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Preparation method of photocatalytic material for efficiently degrading methylene blue dye in wastewater

A technology of methylene blue dye and photocatalytic material, which is applied in the field of photocatalytic material preparation, can solve the problems of difficulty in controlling the morphology of graphitic carbon nitride, narrow light absorption range, small specific surface area, etc. The effect of good performance and large specific surface area

Pending Publication Date: 2020-08-25
JIANGSU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The graphite phase carbon nitride obtained by this method is difficult to control the morphology, has the characteristics of small specific surface area, poor hydrophilicity, and narrow light absorption range, and the effect of degrading organic pollutants needs to be further improved.

Method used

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  • Preparation method of photocatalytic material for efficiently degrading methylene blue dye in wastewater
  • Preparation method of photocatalytic material for efficiently degrading methylene blue dye in wastewater

Examples

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Effect test

Embodiment 1

[0025] Example 1: Preparation and application of a photocatalytic material for efficiently degrading methylene blue dye in wastewater

[0026] (1) Accurately weigh 0.63 g of melamine and 0.64 g of cyanuric acid and place them in 500 mL clean beakers respectively, add 200 mL of secondary water to each, stir magnetically for 30 min, and set the temperature at 60°C to obtain clear melamine and cyanuric acid solution;

[0027] (2) Keep the temperature at 60°C, quickly mix the cyanuric acid solution with the melamine solution, continue magnetic stirring for 2 h, and form a white precipitate of supramolecular self-assembly, after standing still, centrifuge to remove the secondary water, and place the white precipitate at 80 Dry at ℃ for 12 h;

[0028] (3) Weigh 1 g of the above white solid into a crucible and place it in a muffle furnace for high-temperature calcination. The program is set to rise to 550 °C at a rate of 10 °C / min, keep the temperature for 4 h, and cool the calcined...

Embodiment 2

[0033] (1) Collect the reaction solution after the degradation treatment in Example 1, centrifuge to remove the liquid, and the carbon nitride solid in the graphite phase is washed and separated by secondary water and ethanol, dried at 80°C for 12 h, and cooled to room temperature Put the reclaimed graphite phase carbon nitride into a mortar and grind for 30 min to obtain powdered graphite phase carbon nitride;

[0034] (2) Take 150 mL of wastewater containing 10 mg / L methylene blue dye and place it in a photodegradation quartz reactor, add 150 mg of recovered graphite phase carbon nitride, and stir for 30 min in the dark to make graphite phase carbon nitride and methylene blue The dye is fully functional; 2 mL of the reaction solution is filtered through a 0.22 μm needle filter, and the filtrate is stored in a labeled brown centrifuge tube. After turning on the circulating cooling water, continue stirring to keep the temperature of the reaction solution at 15-25 °C. Turn on a...

Embodiment 3

[0038] (1) Collect the reaction solution after the degradation treatment in Example 2, centrifuge to remove the liquid, and the carbon nitride solid in the graphite phase is washed and separated by secondary water and ethanol, dried at 80°C for 12 h, and cooled to room temperature Put the reclaimed graphite phase carbon nitride into a mortar and grind for 30 min to obtain powdered graphite phase carbon nitride;

[0039] (2) Measure 100 mL of wastewater containing 10 mg / L methylene blue dye into a photodegradation quartz reactor, add 100 mg of recovered graphite phase carbon nitride, and stir for 30 min in the dark to make graphite phase carbon nitride and methylene blue The dye is fully functional; take 2 mL of the reaction solution and filter it through a needle filter of 0.22 μm, put the filtrate into a brown centrifuge tube and save it, turn on the circulating cooling water and continue to stir to keep the temperature of the reaction solution at 15-25 ℃, turn on 300 Light t...

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Abstract

The invention discloses a preparation method of a photocatalytic material for efficiently degrading methylene blue dye in wastewater. The preparation method comprises the following specific steps: preparing different triazine derivative solutions; preparing a supramolecular self-assembly; and preparing graphite-phase carbon nitride. Graphite-phase carbon nitride prepared by taking the supramolecular self-assembly as a precursor has a relatively large specific surface area and uniform structural morphology, so that the total amount of methylene blue adsorbed on the surface of carbon nitride isincreased, and the degradation efficiency of methylene blue dye is improved; when the graphite-phase carbon nitride prepared by the method disclosed by the invention is used for treating wastewater containing methylene blue dye, the degradation efficiency is high, and the stability is good; the photocatalytic material can be repeatedly used for multiple times, so that the treatment cost is favorably reduced; and possibility is provided for large-scale practical application.

Description

technical field [0001] The invention relates to the technical field of dye wastewater treatment, in particular to a preparation method of a photocatalytic material for efficiently degrading methylene blue dye in wastewater. Background technique [0002] With the continuous improvement of my country's industrialization level, fine chemical, pharmaceutical, printing and dyeing industries have developed rapidly, accompanied by the generation of a large amount of organic polluting wastewater, of which dye wastewater occupies a certain proportion. Dye wastewater has a serious impact on the ecological environment and human health because it contains a certain amount of toxic substances and most dyes and their metabolic intermediates are mutagenic, carcinogenic and other toxic. Moreover, dye wastewater has the characteristics of complex composition, high chroma, poor biodegradability and refractory degradation, so it is difficult to treat dye wastewater. [0003] Methylene blue is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B21/082B01J27/24B01J37/08C02F1/30C02F1/72
CPCC01B21/082B01J27/24B01J37/082C02F1/30C02F1/725C02F1/722C01P2004/03C02F2101/308C02F2305/10B01J35/39
Inventor 上官莉刘磊孙建华
Owner JIANGSU UNIV OF TECH
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