Preparation method and application of C3N4 modified organic membrane

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...

AI Technical Summary

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.

Images