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Polycarbonitride-based copolymer as well as preparation method and application thereof

A technology of polycarbonitride and polycarbonitride chains, applied in the field of copolymers, can solve the problems of insufficient light absorption range and fast recombination, and achieve excellent electronic characteristics, high separation efficiency and good catalytic effect

Pending Publication Date: 2021-09-21
SHENZHEN UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to its excellent performance, it has been widely used in the degradation of pollutants, photolysis of water to produce hydrogen peroxide, oxygen production, and other fields in organic synthesis. However, the catalyst still has some problems such as fast carrier recombination and insufficient light absorption range. and other shortcomings, which limit its use

Method used

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  • Polycarbonitride-based copolymer as well as preparation method and application thereof
  • Polycarbonitride-based copolymer as well as preparation method and application thereof
  • Polycarbonitride-based copolymer as well as preparation method and application thereof

Examples

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preparation example Construction

[0077] The present invention also provides the preparation method of the above-mentioned polycarbonate-based copolymer, comprising the steps of:

[0078] Place the monomer for preparing the polycarbonitride segment in a protective gas atmosphere, and react at 400°C to 450°C to prepare a precursor;

[0079] Mix the precursor and the monomers for preparing the polyarylamine segment, place it in a protective gas atmosphere, and carry out a copolymerization reaction at 500°C to 600°C to prepare the polycarbonitride-based copolymerization things.

[0080] The polycarbonate-based copolymer is prepared by heat treatment, and the operation is simple and the production efficiency is high.

[0081] In one embodiment, the mass ratio of the monomers used to prepare the polycarbonitride segment to the monomer used to prepare the polyarylamine segment is (120-6000):1.

[0082] In one embodiment, after mixing the precursor and the segmented monomers for preparing the polyarylamine, the res...

Embodiment 1

[0091] (1) Put 5 g of melamine in a covered crucible, then place it in a muffle furnace, and raise the temperature to 420 °C at a rate of 2 °C / min under an argon atmosphere, keep the temperature for 4 hours, and then naturally cool to room temperature , to obtain melem, which is white in shape.

[0092] (2) Put 3 g of melem and 1 mg of TAP in a mortar, then add 6 mL of ethanol to infiltrate and grind for a certain period of time, and then place it in a vacuum oven at 60° C. for 10 h.

[0093] (3) Place the dried sample in step (2) in a covered crucible, then place it in a muffle furnace, and raise the temperature to 550°C at a heating rate of 2°C / min under an argon atmosphere. After 6 hours, it was naturally cooled to room temperature to obtain PCN-TAP1 with a light brown color.

Embodiment 2

[0095] (1) Put 5 g of melamine in a covered crucible, then place it in a muffle furnace, and raise the temperature to 420 °C at a rate of 2 °C / min under an argon atmosphere, keep the temperature for 4 hours, and then naturally cool to room temperature , to obtain melem, which is white in shape.

[0096] (2) Put 3g of melem and 10mg of TAP in a mortar, then add 6mL of ethanol to infiltrate and grind for a certain period of time, and then put it in a vacuum oven at 60°C for 10h.

[0097] (3) Place the dried sample in step (2) in a covered crucible, then place it in a muffle furnace, and raise the temperature to 550°C at a heating rate of 2°C / min under an argon atmosphere. 6h, and then naturally cooled to room temperature to obtain PCN-TAP2 with a light brown color.

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Abstract

The invention relates to a polycarbonitride-based copolymer as well as a preparation method and application thereof The chain segments of the copolymer comprise 99%-99.7% of a carbon nitride chain segment and 0.03%-0.1% of a polyarylamine chain segment based on the mass percentage of the copolymer. By introducing the polyarylamine chain segment into the polycarbon nitride chain segment, a pi-pi conjugated system is prolonged and widened; and compared with pure polycarbon nitride, the copolymer has a wider light absorption range, a narrower energy band structure, more excellent electronic characteristics and higher separation efficiency of photo-induced electrons and holes, and can be applied to the field of light emitting devices, and finally, the purpose of improving the photocatalytic activity of the polycarbonitride is achieved. Compared with pure polycarbonitride, the copolymer disclosed by the invention is used as a catalyst for photocatalytic preparation of hydrogen peroxide, has a better catalytic effect, can be recycled for multiple times, is very good in stability and is very green and environment-friendly.

Description

technical field [0001] The invention relates to the technical field of copolymers, in particular to a copolymer based on polycarbon nitride and its preparation method and application. Background technique [0002] Hydrogen peroxide is an efficient and environmentally friendly oxidizing agent. In the reaction, it is only converted into water and oxygen, and no toxic by-products are produced in the reaction. Due to these advantages, hydrogen peroxide has been widely used in organic synthesis, wastewater treatment and disinfection, and pulp and paper industry. In addition, it has also been reported that hydrogen peroxide can be used as an oxidant and reductant in a new type of single-chamber fuel cell in the energy field. At the same time, compared with hydrogen, hydrogen peroxide is completely soluble in water and easy to transport. It is an alternative to hydrogen an ideal energy source. [0003] At present, the industrial production of hydrogen peroxide mainly uses the an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24B01J31/06C01B15/027
CPCB01J27/24B01J31/069C01B15/027B01J35/39
Inventor 王杰张启涛俞磊尹苏娜李瑛苏陈良
Owner SHENZHEN UNIV
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