Mesoporous graphite-like phase carbon nitride material as well as preparation method and application thereof

A graphite-phase carbon nitride and mesoporous technology, applied in chemical instruments and methods, nitrogen compounds, nitrogen and non-metallic compounds, etc., can solve the problems of inability to obtain specific surface area products and limited increase in product specific surface area, and achieve low cost , The preparation method is simple, and the effect of increasing the specific surface area

Active Publication Date: 2020-05-15
ANHUI UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although the specific surface area of ​​this product has been improved, there are deficiencies in both the product and its preparation method. First, the nano-flakes formed by the product only exist on the surface of the massive graphite-like phase carbon nitride, and it is impossible to obtain large-scale graphitic-like carbon nitride. Graphite phase carbon nitride nanoflakes make the specific surface area of ​​the product limited, only 52.9m 2 / g; secondly, the preparation method can not obtain the product with larger specific surface area

Method used

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  • Mesoporous graphite-like phase carbon nitride material as well as preparation method and application thereof
  • Mesoporous graphite-like phase carbon nitride material as well as preparation method and application thereof
  • Mesoporous graphite-like phase carbon nitride material as well as preparation method and application thereof

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Embodiment 1

[0036] The concrete steps of preparation are:

[0037] Step 1, according to the weight ratio of cyanuric acid, cyanuric chloride and organic solvent is 2:4:10, the three are mixed and stirred for 20 minutes; wherein, the organic solvent is acetonitrile to obtain a mixed solution.

[0038] Step 2, drying the mixed solution at 60°C to obtain a precursor.

[0039] In step 3, heat the precursor at 580°C for 20 minutes; wherein, the temperature rise rate of the precursor from room temperature to the heating temperature is 8°C / min, and the approximate figure 1 shown, and as figure 2 with image 3 Mesoporous graphitic phase carbon nitride material shown in the curve.

Embodiment 2

[0041] The concrete steps of preparation are:

[0042] Step 1, according to the weight ratio of cyanuric acid, cyanuric chloride and organic solvent is 2.5:3.5:10, the three are mixed and stirred for 25 minutes; wherein, the organic solvent is acetonitrile to obtain a mixed solution.

[0043] Step 2, drying the mixed solution at 70°C to obtain a precursor.

[0044] Step 3, heat the precursor at 593°C for 17.5min; wherein, the temperature rise rate of the precursor from room temperature to the heating temperature is 9°C / min, and the obtained figure 1 shown, and as figure 2 with image 3 Mesoporous graphitic phase carbon nitride material shown in the curve.

Embodiment 3

[0046] The concrete steps of preparation are:

[0047] Step 1, according to the weight ratio of cyanuric acid, cyanuric chloride and organic solvent is 3:3:10, the three are mixed and stirred for 30 minutes; wherein, the organic solvent is acetonitrile to obtain a mixed solution.

[0048] Step 2, drying the mixed solution at 80°C to obtain a precursor.

[0049] Step 3, heat the precursor at 605°C for 15 minutes; wherein, the temperature rise rate of the precursor from room temperature to the heating temperature is 10°C / min, and the following figure 1 shown, and as figure 2 with image 3 Mesoporous graphitic phase carbon nitride material shown in the curve.

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Abstract

The invention discloses a mesoporous graphite-like phase carbon nitride material as well as a preparation method and application thereof. The material is characterized in that graphite-like phase carbon nitride nanosheets with mesopores are in a cross-linking accumulation state, wherein the sheet thickness of the nanosheets is 8-12 nm, the pore diameter of the mesopores is 2-20 nm, and the specific surface area of the graphite-like phase carbon nitride nanosheets with mesopores in the cross-linking accumulation state is larger than or equal to 456.3 m<2>/g. The method adopts a high-temperaturesynthesis method and comprises the steps: mixing and stirring cyanuric acid, cyanuric chloride and an organic solvent to obtain a mixed solution, drying the mixed solution to obtain a precursor, andheating the precursor at the temperature of 580-630 DEG C to obtain the target product. The material has a large specific surface area and high performance of photocatalytic decomposition of water forhydrogen production, and can be easily and widely commercially applied to the field of photocatalytic hydrogen production.

Description

technical field [0001] The present invention relates to a carbon nitride material and its preparation method and use, in particular to a mesoporous graphite phase carbon nitride material and its preparation method and use. Background technique [0002] As a metal-free photocatalytic material, graphite-like carbon nitride has attracted much attention because of its excellent photocatalytic performance and can be used for photocatalytic hydrogen production. At present, people have made unremitting efforts to obtain graphite-like carbon nitride materials, such as the title "Facile one step method realizing scalable production of g-C 3 N 4 nanosheets and study of their photocatalytic H 2 evolution activity", J.Mater.Chem.A, 2014, 2, 18924 ("a simple method to prepare g-C 3 N 4 Nanosheets achieve efficient photocatalytic hydrogen production", "Journal of Materials Chemistry" 2014 No. 2 No. 18924) article. The graphite-like phase carbon nitride (g-C 3 N 4 ) The thickness of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B21/082C01B3/04B01J27/24B01J35/10B82Y40/00
CPCC01B21/0605C01B3/042B01J27/24B01J35/1019B01J35/1061B01J35/004B82Y40/00C01P2004/24C01P2004/64C01P2006/16C01P2006/12Y02E60/36
Inventor 袁玉鹏胡少年杜海威朱储红
Owner ANHUI UNIVERSITY
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