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Novel porous titanium metal-organic framework material for visible-light photocatalytic hydrogen generation and preparation method thereof

An organic framework, photocatalytic technology, applied in catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., to achieve novel structure, good absorption, and good stability.

Active Publication Date: 2019-04-19
ZHEJIANG SCI-TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, light-harvesting applications in MOFs are seldom reported, so it is necessary to prepare a novel Ti-MOFs with high-efficiency photocatalytic hydrogen production, which also opens up a new idea for future energy materials.

Method used

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  • Novel porous titanium metal-organic framework material for visible-light photocatalytic hydrogen generation and preparation method thereof
  • Novel porous titanium metal-organic framework material for visible-light photocatalytic hydrogen generation and preparation method thereof
  • Novel porous titanium metal-organic framework material for visible-light photocatalytic hydrogen generation and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] (1) the desired tricarboxylic acid organic ligand 4,4',4"-tricarboxylic acid triphenylamine (H 3 TCA) was added to a 25mL polytetrafluoroethylene hydrothermal reaction kettle, 5mL N,N-dimethylformamide (hereinafter referred to as DMF) was added, and ultrasonically dissolved to obtain a clear solution;

[0025] (2) Add isopropyl titanate to the clarified solution obtained in step (1) according to the molar ratio of isopropyl titanate to tricarboxylic acid organic ligand 1:1, stir well, and place in a constant temperature oven at 180°C After 24 hours of reaction, during the hydrothermal reaction, the carboxylic acid oxygen of the organic ligand and the titanium ion rearrangement reaction became Ti 6 o 6 metal clusters, and carry out a coordination reaction with organic ligands to obtain a suspension after hydrothermal reaction;

[0026] (3) Naturally cool the hydrothermally reacted suspension obtained in step (2) to room temperature, centrifuge and wash, wash with DMF a...

Embodiment 2

[0028] (1) the required tribasic carboxylic acid organic ligand 1,3,5-three (4-carboxyphenyl) benzene (H 3 BTB) was added to a 25mL polytetrafluoroethylene hydrothermal reaction kettle, and 5mL N,N-dimethylformamide (hereinafter referred to as DMF) was added, and ultrasonically dissolved to obtain a clear solution;

[0029] (2) Add isopropyl titanate to the clarified solution obtained in step (1) according to the molar ratio of isopropyl titanate to tricarboxylic acid organic ligand 1:1.5, stir well, and place in a constant temperature oven at 180°C After 18 hours of reaction, during the hydrothermal reaction, the carboxylic acid oxygen of the organic ligand and the titanium ion rearrangement reaction become Ti6O6 metal clusters, and carry out a coordination reaction with the organic ligand to obtain a suspension after the hydrothermal reaction;

[0030] (3) Naturally cool the hydrothermally reacted suspension obtained in step (2) to room temperature, centrifuge, wash with DMF...

Embodiment 3

[0032] (1) the desired tricarboxylic acid organic ligand H 3Add BTCA to a 25mL polytetrafluoroethylene hydrothermal reaction kettle, add 5mL N,N-dimethylformamide (hereinafter referred to as DMF), and ultrasonically dissolve it fully to obtain a clear solution;

[0033] (2) Add isopropyl titanate to the clarified solution obtained in step (1) according to the molar ratio of isopropyl titanate to tricarboxylic acid organic ligand 1:2, stir well, and place in a constant temperature oven at 180°C After 30 hours of reaction, during the hydrothermal reaction, the carboxylic acid oxygen of the organic ligand and the titanium ion rearrangement reaction became Ti 6 o 6 metal clusters, and carry out a coordination reaction with organic ligands to obtain a suspension after hydrothermal reaction;

[0034] (3) Naturally cool the hydrothermally reacted suspension obtained in step (2) to room temperature, centrifuge and wash, wash with DMF and methanol for 5 times, then reflux with DMF at...

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Abstract

The invention discloses a novel porous titanium metal-organic framework material for visible-light photocatalytic hydrogen generation and a preparation method thereof. The preparation method is characterized in that a series of tribasic carboxylic acid organic ligands are used as organic raw materials, titanium isopropoxide is used as a metal titanium source, through a solvothermal reaction, titanium ions and carboxyl groups are subjected to coordination and rearrangement to form polyoxotitanates, and the polyoxotitanates and the organic ligands are subjected to hexa-coordination to obtain thetitanium metal-organic framework material. In the preparation method, the solvothermal preparation method is simple, the yield is high, the product is pure, the crystallinity is high, the titanium metal-organic framework material obtained by using the method is large in specific surface area, has an excellent capacity of absorbing visible light and is capable of conducting photocatalytic water splitting to generate hydrogen, and the novel porous titanium metal-organic framework material has important environmental benefits and energy application values.

Description

technical field [0001] The invention relates to a metal-organic framework material, in particular to a novel porous titanium metal-organic framework material for visible light photocatalytic hydrogen production and a preparation method thereof, belonging to the technical field of organic materials. Background technique [0002] In the face of serious environmental problems and energy crisis, the demand for clean and sustainable energy is very necessary for the world, but it is still a major challenge. The use of solar photocatalytic water splitting to produce hydrogen is the most promising way to provide clean and high-performance energy One of the solutions. Since visible light accounts for about 43% of solar energy, while ultraviolet (UV) only contributes about 4%, visible light-driven photocatalysis is crucial for efficient utilization of solar energy. Metal-organic frameworks (MOFs), as a new type of porous crystalline materials, have promising applications in many fiel...

Claims

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Application Information

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IPC IPC(8): B01J31/38B01J35/10B01J37/10
CPCB01J31/38B01J37/10B01J35/617B01J35/60B01J35/39
Inventor 高俊阔李常青姚菊明
Owner ZHEJIANG SCI-TECH UNIV
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