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WO3/TiO2 nanotube composite membrane for photocatalytic degradation of waste gas

A nanotube composite and photocatalytic technology, applied in the field of composite membranes, can solve the problems of reducing the possibility of membrane reuse, membrane pollution, affecting the technical cost of membranes, etc., to improve the production effect, improve stability, and excellent anti-pollution performance. Effect

Pending Publication Date: 2022-04-29
邢超
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, current research shows that most membrane materials are easily adsorbed by pollutants such as dyes and proteins, which seriously reduces the possibility of membrane reuse. Membrane fouling is the biggest problem to be faced in membrane separation technology. Membrane fouling The existence of the serious impact on the cost of membrane technology

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Step 1: Mix polyacrylonitrile and N-dimethylformamide, sonicate and reflux, then dilute, filter, wash and dry at 50-70°C for 20-28h;

[0025] Step 2, the mixed solution of polyacrylonitrile and N-dimethylformamide is ultrasonically dispersed in toluene for 20-30min;

[0026] Step 3: Mix the mixed solution worth in step 2 with tetrahydrofuran and sonicate for 10-15 minutes, then add 0.06-0.12mol triethylamine to prepare a mixed solution, use cooling liquid to cool the mixed solution in this step to 0°C, add dropwise 0.05-0.10mol2-bromoisobutyryl bromide is reacted;

[0027] Step 4, adding a catalyst, initiating polymerization under the action of the catalyst, and reacting at 50-70°C for 20-24h;

[0028] Step 5, import the mixed solution prepared in step 4 into deionized water for dispersion, pass the dispersed liquid through a vacuum filtration device, and embed nanotubes on the surface of CA-CN mixed acid fiber membrane under a pressure of 0.06-1.12 MPa to obtain Nano...

Embodiment 2

[0031] The nanotube composite film prepared in the step five is pre-oxidized at a temperature of 180-280°C for 2-6 hours, and then carbonized at a temperature of 650-1200°C for 6-12 hours to obtain a carbon nanotube composite film, so that the nanotube composite film The anti-pollution effect of the nanotube composite film is improved through carbonization.

Embodiment 3

[0033] The pre-oxidation is carried out under the atmosphere of oxygen or air, and the carbonization is carried out under the atmosphere of nitrogen, argon, helium, neon, krypton or xenon, thereby improving the pre-oxidation and carbonization of the nanotube composite film. Effect.

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Abstract

The invention relates to the technical field of composite membranes, in particular to a WO3 / TiO2 nanotube composite membrane for waste gas photocatalytic degradation, which comprises polyacrylonitrile, N-dimethylformamide, toluene, tetrahydrofuran, triethylamine, bromoisobutyryl bromide, sulfonic acid propyl potassium methacrylate and a photocatalytic degradation agent, according to the preparation method disclosed by the invention, the preparation of the prepared nanotube composite membrane is more stable by combining two times of cleaning of dimethylformamide and toluene in the step 1 and the step 2 with a catalyst, and meanwhile, the nanotube composite membrane has excellent anti-pollution performance and photocatalytic degradation: doping oxygen vacancy (OV) into a heterojunction of WO3 / TNTs is obtained by a simple electrochemical method; therefore, the stability of catalysis of the solution for preparing the nanotube composite membrane is improved, and the preparation effect of the nanotube composite membrane is improved.

Description

technical field [0001] The invention relates to the technical field of composite membranes, in particular to a WO3 / TiO2 nanotube composite membrane used for photocatalytic degradation of waste gas. Background technique [0002] Membrane separation technology is currently considered to be one of the most effective technologies in the photocatalytic degradation of exhaust gas. In recent years, a large number of studies have shown that composite membranes have a higher separation efficiency , anti-pollution performance and chemical stability show greater advantages. [0003] The application of carbon nanomaterials (multi-walled carbon nanotubes, graphene oxide, etc.) in the preparation of composite membrane materials has attracted much attention. Among them, carbon nanotubes have great prospects for the application of carbon nanotubes in membrane separation technology due to their excellent thermal stability, good mechanical properties, chemical stability, high specific surfac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D69/12B01D69/02B01D67/00B01D53/86B01D53/38B01J23/30B01J31/06
CPCB01D69/12B01D67/0079B01D69/02B01D53/8678B01J23/30B01J31/069B01D2255/802B01D2255/20707B01D2255/20776B01J35/39
Inventor 邢超
Owner 邢超