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Application of basic potassium salt modified graphite phase carbon nitride in preparation of cationic dye adsorbent

A technology of graphite phase carbon nitride and cationic dyes, which can be used in adsorption water/sewage treatment, water pollutants, other chemical processes, etc. The effect of avoiding decomposition problems

Pending Publication Date: 2021-01-05
BEIJING UNIV OF CHEM TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this material uses photocatalysis to remove methylene blue from wastewater, but the adsorption of cationic dyes on this material has not been studied.

Method used

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  • Application of basic potassium salt modified graphite phase carbon nitride in preparation of cationic dye adsorbent
  • Application of basic potassium salt modified graphite phase carbon nitride in preparation of cationic dye adsorbent
  • Application of basic potassium salt modified graphite phase carbon nitride in preparation of cationic dye adsorbent

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Embodiment 1

[0055] This embodiment provides a basic potassium salt modified graphite phase carbon nitride, which is prepared by the following preparation method:

[0056] (1) After mixing 3.0 g of melamine and 0.15 g of potassium oxalate, grind for 20 min to obtain a solid mixture;

[0057] (2) Put the solid mixture obtained in step (1) into a muffle furnace for calcination, heat up to 550°C at a heating rate of 5°C / min, and then calcine at 550°C for 2 hours to obtain basic potassium salt modified graphite phase carbon nitride;

[0058] (3) The basic potassium salt modified graphite phase carbon nitride obtained in step (2) is ground, and then washed with 0.1M hydrochloric acid aqueous solution and 50% ethanol aqueous solution until the basic potassium salt modified graphite phase nitrogen The carbonized carbon had a pH of 7.0 and was dried at 80°C for 12 hours.

Embodiment 2

[0060] This embodiment provides a basic potassium salt-modified graphite phase carbon nitride. The only difference from Embodiment 1 is that 0.15 g of potassium oxalate is replaced by 0.3 g of potassium oxalate. The other preparation steps are the same as in Embodiment 1.

[0061] figure 1 For the microscopic morphology of the basic potassium salt modified graphite phase carbon nitride in the scanning electron microscope after the post-treatment of the present embodiment, such as figure 1 As shown, the surface of the modified carbon nitride sample was etched and the layered structure was destroyed. The pore volume of the basic potassium salt modified graphite phase carbon nitride is 0.04cm 3 / g, the pore diameter is 27.9nm. figure 2 Be the XRD pattern of the basic potassium salt modified graphite phase carbon nitride after the post-treatment of the present embodiment, as figure 2 Shown, basic potassium salt on g-C 3 N 4 The crystal form of the carbon nitride has a great...

Embodiment 3

[0063] This embodiment provides a basic potassium salt-modified graphite phase carbon nitride. The difference from Embodiment 1 is that 0.15 g of potassium oxalate is replaced by 0.45 g of potassium oxalate. The other preparation steps are the same as in Embodiment 1.

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Abstract

The invention provides application of basic potassium salt modified graphite phase carbon nitride in preparation of a cationic dye adsorbent. The preparation method of the basic potassium salt modified graphite phase carbon nitride comprises the following steps of: (1) mixing a precursor of carbon nitride with a basic potassium salt, and performing grinding to obtain a solid mixture; and (2) calcining the solid mixture obtained in the step (1) in a muffle furnace to obtain the basic potassium salt modified graphite phase carbon nitride. The surface-modified graphite phase carbon nitride material can be prepared in one step, the preparation process is simple, the operation is convenient, the environment-friendly effect is realized, large-scale preparation can be realized, and the adsorptionperformance on cationic dyes in water is excellent.

Description

technical field [0001] The invention belongs to the technical field of material preparation and water treatment, and in particular relates to the application of a basic potassium salt modified graphite phase carbon nitride in the preparation of a cationic dye adsorbent. Background technique [0002] Dye is a typical representative organic pollutant, mainly from dye synthesis, printing and paper industry, has been detected in many rivers because of its non-biodegradable, carcinogenic, bioaccumulative, high The depth of color has attracted widespread attention. The treatment methods of dye wastewater include biological treatment, adsorption, chemical oxidation, membrane separation, electrodialysis, and ion exchange. Among these methods, adsorption technology is low in cost, simple in operation, and effective in environmental protection. Ideal for dyes. Among them, activated carbon has become a popular choice for adsorbing dyes in wastewater, but its high cost poses economic ...

Claims

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Application Information

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IPC IPC(8): B01J20/04B01J20/22C02F1/28B01J20/30C02F101/30
CPCB01J20/02B01J20/041B01J20/04B01J20/223C02F1/281C02F1/285C02F2101/308Y02W10/37
Inventor 张婷婷谭杰李志锋李杰
Owner BEIJING UNIV OF CHEM TECH
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