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Bifunctional mixed-type polyacid-based composite material, preparation method and application thereof

A composite material and functional technology, applied in the field of photocatalytic materials, achieves the effects of simple preparation process, cheap and easy-to-obtain synthetic raw materials, and mild reaction conditions

Active Publication Date: 2021-01-01
ZHENGZHOU UNIVERSITY OF LIGHT INDUSTRY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, according to the literature survey, there is no report on bifunctional multi-acid-based composites for fully splitting water.

Method used

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  • Bifunctional mixed-type polyacid-based composite material, preparation method and application thereof
  • Bifunctional mixed-type polyacid-based composite material, preparation method and application thereof
  • Bifunctional mixed-type polyacid-based composite material, preparation method and application thereof

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preparation example Construction

[0036] Another aspect of the embodiment of the present invention also provides the bifunctional hybrid polyacid-based composite material and its preparation method, which includes: adding polymetallic acid with a molar ratio of 2:40:1 to 2:40:3 Oxygenate, copper salt and TPB ligand are fully mixed in a solvent, and then solidified at 110-130°C for 48-72 hours to obtain dark green blocky crystals, which are the bifunctional mixed polyacid complex Material.

[0037] Further, the copper salt includes copper chloride dihydrate, but is not limited thereto.

[0038] Further, the solvent includes any one or a combination of two or more of DMF, acetonitrile and methanol, but is not limited thereto.

[0039] Further, the polyoxometalates include (TBA) 4 [W 10 o 32 ], but not limited to this.

[0040] In some specific embodiments, the preparation method includes: combining copper salt, TPB ligand and polyoxometalate (TBA) 4 [W 10 o 32 ] mixed evenly to obtain the mixture, and th...

Embodiment 1

[0051] Example 1: Preparation of bifunctional hybrid polyacid-based composite material

[0052] Will (TBA) 4 [W 10 o 32 ] (33.2mg, 0.01mmol), CuCl 2 2H 2O (34.1mg, 0.20mmol) and TPB (2.5mg, 0.005mmol) were added to a mixture of N,N-dimethylformamide (DMF, 2.0mL), acetonitrile (4.0mL) and methanol (0.25mL) For stirring, use 1.0mol·L –1 HCl adjusted the pH of the system to 2.3, stirred at room temperature for 30 minutes, then added the above suspension into a 25mL polytetrafluoroethylene reactor, baked at 120°C for 72 hours, and finally cooled to room temperature to obtain dark green Blocky crystals were washed 3 times with DMF and dried at room temperature. The yield was about 56%.

Embodiment 2

[0053] Example 2: Preparation of bifunctional hybrid polyacid-based composite material

[0054] Will (TBA) 4 [W 10 o 32 ] (33.2mg, 0.01mmol), CuCl 2 2H 2 O (34.1mg, 0.20mmol) and TPB (7.5mg, 0.015mmol) were added to a mixture of N,N-dimethylformamide (DMF, 1.0mL), acetonitrile (4.0mL) and methanol (0.5mL) For stirring, use 1.5mol·L –1 HCl adjusted the pH of the system to 2.1, stirred at room temperature for 40 minutes, then added the above suspension into a 25mL polytetrafluoroethylene reactor, baked at 110°C for 60 hours, and finally cooled to room temperature to obtain dark green Blocky crystals were washed 3 times with DMF and dried at room temperature. The yield was about 53%.

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Abstract

The invention discloses a bifunctional mixed polyacid-based composite material and its preparation method and application. The bifunctional hybrid polyacid-based composite material has the following chemical formula: H 48 [Cu I 24 (μ 3 -Cl) 8 (μ 4 -Cl) 6 ](TPB) 24 [Cu II (CH 3 OH)] 6 [W 12 O 40 ] 8 [W 6 O 19 ] 3 , the bifunctional mixed polyacid-based composite material is crystallized in the cubic crystal system, the space group is Pm-3m, and the unit cell parameters are The bifunctional catalytic performance of catalytically decomposing water to produce oxygen has a simple preparation process, mild reaction conditions, and is easy to prepare in large quantities. It has good application value in photocatalytic water reduction to hydrogen and photocatalytic water oxidation to oxygen.

Description

technical field [0001] The invention relates to a bifunctional mixed polyacid-based composite material and its preparation method and application, belonging to the technical field of photocatalytic materials. Background technique [0002] Under the dual pressure of energy crisis and environmental pollution, people urgently need to develop sustainable clean energy materials to solve the fuel problem. Photocatalytic water splitting technology provides an environmentally friendly and excellent method for preparing clean energy materials. Water splitting is composed of two half-reactions of water reduction to hydrogen and water oxidation to oxygen. Metal-organic frameworks, as an emerging class of porous materials, provide a versatile research platform for the design and preparation of water-splitting materials through the purposeful selection of bridging ligands and metal nodes. Compared with photocatalytic water splitting for hydrogen production, there are few examples of ph...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J31/22C01B3/04C01B13/02
CPCC01B3/042C01B13/0207B01J31/1691B01J31/1815B01J35/39Y02E60/36
Inventor 史岽瑛刘春森杜淼郑锐户敏
Owner ZHENGZHOU UNIVERSITY OF LIGHT INDUSTRY
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