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Visible-light responsive hafnium-based metal-organic framework material and preparation method thereof

An organic framework and base metal technology, which is applied in the field of preparation of visible light-responsive hafnium-based metal-organic framework materials, can solve the problems of narrow light absorption band and poor stability, and achieves good repeatability, high thermal and chemical stability, high yield effect

Active Publication Date: 2018-12-14
NORTHEAST FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Aiming at the problems of narrow light absorption band and poor stability of common metal-organic framework photocatalysts, the present invention aims to provide a visible light-responsive hafnium-based metal-organic framework material and its preparation method

Method used

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  • Visible-light responsive hafnium-based metal-organic framework material and preparation method thereof
  • Visible-light responsive hafnium-based metal-organic framework material and preparation method thereof
  • Visible-light responsive hafnium-based metal-organic framework material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0018] Preparation of new hafnium-based metal-organic framework materials: Weigh 0.067mmol HfCl 4 , 0.067mmol trans-ethylene bisaminobenzoic acid was added to a 15mL polytetrafluoroethylene reactor lining, 400μL glacial acetic acid and 3mL N,N'-dimethylformamide (DMF) were added to the reactor lining, and stirred at room temperature After 30 minutes, the reactor was transferred to an oven at 100°C and heated for 96 hours to obtain orange-red octahedral block crystals; the crude porous hafnium-based metal-organic framework was washed with DMF and ethanol and dried at 80°C to obtain purified The hafnium-based metal-organic framework material has a yield of 80% (calculated based on the dosage of the organic ligand trans-ethylene bisaminobenzoic acid).

[0019] The hafnium-based metal-organic framework material belongs to the cubic crystal system, the space group Fm-3m, and the unit cell parameters are 29.868, 29.868, 29.868, 90.00, 90.00, and 90.00. Cell volume:

[0020] The ...

Embodiment 2

[0025] Using 100 μL of glacial acetic acid instead of 400 μL of glacial acetic acid in Example 1, repeating the experiment of Case 1, an orange-red octahedral block crystal was obtained, which was washed and dried with DMF and absolute ethanol to obtain a purified porous hafnium-based metal-organic framework material. The yield is 75% (calculated based on the dosage of organic ligand trans-ethylene bisaminobenzoic acid).

Embodiment 3

[0027] Using 800 μL of glacial acetic acid instead of 400 μL of glacial acetic acid in Example 1, repeating the experiment of Case 1, an orange-red octahedral block crystal was obtained, which was washed and dried with DMF and absolute ethanol to obtain a purified porous hafnium-based metal-organic framework material. The yield is 50% (calculated based on the dosage of the organic ligand trans-ethylene bisaminobenzoic acid).

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Abstract

The invention discloses a visible-light responsive hafnium-based metal-organic framework material and a preparation method thereof, and belongs to the intersection field of inorganic chemistry, organic chemistry and material chemistry. According to the invention, hafnium tetrachloride is used as a metal salt, trans ethylene bisaminobenzoic acid is used as an organic ligand, and the novel hafnium-based metal-organic framework crystal material is prepared according to a solvothermal method; a metal-organic framework compound prepared according to the method provided by the invention is relatively high in thermal stability and chemical stability, and large in specific surface area and visible light absorption capacity. The preparation technology provided by the invention is simply and convenient to operate, and has important significance for the preparation of porous visible-light responsive hybrid materials and the application thereof in the field of photocatalysis.

Description

technical field [0001] The interdisciplinary field of inorganic chemistry, organic chemistry and material chemistry of the present invention is particularly related to a preparation method of a visible light-responsive hafnium-based metal-organic framework material. Background technique [0002] Metal-organic frameworks (MOFs) are a kind of porous crystalline hybrid materials with periodic network structure formed by metal or metal clusters and organic ligands connected by coordination bonds. The diversity of topological structures, large specific surface area and easy functionalization of materials have shown great application prospects in many fields such as adsorption, separation, luminescence, sensing, and catalysis. From the perspective of molecular functionality, MOFs-based photocatalysts can be constructed by assembling photocatalytically active metal clusters or ligand molecular units into MOFs materials. In order to make full use of solar energy, it is more practic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G83/00B01J31/22B01J35/10
CPCC08G83/008B01J31/1691B01J31/2243B01J2531/49B01J35/618
Inventor 陈大树
Owner NORTHEAST FORESTRY UNIVERSITY
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