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A kind of photocatalyst and its preparation method and application

A technology of photocatalyst and hydrothermal reaction, applied in the field of photocatalysis, to achieve the effect of improving the photocatalytic performance of MOFs, improving catalytic activity, and simple preparation process

Active Publication Date: 2021-11-16
SOUTH CHINA NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the application of MOFs in photocatalysis, especially in the field of photocatalytic water splitting to produce hydrogen, is still in its infancy. More in-depth and systematic research is needed on the application of MOFs in photocatalytic splitting of water to produce hydrogen.

Method used

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  • A kind of photocatalyst and its preparation method and application
  • A kind of photocatalyst and its preparation method and application
  • A kind of photocatalyst and its preparation method and application

Examples

Experimental program
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Effect test

Embodiment 1

[0029] This example provides a series of photocatalyst NH 2 -MIL-125, the preparation method is as follows.

[0030] Configure 10 ml N, N-dimethylformamide with methanol mixed solution (V N,N-二甲基甲酰胺 : V 甲醇 = 9: 1), the total molar number of 3 mmol of 2-amino p-terephthalic acid and 3-amino benzoic acid mixing ligand (the molar ratio of 3-amino benzoic acid in the ligand is X), thoroughly stirred and dissolved After 1 mmol of tetrabutyl titanate, stirred at room temperature for 30 min, transferred to 50 ml of polytetrafluoroethylene hydrothermal reaction kettle, 150 ° C reaction for 3 days. After the hydrothermal reaction is completed, the product is filtered by filtration, washed 3 times with N, N-dimethylformamide and methanol, and the resulting product is placed in a blast oven 120 ° C for 1 day after drying 1 day. NH 2 -MIL-125-X photocatalyst, X is the molar ratio of 3-amino benzoic acid in the ligand, specifically 0% (ie pure NH) 2 -MIL-125), 4% (NH 2 -MIL-125-4%), 5% (NH 2 -...

Embodiment 2

[0032] This embodiment provides a photocatalyst NH 2 -MIL-125-5%, the preparation method is as follows.

[0033] Configure 10 ml N, N-dimethylformamide with methanol mixed solution (V N,N-二甲基甲酰胺 : V 甲醇 = 9: 1), a total of 2-amino p-terephthalic acid having a total molar number of 1 mmol and 3-amino benzoic acid mixed ligand (3-amino benzoic acid in the mixing ligand is 5%), sufficient After stirring dissolved, 1 mmol titanate tetraeth was added, stirred at room temperature for 30 min, transferred to 50 ml of polytetrafluoroethylene hydrothermal reaction kettle, 180 ° C reaction for 16 h. After the hydrothermal reaction is completed, the product is filtered by filtration, washed 3 times with N, N-dimethylformamide and methanol, and the resulting product is placed in a blast oven 120 ° C for 1 day after drying 1 day. NH 2 -MIL-125-5% photocatalyst.

Embodiment 3

[0035] This embodiment provides a photocatalyst NH 2 -MIL-125-5%, the preparation method is as follows.

[0036] Configure 10 ml N, N-dimethylformamide with methanol mixed solution (V N,N-二甲基甲酰胺 : V 甲醇 = 9: 1), 2-amino paff2-amino-benzene terephthalic acid having a total molar number of 4 mmol and 3-amino-amino benzoic acid mixed ligand (3-amino benzoic acid in the mixture is 5%), sufficient After stirring dissolved, 1 mmol of tetraisopropyl titanate was added, and stirred at room temperature for 30 min and transferred to 50 ml of polytetrafluoroethylene hydrothermal reaction kettle, 100 ° C reaction for three days. After the hydrothermal reaction is completed, the product is filtered by filtration, washed 3 times with N, N-dimethylformamide and methanol, and the resulting product is placed in a blast oven 120 ° C for 1 day after drying 1 day. NH 2 -MIL-125-5% photocatalyst.

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Abstract

The invention relates to a photocatalyst and its preparation method and application. The preparation method comprises the steps of: mixing a ligand solution with a titanate, stirring, and performing a hydrothermal reaction to obtain the photocatalyst; the ligand solution is 2-aminoterephthalic acid and 3-aminoisobenzoic acid The mixed solution of the ligand, the mole fraction of 3-aminoisobenzoic acid in the ligand is 4-6%. The invention utilizes the mixed ligand method to prepare a novel MOFs photocatalytic material, and the photocatalytic performance of the photocatalyst can be adjusted by adjusting the ratio of the two ligands, providing a new synthesis method of the photocatalyst, which effectively improves the MOFs The catalytic activity of photocatalysts and the regulation of their morphology. Compared with the pure MOFs photocatalyst, the photocatalytic performance of the defective MOFs obtained according to the preparation method of the present invention is obviously improved, and the preparation process is simple at the same time.

Description

Technical field [0001] The present invention relates to the field of photocatalysis, and more particularly to a photocatalyst and a preparation method thereof and a method thereof. Background technique [0002] Photocatalytic is an environmentally friendly technology of green economy, which is one of the most promising technologies that can effectively utilize solar energy is considered to be the most promising technique to solve the energy crisis in the 21st century. It is currently used in sewage treatment, air purification, carbon dioxide reduction, water decomposition hydrogenation and other fields. Metal-Organic Frameworks, MOFS is a porous material formed from a metal cluster with an organic ligand through a coordination key. Due to the unique structure of MOFS, the porosity, specific surface area and chemical properties can be changed by changing the metal cluster or ligand species. Currently, MOFS has been widely used in gas adsorption, gas separation, gas storage, and ca...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J31/22C01B3/04
CPCB01J31/1691B01J31/223B01J31/1805C01B3/042B01J2531/46C01B2203/0277B01J35/39Y02E60/36
Inventor 王新林碧云陈志鸿
Owner SOUTH CHINA NORMAL UNIVERSITY