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Series of halogen element-doped covalent triazine organic polymer visible light photocatalysts and preparation and application thereof

A halogen element and covalent triazine technology is applied in the field of halogen element doped covalent triazine organic polymer visible light photocatalyst and its preparation, which can solve the problem of high photogenerated carrier recombination rate, restricted application and quantum efficiency. low problems, to achieve the effect of simple and convenient preparation method, high practical value and application prospect

Active Publication Date: 2018-07-27
FUZHOU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Studies have shown that covalent triazine organic polymers (CTFs) can use visible light to split water to generate hydrogen, but there are still problems of high photogenerated carrier recombination rate and low quantum efficiency, which restricts its further application in the field of photocatalysis

Method used

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  • Series of halogen element-doped covalent triazine organic polymer visible light photocatalysts and preparation and application thereof
  • Series of halogen element-doped covalent triazine organic polymer visible light photocatalysts and preparation and application thereof
  • Series of halogen element-doped covalent triazine organic polymer visible light photocatalysts and preparation and application thereof

Examples

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Effect test

Embodiment 1

[0024] Example 1: Preparation of halogen element doped covalent triazine organic polymer visible light photocatalyst

[0025] Weigh 4 g of ammonium fluoride and 0.2 g of covalent triazine organic polymer and mix them in 30 mL of distilled water, ultrasonically disperse for 0.5 h, and then heat to remove water in an oil bath at 90 °C; the obtained solid is heated in a muffle furnace at 250 °C Calcined under the same conditions for 2 h; after naturally cooling to room temperature, the sintered solid was ground into powder, and refluxed with methanol at 90 °C for 12 h; the refluxed sample was washed and centrifuged until the ion concentration was less than 10 ppm, and dried at 60 °C for 12 h. After h, 20% fluorine-doped covalent triazine organic polymer visible light photocatalyst was obtained, denoted as CTFF 20 .

Embodiment 2

[0026] Example 2: Preparation of halogen element doped covalent triazine organic polymer visible light photocatalyst

[0027] Weigh 4 g of ammonium chloride and 0.2 g of covalent triazine organic polymer and mix them in 30 mL of distilled water, ultrasonically disperse for 0.5 h, then heat to remove water in an oil bath at 90 °C; Calcined under the same conditions for 2 h; after naturally cooling to room temperature, the sintered solid was ground into powder, and refluxed with methanol at 90 °C for 12 h; the refluxed sample was washed and centrifuged until the ion concentration was less than 10 ppm, and dried at 60 °C for 12 h. After h, 20% chlorine-doped covalent triazine organic polymer visible light photocatalyst was obtained, denoted as CTFCl 20

Embodiment 3

[0028] Example 3: Preparation of halogen element doped covalent triazine organic polymer visible light photocatalyst

[0029] Weigh 4 g of ammonium bromide and 0.2 g of covalent triazine organic polymer and mix them in 30 mL of distilled water, ultrasonically disperse for 0.5 h, and then heat to remove moisture in an oil bath at 90 °C; the obtained solid is heated in a muffle furnace at 250 °C Calcined under the same conditions for 2 h; after naturally cooling to room temperature, the sintered solid was ground into powder, and refluxed with methanol at 90 °C for 12 h; the refluxed sample was washed and centrifuged until the ion concentration was less than 10 ppm, and dried at 60 °C for 12 h. After h, 20% bromine-doped covalent triazine organic polymer visible light photocatalyst was obtained, denoted as CTFBr 20 .

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Abstract

The invention belongs to the technical fields of material preparation and photocatalysis, and provides a series of halogen element-doped covalent triazine organic polymer visible light photocatalystsand a preparation method and an application thereof. The halogen element-doped covalent triazine organic polymer visible light photocatalysts are synthesized by a simple heat treatment method. The series of catalysts have good visible light response, can realize visible light decomposition of water to produce hydrogen, and provide a potential solution for energy crisis; moreover, the synthesis method is simple, convenient and wide in range of application and has great application potential.

Description

technical field [0001] The invention belongs to the technical field of material preparation and photocatalysis, and in particular relates to a series of halogen element-doped covalent triazine organic polymer visible light photocatalysts and their preparation methods and applications. Background technique [0002] Semiconductor photocatalysis technology converts low-density solar energy into high-density chemical energy by directly using sunlight to drive chemical reactions, and has shown great potential in solving energy shortages and environmental problems. Among the new photocatalytic materials that have been developed, covalent organic frameworks (COFs) are a class of organic porous polymers with highly crystalline structures connected by covalent bonds, which have the advantages of light density, large specific surface area and good stability. Covalent triazine organic polymers (CTFs) are a typical class of covalent organic framework materials, and the interior is a fra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/06C01B3/04
CPCC01B3/042B01J31/06C01B2203/1041C01B2203/0277B01J35/39Y02E60/36
Inventor 毕进红程智李留义吴棱
Owner FUZHOU UNIV
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