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 preparation method of an ion filling graphite phase carbon nitride nanosheet. The preparation method mainly comprises three steps of (1) calcination precursor preparation including nitrogen source dissolution and dispersion, nitrogen source and hydrogen chloride combination for generating precursor and precursor drying; (2) precursor sealed calcination; (3) calcination product post-treatment. The preparation method has the advantages that the raw materials are cheap and can be easily obtained; the process is simple; the green and environment-friendly effects are achieved; the industrial production is easy, and the like. Compared with ordinary g-C3N4, the ion filling g-C3N4 nanosheet prepared by the method has the advantages that the energy band gap is low; the photogenerated charge pair separation efficiency is obviously improved; better photooxidation NO removal performance is shown in visible light; after the nanosheet is used for many times, the original photocatalytic activity can be still maintained; high stability is realized.

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
CPCB01D53/8628B01J27/24B01J35/004
Inventor 曾玉彬陈东董国辉王传义
Owner WUHAN UNIV
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