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Carbon-doped mesoporous graphitized carbon nitride nanospheres and its preparation method and application

A carbon nitride and graphitization technology, applied in the field of doping modification of semiconductor materials, can solve the problems of high cost, poor dispersion, poor conductivity, etc., and achieve excellent electrocatalytic hydrogen evolution activity, high conductivity and dispersibility, The effect of good dispersibility and conductivity

Active Publication Date: 2021-01-22
CHINA UNIV OF PETROLEUM (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] However, the current carbon-doped graphitized carbon nitride preparation methods have the disadvantages of cumbersome steps, high cost, poor dispersion and poor conductivity.

Method used

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  • Carbon-doped mesoporous graphitized carbon nitride nanospheres and its preparation method and application
  • Carbon-doped mesoporous graphitized carbon nitride nanospheres and its preparation method and application
  • Carbon-doped mesoporous graphitized carbon nitride nanospheres and its preparation method and application

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Embodiment 1

[0069] This embodiment provides a carbon-doped mesoporous graphitized carbon nitride nanosphere, the preparation method of the carbon-doped mesoporous graphitized carbon nitride nanosphere comprises:

[0070] Pre-oxidize the wet wipes with dilute nitric acid with a concentration of 2M at 60°C for 1 hour to obtain pre-oxidized biomass fibers;

[0071] Weigh 0.2g pre-oxidized biomass fiber and 1.5g thiourea, and disperse in 20mL H 2 O, then hydrothermally treated at 100°C for 24h, and finally dried at 80°C for 5h to obtain a white solid, that is, a wet tissue fiber loaded with thiourea.

[0072] The white solid was placed in an air atmosphere, heated to 550°C at a rate of 5°C / min, and then kept at 550°C for 2h to obtain carbon-doped graphitized carbon nitride nanospheres.

[0073] The XRD spectrum of the carbon-doped graphitized carbon nitride nanospheres provided by the present embodiment is as follows: Figure 1A , Figure 1B As shown, the SEM pattern is as Figure 2A , Fig...

Embodiment 2

[0078] This embodiment provides a carbon-doped mesoporous graphitized carbon nitride nanosphere, the preparation method of the carbon-doped mesoporous graphitized carbon nitride nanosphere comprises:

[0079] Pre-oxidize the paper towels with dilute nitric acid with a concentration of 2M at 60°C for 1 hour to obtain pre-oxidized biomass fibers;

[0080] Weigh 0.2g pre-oxidized biomass fiber, 1.5g thiourea and 1.5g dicyandiamide, and disperse in 16mL H 2 O and 4 mL of ethanol, then hydrothermally treated at 100 °C for 2 days, and finally vacuum-dried at 80 °C for 5 h to obtain a white solid that is a wet tissue fiber loaded with thiourea and dicyandiamide.

[0081] The white solid was placed in an air atmosphere, heated to 500°C at a rate of 2°C / min, and then kept at 500°C for 4h to obtain carbon-doped graphitized carbon nitride nanospheres.

Embodiment 3

[0083] This embodiment provides a carbon-doped mesoporous graphitized carbon nitride nanosphere, the preparation method of the carbon-doped mesoporous graphitized carbon nitride nanosphere comprises:

[0084] Pre-oxidize the carbon cloth with dilute nitric acid with a concentration of 2M at 60°C for 1 hour to obtain pre-oxidized biomass fibers;

[0085] Weigh 0.2g preoxidized biomass fiber, 1.5g thiourea and 1.5g dicyandiamide, and disperse in 10mL H 2 O and 10 mL of ethanol, then hydrothermally treated at 100 °C for 2 days, and finally vacuum-dried at 80 °C for 5 h to obtain a white solid that is a wet tissue fiber loaded with thiourea and dicyandiamide.

[0086] The white solid was placed in an air atmosphere, heated up to 600°C at a rate of 15°C / min, and then kept at 600°C for 2h to obtain carbon-doped graphitized carbon nitride nanospheres.

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Abstract

The invention provides a carbon-doped mesoporous graphitized carbon nitride nanosphere and its preparation method and application. The preparation method of the carbon-doped mesoporous graphitized carbon nitride nanospheres includes: pre-oxidizing biomass fibers to generate hydroxyl and carboxyl functional groups on the mineral acid surface; and combining the pre-oxidized biomass fibers with graphitized nitrogen. The precursor of carbonized carbon is dispersed in a solvent and subjected to solvothermal or hydrothermal treatment to obtain product A; the product A is calcined to obtain the carbon-doped mesoporous graphitized carbon nitride nanospheres. The carbon-doped mesoporous graphitized carbon nitride nanospheres can be used in catalyst carriers and electrodes. The present invention adopts a simple method of first mixing pre-oxidized biomass fiber and graphitized carbon nitride precursor, subjecting it to solvothermal or hydrothermal treatment to achieve dispersion and then roasting, to prepare a product with narrow pore size distribution, extremely high dispersion and Conductive carbon-doped mesoporous graphitized carbon nitride nanospheres.

Description

technical field [0001] The invention belongs to the technical field of doping modification of semiconductor materials, and relates to a carbon-doped mesoporous graphitized carbon nitride nanosphere and a preparation method and application thereof. Background technique [0002] Graphitized carbon nitride (g-C 3 N 4 ), as a non-metallic organic polymer semiconductor, is widely used in environmental protection, organic synthesis, photocatalysis, catalyst carrier, electrochemistry, etc. due to its good chemical stability, easy preparation, low cost, and moderate band gap. Many fields. However, graphitized carbon nitride has the characteristics of easy aggregation, poor dispersion, and high electrical resistance, which severely limits the further application of graphitized carbon nitride in the field of catalyst supports and electrochemistry. Therefore, it is particularly important to research and develop the preparation method of graphitized carbon nitride with excellent meso...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/24B01J32/00B01J35/08B01J37/12B01J37/08B82Y30/00B82Y40/00C25B1/04
CPCB01J27/24B82Y30/00B82Y40/00B01J37/12B01J37/08C25B1/04C25B11/095B01J35/33B01J35/612B01J35/51B01J35/613B01J35/39B01J35/633B01J35/647Y02E60/36
Inventor 杨英李泽霖顾林郝世杰
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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