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A series of halogen element doped covalent triazine organic polymer visible light photocatalysts and their preparation and application

A technology of halogen elements and covalent triazines, which is applied in the field of visible light photocatalysts and preparations of halogen elements doped covalent triazine organic polymers, can solve the problems of high recombination rate of photogenerated carriers, restricted applications, and quantum efficiency. Low-level problems, to achieve the effect of simple and convenient preparation method, high practical value and application prospect

Active Publication Date: 2020-11-10
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • A series of halogen element doped covalent triazine organic polymer visible light photocatalysts and their preparation and application
  • A series of halogen element doped covalent triazine organic polymer visible light photocatalysts and their preparation and application
  • A series of halogen element doped covalent triazine organic polymer visible light photocatalysts and their preparation and application

Examples

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Embodiment 1

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

[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, disperse ultrasonically for 0.5 h, and heat to remove water under 90 ℃ oil bath conditions; the obtained solid is in a muffle furnace at 250 ℃ Calcined under the conditions for 2 h; after cooling to room temperature, grind the sintered solid into powder, and reflux with methanol at 90 ℃ for 12 h; wash the refluxed sample with water and centrifuge until the ion concentration is less than 10 ppm, and dry at 60 ℃ 12 After h, a 20% fluorine-doped covalent triazine organic polymer visible light photocatalyst is obtained, which is recorded 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, disperse ultrasonically for 0.5 h, and heat to remove water under 90 ℃ oil bath conditions; the obtained solid is in a muffle furnace at 250 ℃ Calcined under the conditions for 2 h; after cooling to room temperature, grind the sintered solid into powder and reflux with methanol at 90 ℃ for 12 h; wash and centrifuge the refluxed sample to an ion concentration of less than 10 ppm, and dry at 60 ℃ 12 After h, a 20% chlorine-doped covalent triazine organic polymer visible light photocatalyst is obtained, which is recorded 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, disperse ultrasonically for 0.5 h, and heat to remove water under 90 ℃ oil bath conditions; the obtained solid is in a muffle furnace at 250 ℃ Calcined under the conditions for 2 h; after cooling to room temperature, grind the sintered solid into powder, and reflux with methanol at 90 ℃ for 12 h; wash the refluxed sample with water and centrifuge until the ion concentration is less than 10 ppm, and dry at 60 ℃ 12 After h, a 20% bromine-doped covalent triazine organic polymer visible light photocatalyst is obtained, which is recorded 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 specifically relates to a series of halogen element-doped covalent triazine organic polymer visible light photocatalysts and a preparation method and application thereof. Background technique [0002] Semiconductor photocatalysis technology converts low-density solar energy into high-density chemical energy by directly using sunlight to drive chemical reactions, showing great potential in solving energy shortages and environmental problems. Among the new photocatalytic materials that have been developed, covalent organic framework materials (COFs) are a class of organic porous polymers with a highly crystalline structure 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 type of typical covalent organic framework materials, and the interior is a fram...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J31/06C01B3/04
CPCB01J31/06B01J35/004C01B3/042C01B2203/0277C01B2203/1041Y02E60/36
Inventor 毕进红程智李留义吴棱
Owner FUZHOU UNIV