispersion liquid, and carrying out ultrasonic dispersion to obtain a uniform mixed suspension; adding polyacrylic acid into the suspension, and carrying out ultrasonic dispersion to form a uniform PAA@NM88B/GO suspension; and pouring the PAA@NM88B/GO suspension into a vacuum filter filled with a nylon membrane substrate, and preparing the composite membrane by using a vacuum filtration method. The composite membrane prepared by the invention effectively retains the retention rate of dye while improving the water flux, has a self-cleaning effect, and provides a new thought for commercial popularization of the graphene oxide membrane.

Description

technical field [0001] The invention relates to the technical field of membrane separation, in particular to a PAA@NM88B / GO composite membrane based on cooperative separation and photo-Fenton self-cleaning. Background technique [0002] Membrane separation technology has become one of the commonly used supporting technologies to solve major problems of global energy, environment and water resources due to its simple operation, energy saving and high efficiency. Among them, graphene oxide (GO) is a common membrane separation material, which has the advantages of abundant oxygen-containing functional groups and adjustable interlayer spacing. However, the pollutants accumulated in the membrane during the separation process are difficult to remove by conventional cleaning methods. , making the membrane more likely to be polluted and reducing the service life of the membrane. To solve this problem, it is of great significance to develop a novel graphene oxide composite membrane ...

Claims

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Application Information

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IPC IPC(8): B01D69/12B01D67/00
CPCB01D67/0079B01D69/12
Inventor 何毅高艺轩范毅余昊张李云马静李虹杰侯瑞彤
Owner 成都恒固新材料科技有限公司
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