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Application of G-C3N4 catalyst in degradation of organic dyes in high-salinity wastewater

A G-C3N4, 1.G-C3N4 technology, applied in the field of photocatalysis, can solve the problems of slow reaction rate, secondary pollution, and low sodium chloride concentration, and achieve simple preparation, green environmental protection cost, and low cost Effect

Pending Publication Date: 2020-09-29
NANHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In short, the photocatalyst used in the prior art degrades organic dyes in water under the condition of sodium chloride, which has disadvantages such as easy to cause secondary pollution, slow reaction rate, and low concentration of sodium chloride.

Method used

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  • Application of G-C3N4 catalyst in degradation of organic dyes in high-salinity wastewater
  • Application of G-C3N4 catalyst in degradation of organic dyes in high-salinity wastewater
  • Application of G-C3N4 catalyst in degradation of organic dyes in high-salinity wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] At room temperature, prepare 50 mL of a mixed solution containing 10 mg / L Rhodamine B (marked as RhB) and 500 mM NaCl, put it into a photocatalytic reactor, add 1.0 g / L G-C 3 N 4 , Stir vigorously for 30 minutes under dark conditions, the purpose is to achieve adsorption-desorption equilibrium on the surface of the catalyst under dark conditions; then carry out photocatalytic reaction under LED radiation, take out the reaction solution at regular intervals, separate, Measure its absorbance and calculate the RhB degradation rate;

[0027] Among them, G-C 3 N 4 The preparation process is:

[0028] Put the precursor melamine in a covered crucible, and bake the melamine at 550°C for 4 hours to obtain light yellow g-C 3 N 4 Solid, ground for later use, crucible covered to prevent volatilization of melamine due to sublimation; weigh 0.3g of ground g-C 3 N 4 Put the powder into a 50mL crystallization kettle, add 25mL of high-purity water, hydrothermally treat at 180°C f...

Embodiment 2

[0034] The only difference from Example 1 is:

[0035] in G-C 3 N 4 During the preparation process, 0.12g of hydrothermally treated sample powder was added, and fired again at 550°C for 4h to prepare G-C 3 N 4 catalyst.

[0036] the G-C 3 N 4 The photocatalytic reaction between the catalyst and 50mL mixed solution containing 10mg / L RhB and 500mM NaCl for 30min, the degradation rate of RhB reached 99%.

Embodiment 3

[0038] The difference with the above-mentioned embodiment only lies in:

[0039] in G-C 3 N 4 During the preparation process, 0.14g of hydrothermally treated sample powder was added, and fired again at 550°C for 4h to prepare G-C 3 N 4 catalyst.

[0040] the G-C 3 N 4 The photocatalytic reaction between the catalyst and 50mL mixed solution containing 10mg / L RhB and 500mM NaCl for 30min, the degradation rate of RhB reached 99%.

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Abstract

The invention relates to the technical field of photocatalysis, and particularly discloses application of a G-C3N4 catalyst in degradation of organic dyes in high-salinity wastewater. The applicationof the catalyst in degradation of organic dyes in high-salinity wastewater has the advantages of simple process, low cost and environmental protection performance, organic dyes in wastewater can be efficiently removed in a wide sodium chloride concentration range, and environmental pollution is reduced.

Description

technical field [0001] The invention relates to the technical field of photocatalysis, and specifically discloses a G-C 3 N 4 Application of catalysts in the degradation of organic dyes in high-salt wastewater. Background technique [0002] The rapid development of industry has greatly promoted the progress of human civilization, but it has also caused a series of environmental problems, such as organic pollutants in high-salt organic wastewater, which seriously threaten human health. Most of the organic pollutants in high-salt organic wastewater come from seawater used in the process of production and life, industrial production and many other fields, and the amount of water is increasing year by year. Direct discharge of organic pollutants in high-salt organic wastewater into soil and water will cause serious destruction. Therefore, the treatment of organic pollutants in high-salt organic wastewater has become one of the key and hot issues in the field of environmental ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24B01J35/10C02F1/30C02F101/30
CPCB01J27/24C02F1/30C02F2101/308C02F2305/10B01J35/60B01J35/39
Inventor 张涛罗才武王中玮姜宁聂煜东刘娅李金春子
Owner NANHUA UNIV
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