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COFs (Covalent Organic Frameworks) nano adsorbing material with high specific surface area, preparation method and application

A nanomaterial and reaction technology, applied in the field of COFs materials and their preparation, can solve the problems of poor adsorption performance of methyl violet dye and polycyclic aromatic hydrocarbons, and achieve the effect of efficient adsorption

Inactive Publication Date: 2019-03-12
BEIJING UNIV OF CHEM TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The object of the present invention is to provide a kind of covalent organic framework material, form the covalent organic framework with melamine / trialdehyde group phloroglucinol Schiff alkali condensation reaction, thereby solve existing material to methyl violet dyestuff and polycyclic aromatic hydrocarbon adsorption poor performance problem

Method used

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  • COFs (Covalent Organic Frameworks) nano adsorbing material with high specific surface area, preparation method and application
  • COFs (Covalent Organic Frameworks) nano adsorbing material with high specific surface area, preparation method and application
  • COFs (Covalent Organic Frameworks) nano adsorbing material with high specific surface area, preparation method and application

Examples

Experimental program
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Effect test

Embodiment 1

[0036] Embodiment 1: Preparation of COFs nanomaterials

[0037]Take 63.0 mg trialdehyde phloroglucinol and 75.6 mg melamine in a glass vial; add 3 mL of dimethyl sulfoxide and 3 mL of methanol (1:1) and 0.2 mL of 6 mol / L acetic acid, sonicated in a glass vial for 10 min, and the mixture was sealed in a Teflon-lined autoclave and heated at 120 °C for 24 h. After cooling to room temperature, a red powder was obtained by filtration, washing with tetrahydrofuran, DMSO and ethanol several times, and drying in a vacuum oven. Take 2.5 mg of adsorbent in a 20 mL glass bottle, add 10 mL of 150 mg / L methyl violet dye solution at a temperature of 313K, stir at 160 rpm, and adsorb for 60 min. The adsorption capacity was 274 mg / g.

Embodiment 2

[0038] Example 2: Take 63.0 mg trialdehyde phloroglucinol and 56.7 mg melamine in a glass vial; add 3 mL of dimethyl sulfoxide and 3 mL of methanol (1:1) and 0.2 mL of 6 mol / L acetic acid, sonicated in a glass vial for 10 min, and the mixture was sealed in a Teflon-lined autoclave and heated at 120 °C for 28 h. After cooling to room temperature, a red powder was obtained by filtration, washing with tetrahydrofuran, DMSO and ethanol several times, and drying in a vacuum oven. Take 2.5 mg of adsorbent and place it in a 20 mL glass bottle, add 10 mL of 100 mg / L methyl violet dye solution with a volume of 10 mL, the temperature is 313K, the stirring speed is 160 rpm, and the adsorption time is 60 min. The adsorption capacity was 247 mg / g.

Embodiment 3

[0039] Example 3: Take 60.6 mg trialdehyde phloroglucinol and 37.8 mg melamine in a glass vial; add 3 mL of dimethyl sulfoxide and 3 mL of methanol (1:1) and 0.2 mL of 6 mol / L acetic acid, sonicated in a glass vial for 10 min, and the mixture was sealed in a Teflon-lined autoclave and heated at 120 °C for 36 h. After cooling to room temperature, a red powder was obtained by filtration, washing with tetrahydrofuran, DMSO and ethanol several times, and drying in a vacuum oven. Take 2.5 mg of adsorbent and place it in a 20 mL glass bottle, add 10 mL of 100 mg / L methyl violet dye solution with a volume of 10 mL, the temperature is 313K, the stirring speed is 160 rpm, and the adsorption time is 60 min. The adsorption capacity was 221 mg / g.

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Abstract

The invention relates to a COFs (Covalent Organic Frameworks) material with high specific surface area, a preparation method and application thereof. The COFs material comprises covalent organic frameworks formed by Schiff-base condensation reaction of triformylphloroglucinol and melamine. The COFs material is controllable in pore diameter and is applicable to adsorption of dye and aromatic-hydrocarbon substances; the benzene ring structure on the COFs material and benzene rings of aromatic amine and aromatic-hydrocarbon compounds have strong Pi-Pi action; the COFs material realizes high-efficiency adsorption of methyl violet, naphthalene, anthracene and phenanthrene of cationic dyes.

Description

technical field [0001] The invention belongs to the field of covalent organic framework materials (COFs), and in particular relates to a COFs material and a preparation method and application thereof. Background technique [0002] Covalent Organic Frameworks (COFs) are crystalline porous materials formed by the connection of organic structural units through covalent bonds. Characterized by low density, high stability, large specific surface area, and permanent porosity, they have predictable designs at the atomic level, including geometric, structural, and functional properties. Due to their porous structure and functional properties, COFs have great application prospects in gas storage, sensing, catalysis, and drug release. They are used as adsorbents in solid-phase extraction (SPE) and solid-phase microextraction (SPME) Used as a new chromatographic stationary phase including gas chromatography (GC), high performance liquid chromatography (HPLC) and capillary electrochrom...

Claims

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Application Information

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IPC IPC(8): B01J20/22B01J20/30C02F1/28C02F101/38C02F101/36C02F101/34C02F101/30
CPCB01J20/226C02F1/285C02F2101/308C02F2101/34C02F2101/36C02F2101/38
Inventor 魏芸郭志伟
Owner BEIJING UNIV OF CHEM TECH
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