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Preparation method and application of C3N4 modified organic membrane

A C3N4, organic membrane technology, applied in the direction of catalyst activation/preparation, chemical instruments and methods, water/sludge/sewage treatment, etc., can solve the problems of application limitations, easy detachment of the bonding layer, pollution, etc., and increase the reuse rate , Easy to recycle and reuse, solve the effect of difficult separation and recycling

Pending Publication Date: 2020-04-07
JINAN ENVIRONMENTAL RES ACAD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the strong hydrophobicity of the organic membrane, it is easy to adsorb organic impurities and be polluted, which limits its application.
What is currently available on C 3 N 4 Most of the relevant research results loaded on organic membranes use methods such as vacuum filtration, grafting, and surface coating. These methods are more complicated to operate, and the binding layer is easy to fall off during operation, and the catalytic efficiency is low.

Method used

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  • Preparation method and application of C3N4 modified organic membrane
  • Preparation method and application of C3N4 modified organic membrane
  • Preparation method and application of C3N4 modified organic membrane

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Embodiment

[0033] This embodiment provides a C 3 N 4 A method for preparing a modified organic membrane, in particular to a method for preparing a CN-PVDF (mesoporous graphite phase carbon nitride-polyvinylidene fluoride) hybrid membrane, comprising:

[0034] Step 1) 80 mg carbonized nitrogen CN (mesoporous g-C 3 N 4 ) and 35.7mg of polyvinylpyrrolidone PVP were added to 3ml of 1-methyl-2-pyrrolidone NMP, and ultrasonic 1h was obtained in a 500W ultrasonic cleaner to obtain a mixed solution, and then 500mg of PVDF was added to the mixed solution (that is, the polymeric membrane material PFM ), wherein the mass ratio of CN to PFM is 1:6.25, stirred at 50° C. for 12 hours, left standing for defoaming for 12 hours, to form a casting solution;

[0035]Step 2) Pour the prepared casting solution onto one side of a clean and dry glass plate, scrape a 250 μm thick liquid film with a square applicator, and place the scraped glass plate in the air for 15 seconds Quickly immerse the glass plate...

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Abstract

The invention provides a preparation method and application of a C3N4 modified organic membrane. The preparation method includes: step 1) adding nitrogen carbide CN and a pore-forming agent into an organic solvent, wherein the mass ratio of CN to the pore-forming agent is 0.4:1-2.5:1, and the mass ratio of the pore-forming agent to the organic solvent is 1:81-1:87; carrying out ultrasonic treatment to obtain a mixed solution, then adding a polymeric membrane material PFM into the mixed solution, with the PFM accounting for 12-15% of the total mass of the PFM and the mixed solution, performingstirring at a constant temperature, and conducting standing and defoaming to form a membrane casting solution; and 2) pouring the prepared membrane casting solution to one side of a clean and dry glass plate, scraping a liquid membrane by a square coater, immersing the glass plate subjected to liquid membrane scraping into deionized water for phase exchange, solidifying the membrane casting solution into a membrane, then taking the membrane out, also soaking the membrane in deionized water, and removing the residual organic solvent to obtain the C3N4 modified organic membrane. According to themethod, the organic membrane has the capability of catalytic degradation of organic matters, and the anti-pollution performance of the membrane is improved.

Description

technical field [0001] The invention relates to the technical field of preparation of environmental functional materials, in particular to a C 3 N 4 Preparation method and application of modified organic membrane. Background technique [0002] Photocatalytic oxidation technology has a wide range of adaptability to degrade organic pollutants. The degradation reaction can be carried out under normal temperature and pressure, and cheap sunlight can be used as the energy required to degrade organic pollutants. It is the most promising environmental technology. one. However, in the process of photocatalytic research, powdery photocatalysts generally have the problems of difficult catalyst recovery and secondary pollution, which can be effectively avoided by immobilizing photocatalysts. [0003] Graphite carbon nitride (g-C 3 N 4 ) is an excellent photocatalyst with good visible light response, low cost and simple preparation process. in g-C 3 N 4 Based on this, through mo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24B01J37/00C02F1/72C02F1/30C02F101/38
CPCB01J27/24B01J37/0009C02F1/725C02F1/30C02F2101/308C02F2101/38C02F2101/40C02F2305/10B01J35/59B01J35/39
Inventor 庄涛赵玉强张利钧张建琳王永新刘善军
Owner JINAN ENVIRONMENTAL RES ACAD
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