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Covalent organic polymer based visible-light photocatalyst capable of efficiently reducing CO2

A covalent organic, photocatalyst technology, applied in the field of photocatalysis, can solve the problems of limiting the application of CTF-T1, high recombination rate of photogenerated carriers, and narrow photoresponse range, and achieve high practical value and application prospects, process process Simple and easy to control, the effect of great application prospects

Active Publication Date: 2017-05-31
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, CTF-T1 still has problems such as narrow photoresponse range and high recombination rate of photogenerated carriers, which limit the use of CTF-T1 in photocatalytic reduction of CO. 2 Aspects of application

Method used

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  • Covalent organic polymer based visible-light photocatalyst capable of efficiently reducing CO2
  • Covalent organic polymer based visible-light photocatalyst capable of efficiently reducing CO2
  • Covalent organic polymer based visible-light photocatalyst capable of efficiently reducing CO2

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] At 0°C, add 40 mL of trifluoromethanesulfonic acid into 5.12 g of terephthalonitrile, stir until the terephthalonitrile is completely dissolved, change the oil bath and raise the temperature to 30°C, and keep it for 3 days. The resulting precipitate was rinsed and filtered with 160 mL of dichloromethane, washed with ammonia water, then added with 200 mL of ammonia water and stirred for 12 h, washed with water until neutral, and then centrifuged with methanol once to obtain a solid precipitate; Reflux for 24 h under the same conditions, and then reflux with dichloromethane for 24 h at 70 °C, collect the solid, and dry it in vacuum at 80 °C for 12 h to obtain the covalent organic polymer CTF-T1 based on the triazine structure.

Embodiment 2

[0022] Mix and dissolve 0.1 mL cobalt chloride solution (10 mg / mL concentration) and 0.2 g CTF-T1 in 10 mL distilled water. After ultrasonication for 40 min, heat and stir in a water bath at 80 °C until the water is evaporated to dryness. In a Furnace, calcined at 250°C for 1 h in an air atmosphere to obtain a solid sample; after fully grinding the calcined solid sample, reflux it with methanol at 90°C for 12 h, and dry the obtained solid at 60°C for 12 h , that is, cobalt-doped covalent organic polymer visible-light photocatalyst Co 0.5 / CTF-T1.

Embodiment 3

[0024] Mix and dissolve 0.2 mL cobalt chloride solution (10 mg / mL concentration) and 0.2 g CTF-T1 in 10 mL distilled water. After ultrasonication for 40 min, heat and stir in a water bath at 80 °C until the water evaporates to dryness. In a Furnace, calcined at 250°C for 1 h in an air atmosphere to obtain a solid sample; after fully grinding the calcined solid sample, reflux it with methanol at 90°C for 12 h, and dry the obtained solid at 60°C for 12 h , that is, cobalt-doped covalent organic polymer visible-light photocatalyst Co 1 / CTF-T1.

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Abstract

The invention discloses a covalent organic polymer based visible-light photocatalyst capable of efficiently reducing CO2 and an application of the visible-light photocatalyst. The visible-light photocatalyst is a Co-doped covalent organic polymer, and is synthesized by introducing transition metal Co into a covalent organic polymer based on a triazine structure with a solid-phase reaction sintering method. The solid-phase reaction sintering method is simple to operate and lower in production cost and meets actual production requirements; besides, the obtained photocatalyst has good visible-light response, can efficiently catalyze CO2 reduction under visible light and has great application prospect.

Description

technical field [0001] The invention belongs to the technical field of photocatalysis, and in particular relates to an efficient reduction of CO 2 A covalent organic polymer visible light photocatalyst and its role in the photocatalytic reduction of CO 2 React application. Background technique [0002] In recent years, the combustion of fossil fuels such as coal, oil, and natural gas has released a large amount of CO 2 , resulting in atmospheric CO 2 Concentrations continue to rise, causing the greenhouse effect and seriously threatening the survival and development of human beings. Therefore, the CO 2 Carrying out fixed activation and transformation has great practical significance to the future development of human beings. Among the numerous conversion technologies, photocatalytic reduction of CO 2 It is considered as the most promising technology. Currently, CO can be reduced 2 Most of the photocatalysts are metal oxides, metal sulfides and other materials. Howev...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/28B01D53/86B01D53/62
CPCB01D53/8671B01J31/28B01D2257/504B01D2259/802B01J35/39Y02A50/20
Inventor 毕进红孙龙李留义梁诗景吴棱
Owner FUZHOU UNIV
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