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A kind of preparation method of ion-filled graphite phase carbon nitride nanosheet

A graphite-phase carbon nitride and nanosheet technology, which is applied in separation methods, chemical instruments and methods, and dispersed particle separation, etc., can solve the problems of limited availability of photocatalytic reactions, increased energy band gap of nanosheets, limited application of nanosheets, etc. problem, to achieve the effect of eliminating the quantum size effect, reducing the energy band gap, and good photooxidative NO removal performance

Active Publication Date: 2021-04-02
WUHAN UNIV
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Problems solved by technology

g-C due to the quantum confinement effect of the nanosheet structure 3 N 4 The increased energy bandgap of the nanosheets adversely affects spectral response and photoexcitation, while surface recombination of photogenerated charge pairs limits the availability of subsequent photocatalytic reactions
Due to these two inherent defects, g-C 3 N 4 Nanosheets have very limited practical applications in solar energy conversion

Method used

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  • A kind of preparation method of ion-filled graphite phase carbon nitride nanosheet
  • A kind of preparation method of ion-filled graphite phase carbon nitride nanosheet
  • A kind of preparation method of ion-filled graphite phase carbon nitride nanosheet

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Embodiment 1

[0029] A, with 2g analytical pure melamine (C 3 N 6 h 6 ) Add the solid powder into 100mL of deionized water heated in a water bath at 80°C, and at the same time, magnetically stir to accelerate the dissolution. After the solution is clarified, stop heating and stirring, and let it cool naturally;

[0030]b. When the clear solution obtained in step a is cooled until white crystals begin to precipitate, start stirring and slowly add 1 mL of concentrated hydrochloric acid (HCl) with a mass fraction of 37% to the solution dropwise to obtain a mixed solution;

[0031] c. Heating the mixed solution obtained in step b at 80°C for 30 minutes, and then drying it in a blast drying oven at 120°C for 24 hours to obtain white crystals;

[0032] d. Put the white crystal obtained in step c into a sealed 100mL calciner after careful grinding, continue to heat up to 520°C at a heating rate of 20°C / min, and calcine at a constant temperature of 520°C for 4 hours, and obtain a light yellow sol...

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Abstract

The invention provides a method for preparing ion-filled graphite phase carbon nitride nanosheets. The preparation method is mainly divided into three steps: (1) Preparation of calcined precursor, including dissolution and dispersion of nitrogen source, and combining nitrogen source and hydrogen chloride to generate precursor. Drying of materials and precursors; (2) Sealed calcination of precursors; (3) Post-processing of calcined products. The preparation method has the advantages of cheap and easily available raw materials, simple process, green and environmentally friendly, and easy industrial production. Ion-filled g-C prepared by the method of the present invention 3 N 4 Nanosheets, compared to ordinary g‑C 3 N 4 The energy band gap is lower, the photogenerated charge significantly improves the separation efficiency, and it shows good photo-oxidation removal performance of NO under visible light. After repeated use, it can still maintain the original photocatalytic activity and has very good stability. sex.

Description

technical field [0001] The invention belongs to the technical field of preparation of photocatalytic nanomaterials and treatment of environmental pollutants, and in particular relates to an ion-filled graphite phase carbon nitride (g-C 3 N 4 ) Preparation methods and applications of nanosheets. Background technique [0002] Nitrogen oxides (NO x ) is the general term for compounds composed of nitrogen and oxygen, including nitric oxide (NO), nitrogen dioxide (NO 2 ), nitrogen trioxide (N 2 o 3 ) and other forms, is one of the main pollutants in the atmosphere. NO emissions from human activities x Among them, NO accounts for more than 90%. NO x It can cause many physical diseases such as bronchitis, emphysema, neurasthenia and paralysis, as well as environmental pollution such as acid rain, photochemical smog, ozone layer destruction, greenhouse effect, and urban smog. According to the data released by the Ministry of Environmental Protection of China, in recent year...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/24B01D53/86B01D53/56
CPCB01D53/8628B01J27/24B01J35/39
Inventor 曾玉彬陈东董国辉王传义
Owner WUHAN UNIV
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