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WO3/TpPa-1-COF composite material as well as preparation method and application thereof

A tppa-1-cof, composite material technology, applied in organic compound/hydride/coordination complex catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve problems such as limiting solar energy utilization efficiency, and achieve outstanding Catalytic performance, stable catalytic performance, low cost effect

Pending Publication Date: 2022-01-21
WENZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] As a metal-free organic semiconductor, TpPa-1-COF has the characteristics of suitable energy band structure and physical and chemical stability, and is considered to be a photocatalyst with great potential in response to visible light. However, limited Visible light absorption range limits its solar energy utilization efficiency

Method used

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  • WO3/TpPa-1-COF composite material as well as preparation method and application thereof
  • WO3/TpPa-1-COF composite material as well as preparation method and application thereof
  • WO3/TpPa-1-COF composite material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] A kind of WO 3 / TpPa-1-COF composite material, its preparation method comprises the following steps:

[0057] S1. Synthesis of TpPa-1-COF:

[0058] S1.1 First, add 63mg trialdehyde phloroglucinol and 48mg p-phenylenediamine into the Parker heat pipe, and disperse it uniformly by ultrasonic to obtain a mixture;

[0059] S1.2 Add 1.5mL of 1,4-dioxane, 1.5mL of trimesaldehyde and 0.5mL of acetic acid solution (3M) to the mixture obtained in step S1.1, and ultrasonically dissolve it completely to obtain a uniform solution;

[0060] S1.3 The solution obtained in S1.2 was quickly frozen in a liquid nitrogen bath (77K), degassed through three freezing pump thawing cycles, sealed in vacuum, and then heated at 120°C for 3 days, and the precipitate obtained from the reaction was washed with tetrahydrofuran, N, N-dimethylformamide and acetone are filtered to obtain red product;

[0061] S1.4 Activate the red product synthesized in step S1.3 by exchanging the solvent with anhydr...

Embodiment 2

[0078] A kind of WO 3 / TpPa-1-COF composite material, its preparation method comprises the following steps:

[0079] S1. Synthesis of TpPa-1-COF:

[0080] S1.1 First, add 63mg trialdehyde phloroglucinol and 48mg p-phenylenediamine into the Parker heat pipe, and disperse it uniformly by ultrasonic to obtain a mixture;

[0081] S1.2 Add 1.5mL of 1,4-dioxane, 1.5mL of trimesaldehyde and 0.5mL of acetic acid solution (3M) to the mixture obtained in step S1.1, and ultrasonically dissolve it completely to obtain a uniform solution;

[0082] S1.3 The solution obtained in S1.2 was quickly frozen in a liquid nitrogen bath (77K), degassed through three freezing pump thawing cycles, sealed in vacuum, and then heated at 120°C for 3 days, and the precipitate obtained from the reaction was washed with tetrahydrofuran, N, N-dimethylformamide and acetone are filtered to obtain red product;

[0083] S1.4 Activate the red product synthesized in step S1.3 by exchanging the solvent with anhydr...

Embodiment 3

[0096] TpPa-1-COF, WO prepared by comparative examples 1 and 2 3 Materials and WO 3 Differences in photocatalytic performance of / TpPa-1-COF composites:

[0097] Get respectively 10mg powder samples (respectively TpPa-1-COF, WO prepared in embodiment 1 and embodiment 2 3 Materials and WO 3 / TpPa-1-COF composite material) was dispersed in 100mL aqueous solution containing 0.95g ascorbic acid, ultrasonically dispersed for 30min and placed in a photocatalytic reaction vessel for continuous stirring. Vacuum until the reaction system is in an approximate vacuum state (P≤1.0kpa), continue to illuminate with a 300W xenon lamp, and extract the gas in the reaction tank through an autosampler every hour and send it to the gas chromatograph, which is detected online in real time by the gas chromatograph. The peak position and the size of the peak area can be used to judge the reaction product and the amount produced. TpPa-1-COF prepared in embodiment 1, WO 3 Materials and WO 3 / TpP...

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Abstract

The invention relates to a WO3 / TpPa-1-COF composite material as well as a preparation method and application thereof. The WO3 / TpPa-1-COF composite material is obtained by densely growing sheet-shaped or block-shaped WO3 nanoparticles on the surface of TpPa-1-COF with a flower-shaped structure. The TpPa-1-COF with the flower-shaped structure is obtained by orderly and tightly agglomerating nanorods along a central axis. According to the WO3 / TpPa-1-COF composite material provided by the invention, two phases of TpPa-1-COF and WO3 are firmly combined, and the WO3 / TpPa-1-COF composite material has a large specific surface area, so that the WO3 / TpPa-1-COF composite material has outstanding and stable catalytic performance, the hydrogen production rate reaches 19.89 mmol.g<-1>.h<-1>, and the WO3 / TpPa-1-COF composite material is good in cycling stability and is an efficient and stable photocatalyst.

Description

technical field [0001] The invention belongs to the technical field of production of hydrogen or hydrogen-containing mixtures, in particular to a WO 3 / TpPa-1-COF composite material and its preparation method and application. Background technique [0002] Energy is an important basis for economic and social development. With the continuous development of industrial society, the consumption of fossil fuels has been intensified. At the same time, the toxic and harmful substances produced by the combustion of fossil fuels continue to threaten the living environment of human beings, and the development of new energy is one of the important ways to alleviate the pressure on energy. Among them, solar energy, as a renewable energy source, stands out among the new energy sources due to its advantages of being clean, environmentally friendly and free from geographical restrictions. The utilization of solar energy has two ways: photothermal conversion and photoelectric conversion. T...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/34B01J35/02B01J35/10C01B3/04
CPCB01J31/34C01B3/042B01J35/00B01J35/30B01J35/39B01J35/618B01J35/617B01J35/60Y02E60/36
Inventor 徐全龙孙龙
Owner WENZHOU UNIVERSITY