Covalent triazine framework material with rich defects, and preparation method and application thereof

A technology with covalent triazine skeleton and defects, applied in chemical instruments and methods, other chemical processes, water/sludge/sewage treatment, etc. The effect of high efficiency, low cost and easy preparation

Active Publication Date: 2019-09-20
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it does not introduce defects, and requires high-temperature reflux during the material preparation process, which wastes a lot of energy and is not suitable for industrial applications. At the same time, dichloromethane and ammonia water are used in the production process, causing further environmental pollution.

Method used

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  • Covalent triazine framework material with rich defects, and preparation method and application thereof
  • Covalent triazine framework material with rich defects, and preparation method and application thereof
  • Covalent triazine framework material with rich defects, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] In this example, the specific steps for preparing a triazine covalent framework material with abundant defects are as follows:

[0030] (1) Add 2mmol of 1,4-terephthalonitrile and 2mmol of 4,4-biphenyldinitrile into the quartz tube in turn, add the rotor, and stir evenly with a magnetic stirrer.

[0031] (2) In an ice-water bath at 0° C., under the protection of nitrogen atmosphere, slowly add 2.5 mL of trifluoromethanesulfonic acid into the quartz tube and keep stirring for 1.5 h to obtain a uniform viscous solution.

[0032] (3) The quartz tube was then transferred to an electric thermostat blast drying oven, and kept at 100° C. for 20 min to obtain a transparent solid substance.

[0033] (4) After grinding the obtained solid with a mortar, it was washed with ethanol and water three times in sequence.

[0034] (5) Dry in an oven at 60°C for 24 hours to obtain a light yellow powder, which is a covalent triazine skeleton with abundant defects.

Embodiment 2

[0036] In this example, the specific steps for preparing a triazine covalent framework material with abundant defects are as follows:

[0037] (1) Add 1mmol of 1,4-terephthalonitrile and 1mmol of 4,4-biphenyldinitrile into the quartz tube in turn, add the rotor, and stir evenly with a magnetic stirrer.

[0038] (2) In an ice-water bath at 0° C., under the protection of nitrogen atmosphere, slowly add 1.25 mL of trifluoromethanesulfonic acid into the quartz tube and keep stirring for 1.5 h to obtain a uniform viscous solution.

[0039] (3) The quartz tube was then transferred to an electric thermostat blast drying oven, and kept at 100° C. for 20 min to obtain a transparent solid substance.

[0040] (4) After grinding the obtained solid with a mortar, it was washed with ethanol and water three times in sequence.

[0041] (5) Dry in an oven at 60°C for 24 hours to obtain a light yellow powder, which is a covalent triazine skeleton with abundant defects.

Embodiment 3

[0043] In this example, the specific steps for preparing a triazine covalent framework material with abundant defects are as follows:

[0044] (1) Add 3mmol 1,4-terephthalonitrile and 3mmol 4,4-biphenyldinitrile to the quartz tube in turn, add the rotor, and stir evenly with a magnetic stirrer.

[0045] (2) In an ice-water bath at 0° C., under the protection of nitrogen atmosphere, slowly add 3.75 mL of trifluoromethanesulfonic acid into the quartz tube and keep stirring for 1.5 h to obtain a uniform viscous solution.

[0046] (3) The quartz tube was then transferred to an electric thermostat blast drying oven, and kept at 100° C. for 20 min to obtain a transparent solid substance.

[0047] (4) After grinding the obtained solid with a mortar, it was washed with ethanol and water three times in sequence.

[0048] (5) Dry in an oven at 60°C for 24 hours to obtain a light yellow powder, which is a covalent triazine skeleton with abundant defects.

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Abstract

A preparation method of a covalent triazine framework material with rich defects comprises the following steps: mixing 1,4-dicyanobenzene with 4,4-biphenyldicarbonitrile, adding trifluoromethanesulfonic acid, performing stirring in a -5-5 DEG C environment under the protection of an inert gas for 1-2 h, raising the temperature to 80-120 DEG C, keeping the temperature for 10-30 min to obtain a transparent solid substance, grinding the transparent solid substance by a mortar, washing the ground solid with ethanol and water, and drying the washed solid to obtain the material. A manner for introducing a defect into a covalent triazine framework is provided by the invention to make the covalent triazine framework have rich adsorption active site, so the obtained material can be used as a highly active adsorbent. The material used as the adsorbent has the advantages of green and environmentally friendly preparation method and low cost; and the material contains rich defect sites as high energy sites for adsorbing pollutants, so the covalent triazine framework can adsorb aromatic substances at a very high adsorption rate and a very high adsorption capacity.

Description

[0001] (1) Technical field [0002] The invention belongs to the field of material preparation, and in particular relates to a covalent triazine skeleton material with abundant defects, its preparation method and application. [0003] (2) Background technology [0004] Adsorption is a commonly used method for removing organic pollutants in water bodies. It has the advantages of high efficiency, low energy consumption, and no secondary pollution. It plays a very important role in industrial wastewater treatment and environmental governance. However, there are many limitations in the use of traditional adsorbents. For example, the nature of the surface groups is relatively single, which limits their adsorption capacity and application range; adsorption. [0005] The covalent triazine skeleton has excellent physical and chemical properties, such as high specific surface area, high thermal stability, high hydrophobicity, and easy surface modification, etc. After manufacturing defe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/22B01J20/30C02F1/28C02F101/32C02F101/34
CPCB01J20/22C02F1/285C02F2101/322C02F2101/327C02F2101/345
Inventor 沈意朱超宋爽
Owner ZHEJIANG UNIV OF TECH
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