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A kind of preparation method and application of covalent organic framework/carbon nitride composite material

A technology of covalent organic framework and composite material, which is applied in the field of preparation of covalent organic framework/carbon nitride composite material, can solve the problems of complicated preparation process of covalent organic framework material, incapability of large-scale production, harsh experimental conditions and the like, Achieve the effects of excellent electron transfer ability, short synthesis time and simple preparation process

Active Publication Date: 2020-07-10
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The present invention effectively solves technical problems such as cumbersome preparation process of covalent organic framework materials, long synthesis time, harsh experimental conditions, incapability of large-scale production, and how to improve its activity. The prepared composite material can be used to efficiently degrade toxic organic Pollutants

Method used

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  • A kind of preparation method and application of covalent organic framework/carbon nitride composite material
  • A kind of preparation method and application of covalent organic framework/carbon nitride composite material
  • A kind of preparation method and application of covalent organic framework/carbon nitride composite material

Examples

Experimental program
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Effect test

Embodiment 1

[0031] (1) Preparation of covalent organic framework / carbon nitride composites

[0032] The preparation method of the covalent organic framework / carbon nitride composite material in this example is as follows:

[0033] 1. Calcining urea at 550°C to obtain carbon nitride powder;

[0034] 2. Mix p-phenylenediamine and triformylphloroglucinol at a molar ratio of 2:3 and stir for 45 minutes. During the stirring process, add a mixture of 1,3,5-trimethylbenzene, dioxane and acetic acid, Collect the red powder with methanol, centrifuge and wash with dichloromethane, dry and calcinate at 180°C for 24 hours under the protection of high-purity nitrogen or argon to obtain a covalent organic framework material as a dark red product;

[0035]In step 2, the volume ratio of 1,3,5-trimethylbenzene, dioxane and acetic acid in the mixture of 1,3,5-trimethylbenzene, dioxane and acetic acid is 1:1:0.01.

[0036] 3. Disperse 150 mg of the carbon nitride powder obtained in step 1 and 50 mg of the...

Embodiment 2

[0042] (1) Preparation of covalent organic framework / carbon nitride composites

[0043] The preparation method of the covalent organic framework / carbon nitride composite material in this example is the same as that in Example 1.

[0044] (2) Degradation of toxic organic pollutants

[0045] Prepare 20mg / L methylene blue solution to simulate toxic organic wastewater (V=100mL), add 20mg oxidant permonomonosulfate (PMS) and 10mg covalent organic framework / carbon nitride composite material prepared in this embodiment at the same time, at 25 It reacts at ℃ for 90 minutes. After testing, the removal rate of toxic organic pollutants is as high as 100%.

Embodiment 3

[0047] (1) Preparation of covalent organic framework / carbon nitride composites

[0048] The preparation method of the covalent organic framework / carbon nitride composite material in this example is the same as that in Example 1.

[0049] (2) Degradation of toxic organic pollutants

[0050] Prepare 20mg / L methyl violet solution to simulate toxic organic wastewater (V=100mL), and add 20mg oxidant permonomonosulfate (PMS) and 10mg covalent organic framework / carbon nitride composite material prepared in this example at the same time, After reacting at 25°C for 90 minutes, the removal rate of toxic organic pollutants is as high as 97.3%.

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Abstract

The invention discloses a preparation method of a covalent organic framework / carbon nitride composite material and application thereof. Firstly, a covalent organic framework material is synthesized byusing p-phenylenediamine and triformyl phloroglucinol as synthetic monomers through a room-temperature solid-phase method, then the covalent organic framework material and carbon nitride are mixed, stirred and dried in methyl alcohol, and pyrolysis is carried out under the protection of inert gas to obtain a target product. The covalent organic framework / carbon nitride composite material disclosed by the invention is large in specific surface area, high in nitrogen doping amount and rich in pore structure and can effectively remove toxic organic pollutants in water by constructing a novel Fenton-like system, and new application of the covalent organic framework material in the field of catalysis is expanded; unavoidable metal ion leaching in the activating process of a metal nano catalystis overcome; and the preparation method has the advantages of simple process, easiness for repeated operation, controllable structure, suitability for large-scale production and the like.

Description

technical field [0001] The invention relates to a preparation method and application of a covalent organic framework / carbon nitride composite material, belonging to the technical field of non-metallic catalyst preparation. Background technique [0002] Toxic organic pollutants in water have a wide range of sources, great harm, and are difficult to remove through the self-purification of water bodies. The problem of their treatment has attracted widespread attention. Advanced oxidation technology has become a research hotspot in water pollution control by generating a variety of highly active free radicals to achieve deep oxidation of organic pollutants. Compared with traditional sewage treatment technology, advanced oxidation technology treats pollutants more thoroughly and requires milder conditions. Among various advanced oxidation technologies, the Fenton-like oxidation technology, which generates a variety of highly active free radicals by activating strong oxidants wit...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/24B01J37/10B01J37/08C02F1/72C02F101/30
CPCB01J27/24B01J37/082B01J37/084B01J37/10C02F1/725C02F2101/308C02F2305/026
Inventor 姚运金胡熠余茂静高梦雪张婕连超
Owner HEFEI UNIV OF TECH
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