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Application of covalent triazine framework (CTF) material in removal of organic dyes in water phase

A technology of covalent triazine skeleton and organic dyes, applied in adsorption water/sewage treatment, filter regeneration, filtration and separation, etc., to achieve the effect of simple operation, simple and easy regeneration method, and good adsorption and removal effect.

Inactive Publication Date: 2013-07-31
SOUTH CENTRAL UNIVERSITY FOR NATIONALITIES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As far as we know, there is no relevant literature reported on the adsorption properties of rhodamine B, reactive brilliant red X-3B and direct acid-fast scarlet 4BS in aqueous phase using CTF as the adsorption material.

Method used

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  • Application of covalent triazine framework (CTF) material in removal of organic dyes in water phase
  • Application of covalent triazine framework (CTF) material in removal of organic dyes in water phase
  • Application of covalent triazine framework (CTF) material in removal of organic dyes in water phase

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The preparation process of the adsorbent CTF used: synthesized according to the previously reported literature (Angew.Chem.Int.Edit., 2008, 47, 3450-3453). That is, in an inert gas atmosphere, exhaust the gas in the ampoule containing the precursor 1,4-terephthalonitrile and zinc chloride, and seal it. Heating from room temperature to 400°C and keeping it at this temperature for 20 hours, then raising the temperature to 600°C within 30 minutes and keeping it for another 20 hours, grinding the obtained reactant, washing with water to remove zinc chloride, and then using Diluted hydrochloric acid was used to wash away the residual salt, and finally washed again with water and THF to obtain a black powder. The final product was placed in a vacuum oven at 150°C and dried overnight.

[0032] A concise reaction scheme is as follows:

[0033]

Embodiment 2

[0035] Carried out nitrogen physical adsorption, transmission electron microscope scanning and CO 2 Characterization of temperature programmed desorption, figure 1 It shows the nitrogen physical adsorption isotherm curve and the corresponding pore size distribution diagram, showing that the CTF material has the characteristics of double pore size distribution, the pore size is concentrated at 1.4 and 2.8nm, and has a high specific surface area (2071m 2 / g) and large pore volume (1.33cm 3 / g), satisfying the general characteristics as an adsorbent, thus we think it will be an adsorbent material that can effectively remove organic dyes in aqueous phase. Transmission electron microscopy results found that CTF looks like a translucent material, indicating that the material has good porosity, see figure 2 a. CO 2 -TPD results show that there is a large desorption peak at 240°C, indicating that CTF has a large number of surface basic sites of moderate strength, see figure 2 b...

Embodiment 3

[0037] In order to obtain the adsorption capacity of CTF to rhodamine B, according to the technical scheme (5) in the content of the invention, the adsorption experiment of CTF to different concentrations of rhodamine B was studied, and the results are as follows image 3 Shown: At low concentrations (1 x 10 -4 M), CTF can completely adsorb Rhodamine B in the solution. At this time, CTF is not saturated. As the initial concentration of Rhodamine B increases, the adsorption capacity of CTF also gradually increases and reaches 8×10 -4 At M, it can be considered that the adsorption saturation is basically reached. At this time, the corresponding adsorption amount of 1.006mmol / g is the adsorption capacity of CTF for rhodamine B.

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Abstract

The invention belongs to the technical field of applications of new materials and specifically discloses an application of a covalent triazine framework (CTF) adsorption material with an excellent adsorption removal effect in removal of organic dyes in a water phase solution. The material has a good effect when used for adsorption removal of organic dye molecules in industrial wastewater, and the adsorption removal effect of the adsorption material against different types of the organic dye molecules is further considered under different acidic and alkaline conditions. The results show that the material has excellent adsorption capability against the organic dye molecules, the removal effect is particularly obvious against cationic dye molecules, and the material can also be recycled. The adsorption agent belongs to a polymer material, is environment-friendly and excellent in performance, and has industrial application prospects against industrial sewage treatment.

Description

technical field [0001] The invention relates to the technical field of application of emerging materials, in particular to the application of a material with a covalent triazine framework (CTF) structure in adsorption and removal of aqueous organic dyes, and a corresponding regeneration treatment method. Background technique [0002] With the development of social industrialization, environmental pollution is increasing day by day. For dye production plants or factories that use dyes as raw materials, the wastewater discharged contains organic dyes that are not fully utilized, harmful to animals and plants, and difficult to degrade. These discharged organic dyes will cause great harm to the environment and the human body. Therefore, the organic dyes in the dye wastewater need to be effectively eliminated before being discharged into the river. For these discharged organic dyes, there are different treatment methods in industry according to different conditions and requireme...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/28B01J20/34
Inventor 朱君江王涛肖萍李金林
Owner SOUTH CENTRAL UNIVERSITY FOR NATIONALITIES
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