Method for preparing g-C3N4 hollow fiber film on large scale

A g-c3n4, fiber membrane technology, applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc., can solve problems such as difficulty in large-scale production, simplification, miniaturization, and intensification of membrane components.

Inactive Publication Date: 2016-05-11
DALIAN OCEAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the g-C prepared in the industry at present 3 N 4 The membrane must have a support during operation, which is not conducive to

Method used

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  • Method for preparing g-C3N4 hollow fiber film on large scale
  • Method for preparing g-C3N4 hollow fiber film on large scale

Examples

Experimental program
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Embodiment

[0020] The first step: Weigh 10g of melamine and put it into a crucible, put the crucible into a muffle furnace, burn it in the air at a temperature of 500°C for 3 hours, and cool it down to room temperature naturally to obtain g-C 3 N 4 Block;

[0021] Step 2: Take out 5g of g-C 3 N 4 block, uniformly ground to obtain g-C 3 N 4 Powder;

[0022] Step 3: Add 5g of g-C 3 N 4 Put the powder into a muffle furnace, burn it in the air at a temperature of 550°C for 2 hours, and cool it down to room temperature naturally to obtain g-C 3 N 4 Nanosheets;

[0023] Step 4: Weigh 1g of g-C 3 N 4 Nanosheets were dispersed in 10 mL of N,N-dimethylformamide, and stirred continuously for 3 hours until uniformly dispersed, then 0.5 g of polyvinyl butyral was added to the dispersed solution, and continuously stirred on a strong stirrer Stir for 6 hours until uniformly dispersed to obtain g-C 3 N 4 Casting solution;

[0024] Step 5: Pass the casting solution at 25mL / h and water at ...

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Abstract

The invention discloses a method for preparing a g-C3N4 hollow fiber film on a large scale. The method includes the following steps of putting melamine or urea or a mixture of melamine and urea in a muffle furnace, firing the material at a temperature of 450-600 DEG C for 1-4 hours to obtain yellow g-C3N4 blocks, evenly grinding the yellow g-C3N4 blocks to form g-C3N4 powder, putting the g-C3N4 powder in the muffle furnace, firing the g-C3N4 powder at a temperature of 400-700 DEG C for 1-4 hours to obtain g-C3N4 nanometer sheets, dispersing the g-C3N4 nanometer sheets and polymers in organic solvent to prepare a casting membrane solution, and spinning the casting membrane solution (as a shell solution) and water (as a core solution) in a coagulating bath at the same time through a spinning head of a spinning machine to obtain the g-C3N4 hollow fiber film, wherein the mass ratio of g-C3N4 nanometer sheets to polymer to organic solvent is 1:(0.2-1):(4-10) and the ratio of shell solution flow speed to core solution flow speed is (0.5-5):1.

Description

technical field [0001] The invention relates to the field of membrane technology, in particular to a large-scale preparation of g-C 3 N 4 Hollow fiber membrane method. Background technique [0002] The membrane has the functions of separation, concentration and purification, and the membrane separation process is simple and easy to control. At present, membrane separation technology has been widely used in food, medicine, biology, environmental protection, chemical industry, metallurgy, energy, petroleum, water treatment and other fields. [0003] Hollow fiber membranes have the advantages of low cost, large flux, and simple preparation methods. However, due to the single function of the membrane during use, the surface of the membrane is easily polluted. Therefore, traditionally, a photocatalyst is compounded on the surface of the membrane, and the pollutants on the membrane surface are removed by photocatalytic oxidation reaction, which can effectively alleviate the me...

Claims

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Application Information

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IPC IPC(8): B01D71/02B01D69/08B01D67/00
CPCB01D71/02B01D67/0039B01D69/08
Inventor 王华张奇刘萱吕丰訸刘璐
Owner DALIAN OCEAN UNIV
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