Carbon nitride nanosheet-based photocatalytic composite membrane and preparation method and application thereof

A technology of nanosheet and composite film, applied in the field of g-C3N4 nanosheet-based photocatalytic composite film and its preparation

Active Publication Date: 2021-03-19
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Instead g-C 3 N 4 There are no related reports on the preparation of photocatalytic composite membranes through chemical crosslinking of nanosheets and membrane materials CMPES

Method used

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  • Carbon nitride nanosheet-based photocatalytic composite membrane and preparation method and application thereof
  • Carbon nitride nanosheet-based photocatalytic composite membrane and preparation method and application thereof
  • Carbon nitride nanosheet-based photocatalytic composite membrane and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Take 0.6g of g-C 3 N 4 Nanosheets, added to 20g of N-methylpyrrolidone, ultrasonicated and stirred to obtain g-C 3 N 4 nanosheet dispersion. Add 5.4 g of CMPES to the above g-C 3 N 4 In the nanosheet dispersion, g-C is obtained by ultrasonication and stirring 3 N 4 Composite membrane liquid with a mass ratio of nanosheets to CMPES of 1:9. Pour the composite membrane solution on a clean glass plate, use a scraper to form a film layer with a thickness of 150 μm, and then immerse the glass plate in deionized water to remove the solvent to form g-C 3 N 4 Nanosheet-based photocatalytic composite film.

[0031] 1. Photocatalytic self-cleaning performance test

[0032] Adopt HP4750 ultrafiltration device to the g-C prepared by the present embodiment 3 N 4 The nanosheet-based photocatalytic composite film was tested for BSA anti-pollution. The experimental condition is normal temperature, and the BSA solution with a concentration of 200ppm is used to test the anti-...

Embodiment 2

[0042] Take 1.8g of g-C 3 N 4 Nanosheets, added to 25g of N-methylpyrrolidone, ultrasonicated and stirred to obtain g-C 3 N 4 nanosheet dispersion. Add 4.2 g of CMPES to the above g-C 3 N 4 In the nanosheet dispersion, g-C is obtained by ultrasonication and stirring 3 N 4 Composite membrane liquid with a mass ratio of nanosheets to CMPES of 3:7. Pour the composite membrane solution on a clean glass plate, use a scraper to form a film layer with a thickness of 150 μm, and then immerse the glass plate in deionized water to remove the solvent to form g-C 3 N 4 Nanosheet-based photocatalytic composite film.

[0043] 1. The photocatalytic self-cleaning performance test operation is the same as that in Example 1.

[0044] The results show that the g-C prepared in this example 3 N 4 The pure water flux of the nanosheet-based photocatalytic composite membrane is 259L / m 2 hbar, water flux to BSA solution 15 L / m 2 hbar, the rejection rate of BSA was 80.67%. After cleaning...

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Abstract

The invention discloses a carbon nitride (g-C3N4) nanosheet-based photocatalytic composite membrane and a preparation method and application thereof, and belongs to the technical field of photocatalysis and water treatment. The preparation method comprises the following steps: preparing g-C3N4 nanosheets from dicyandiamide and ammonium chloride, mixing a dispersion liquid of the g-C3N4 nanosheetswith a high polymer material chloromethylated polyethersulfone (CMPES) to prepare a membrane liquid, and carrying out phase inversion to obtain the g-C3N4 nanosheet-based photocatalytic composite membrane. As a composite water treatment technology integrating membrane separation and photocatalysis self-cleaning, the obtained photocatalysis composite membrane has the characteristics of environmental friendliness, low operation cost and high water treatment efficiency, has high pollutant interception and removal rate, good stability and strong anti-pollution performance, and has a wide application prospect in the field of water treatment.

Description

technical field [0001] The invention belongs to the technical field of photocatalysis and water treatment, in particular to a g-C 3 N 4 Nanosheet-based photocatalytic composite film and its preparation method and application. Background technique [0002] With the continuous growth of population and the degradation of environmental ecological functions, water pollution has become one of the important environmental factors that threaten the survival and development of human beings. At present, the further deterioration of my country's water environment pollution has not been effectively curbed, and the impact of water environment pollution on the sustainable development of my country's economy and the potential threat to people's health and social stability are becoming more and more obvious. Therefore, the development of water pollution control technology has attracted more and more attention. At present, the water pollution control methods that have been mature and appli...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/06B01J35/06B01D69/12B01D69/02B01D67/00C02F1/30C02F1/44C02F101/30
CPCB01J31/069B01J31/06B01J35/065B01J35/004B01D69/12B01D69/02B01D67/0002C02F1/30C02F1/444C02F2101/30B01D2325/10
Inventor 邱挺刘敏郑丹丹林小城黄智贤王清莲
Owner FUZHOU UNIV
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