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Preparation method of heteroatom doped carbon material with frame structure

A framework structure and heteroatom technology is applied in the field of preparation of heteroatom doped carbon materials to achieve the effect of increasing specific surface area and wide application

Inactive Publication Date: 2021-01-15
FUJIAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For decades, people have achieved a series of achievements through the design of carbon materials, but the preparation of high-throughput pore-structured carbon materials is still a great challenge

Method used

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  • Preparation method of heteroatom doped carbon material with frame structure
  • Preparation method of heteroatom doped carbon material with frame structure

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Experimental program
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Effect test

Embodiment 1

[0024] Synthesis and oxygen reduction performance of N-doped nanoframes with framework structure

[0025] (1) Preparation of polymer precursor: Disperse 6 g of nano-silica spheres with a diameter of 30 nm in 1000 ml of deionized water, ultrasonicate for half an hour, and maintain magnetic stirring at a rate of 500 rpm. 1.5 g of dopamine and 150 ml of deionized water were mixed and dissolved, and directly added to the silica sphere dispersion. After mixing evenly, 30 g of tris-HCl solution was added dropwise until the pH was 8.5. The reaction system was kept stirring for 20 hours, filtered, and washed 5 times with deionized water to prepare a polymer precursor.

[0026] (2) Synthesis of N-doped carbon with a frame structure: the obtained polymer precursor was placed in a dry pot and placed in the center of the tube furnace, vacuumed, and the tube furnace was cleaned three times with Ar gas. Then keep the Ar gas rate at 100 sccm, heat the tube furnace at a rate of 10 degrees / m...

Embodiment 2

[0029] Synthesis of N / P co-doped carbon materials with framework structure

[0030] Take 3.6g of nano-silica spheres with a diameter of 30nm, disperse them in 1000ml of water, and stir ultrasonically for half an hour, keeping the magnetic stirring rate at 400rpm. Add 900 mg of dopamine, and then add 36 g of tris-HCl solution, sonicate for 20 min, and keep stirring at room temperature for 18 hours. After the polymerization reaction is completed, filter, wash with deionized water several times, and dry in a drying oven to obtain a polymer sample. Put the polymer sample on a porcelain boat and place it in the center of the tube furnace. Put a dry pot containing 5g of sodium hypophosphite at the front of the airflow at a distance of 20cm from the sample. Vacuumize and clean the furnace body with Ar gas three times. Keep at 5 sccm. At 10 degrees / min to 800 degrees, keep carbonization at 800 degrees for 1 hour. The tube furnace cools down naturally. Mix 100 mg of the sample obta...

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Abstract

The invention provides a preparation method of a heteroatom doped carbon material with a frame structure. The method comprises the following steps of adding silicon dioxide spheres into deionized water, and carrying out ultrasonic dispersion to form a silicon dioxide sphere dispersion solution, directly adding dopamine while stirring, dissolving, and then adding a tris-HCl solution to carry out polymerization reaction, washing and drying filter residues to obtain a sample, placing the sample in a porcelain boat, placing the porcelain boat in the middle of a tubular furnace, placing a nonmetalheteroatom-containing compound at the upstream of the airflow of the tubular furnace, and heating for doping, and adding the doped sample into a mixed solution of deionized water and hydrofluoric acid, ultrasonically stirring, washing with deionized water, and drying to obtain the heteroatom doped carbon material. The preparation method has the advantages of low process requirements on equipment,convenience, high efficiency and strong reaction condition controllability, and the prepared material has a frame structure, adjustable heteroatom proportion and content and wide application range. The synthesized heteroatom-doped carbon material with the frame structure can be directly applied to various catalytic and electrocatalytic fields as a carrier or a catalyst.

Description

technical field [0001] The invention relates to a method for preparing a heteroatom-doped carbon material with a framework structure, and belongs to the technical field of material synthesis. Background technique [0002] In order to solve energy and environmental problems in my country and the world and develop a sustainable economy and society, it is imminent to develop clean energy technologies. New energy technologies such as lithium-air batteries, fuel cells, electrochemical nitrogen / carbon dioxide reduction, etc., have the advantages of high energy density and environmental protection, and are regarded as important key technologies for efficient use of clean energy such as solar and wind energy. An important direction of new electrochemical energy conversion and storage. In these new energy conversion technologies, the catalyst is the core and one of the key determinants of the performance and cost of the overall device. To develop green catalysts, carbon-based catal...

Claims

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Application Information

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IPC IPC(8): C01B32/15B01J27/24B01J35/10
CPCB01J27/24C01B32/15B01J35/33B01J35/61
Inventor 黄艺吟
Owner FUJIAN NORMAL UNIV