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A kind of preparation method of two-dimensional nanoporous structure pd-cof material

A porous structure, two-dimensional nanotechnology, applied in the field of photocatalytic materials, can solve the problems of low crystallinity, slow multi-electron diffusion-control, etc., and achieve excellent adsorption performance, good chemical stability, and mild reaction conditions.

Active Publication Date: 2022-04-26
XIAN UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the characteristics of the COF material itself, such as low crystallinity, and the slow multi-electron diffusion-controlled proton reduction process, how to synthesize a high-efficiency, high-response performance in the light and can significantly degrade organic pollutants COF materials are still a challenging scientific problem in this field

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  • A kind of preparation method of two-dimensional nanoporous structure pd-cof material
  • A kind of preparation method of two-dimensional nanoporous structure pd-cof material
  • A kind of preparation method of two-dimensional nanoporous structure pd-cof material

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preparation example Construction

[0039] A preparation method of a two-dimensional nanoporous structure Pd-COF material, comprising the following steps:

[0040] Step 1, using 4,6-diaminoresorcinol dihydrochloride and 2,4,6-tris(4-carboxyphenyl)-1,3,5-triazine as raw materials, using gradient thermal polycondensation method Preparation of organic framework materials COF, such as figure 1 As shown, specifically:

[0041] Step 1.1: Weigh the synthetic raw materials 4,6-diaminoresorcinol dihydrochloride, 2,4,6-tris(4-carboxyphenyl)-1,3,5-triazine, of which 4,6 - The molar ratio of diaminoresorcinol dihydrochloride to 2,4,6-tris(4-carboxyphenyl)-1,3,5-triazine is 1.2:1 to 1.5:1.

[0042] Step 1.2: Stir the 4,6-diaminoresorcinol dihydrochloride weighed in step 1.1 in polyphosphoric acid, wherein 4,6-diaminoresorcinol dihydrochloride and polyphosphoric acid The molar volume ratio is 10-15mmol / L, and the dehydrochlorination process needs to be stirred at a temperature of 65-80°C for 8-10 hours under the protection...

Embodiment 1

[0057] Step 1: Using 4,6-diaminoresorcinol dihydrochloride and 2,4,6-tris(4-carboxyphenyl)-1,3,5-triazine as raw materials, adopt gradient thermal polycondensation method Prepare the organic framework material COF, specifically:

[0058] Step 1.1: Weigh the synthetic raw materials 4,6-diaminoresorcinol dihydrochloride, 2,4,6-tris(4-carboxyphenyl)-1,3,5-triazine, of which 4,6 - The ratio of the amount of substances of diaminoresorcinol dihydrochloride and 2,4,6-tris(4-carboxyphenyl)-1,3,5-triazine is 1.2:1,4,6- The amount of substance of diaminoresorcinol dihydrochloride is 1.7mmol, and the amount of substance of 2,4,6-tris(4-carboxyphenyl)-1,3,5-triazine is 1.13mmol;

[0059] Step 1.2: Stir the 4,6-diaminoresorcinol dihydrochloride weighed in step 1.1 in polyphosphoric acid at 70°C for 8 hours under the protection of nitrogen, wherein, 4,6-diaminoresorcinol dihydrochloride The molar volume ratio of hydrochloride to polyphosphoric acid is 10mmol / L;

[0060] Step 1.3: Add the...

Embodiment 2

[0077] Step 1: Using 4,6-diaminoresorcinol dihydrochloride and 2,4,6-tris(4-carboxyphenyl)-1,3,5-triazine as raw materials, adopt gradient thermal polycondensation method Prepare the organic framework material COF, specifically:

[0078] Step 1.1: Weigh the synthetic raw materials 4,6-diaminoresorcinol dihydrochloride, 2,4,6-tris(4-carboxyphenyl)-1,3,5-triazine, of which 4,6 -Diaminoresorcinol dihydrochloride and 2,4,6-tris(4-carboxyphenyl)-1,3,5-triazine in a molar ratio of 1.35:1,4,6-diaminom-benzene The amount of substance of diphenol dihydrochloride was 1.9125 mmol, the amount of substance of 2,4,6-tris(4-carboxyphenyl)-1,3,5-triazine was 1.42 mmol;

[0079] Step 1.2: Stir the 4,6-diaminoresorcinol dihydrochloride weighed in step 1.1 in polyphosphoric acid at 65°C for 9 hours, wherein, 4,6-diaminoresorcinol dihydrochloride The molar volume ratio with polyphosphoric acid is 12mmol / L;

[0080]Step 1.3: Add the 2,4,6-tris(4-carboxyphenyl)-1,3,5-triazine weighed in step 1.1...

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Abstract

The invention discloses a preparation method of a two-dimensional nanoporous structure Pd-COF material, comprising: step 1, using 4,6-diaminoresorcinol dihydrochloride and 2,4,6-tris(4- Carboxyphenyl)‑1,3,5‑triazine is used as raw material, and the organic framework material COF is prepared by gradient thermal polycondensation method; step 2, using Pd(OAC) 2 As a Pd source, the organic framework material COF is modified to obtain a two-dimensional nanoporous structure Pd‑COF material. The reaction conditions of the present invention are mild, and the synthesis process is simple and easy to realize. With Pd(OAC) 2 As a Pd source, the organic framework material COF was structurally modified, which effectively improved the photocatalytic decomposition efficiency of COF on organic dyes and antibiotics, and successfully obtained a covalent organic framework material Pd with a new ligand structure. COF.

Description

technical field [0001] The invention belongs to the field of photocatalytic materials, and in particular relates to a preparation method of a two-dimensional nanoporous structure Pd-COF material. Background technique [0002] With the increasing abuse of human antibiotics and the discharge of wastewater from pharmaceutical processes, the residue of undegraded antibiotics in the water environment has become one of the important factors that seriously affect human health and aquatic biological resources in the world. Therefore, finding new materials that are new, environmentally friendly, and can significantly eliminate organic pollution is one of the major scientific problems that humans need to solve. The sun-driven photocatalyst, which converts solar energy into chemical and electrical energy, has been shown to be an effective scavenger for organic pollutants. [0003] Covalent organic framework (COF) is a new research field that has developed rapidly in recent years. It i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G83/00C08G73/22B01J20/22B01J20/28B01J20/30C02F1/30B01J31/22C02F101/30
CPCC08G83/008C08G73/22B01J20/226B01J20/28011C02F1/30B01J31/2217C02F2101/30C02F2305/10B01J2531/824B01J35/39
Inventor 何仰清马占营杨雨星杨谦姚秉华
Owner XIAN UNIV OF TECH