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Synthetic method of low-cost mesoporous graphite-phase carbon nitride

A technology of graphite phase carbon nitride and synthesis method, which is applied in the direction of nitrogen and non-metallic compounds, can solve problems such as difficult to find solvents, and achieve the effects of wide sources, low price and low toxicity

Inactive Publication Date: 2015-02-04
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, it is difficult to find a suitable solvent to disperse dicyandiamine into the pores of the hard template to meet the needs

Method used

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  • Synthetic method of low-cost mesoporous graphite-phase carbon nitride
  • Synthetic method of low-cost mesoporous graphite-phase carbon nitride

Examples

Experimental program
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Effect test

Embodiment 1

[0029] (1) Add 1.5 parts by mass of dicyandiamine to 9 parts by mass of ethylenediamine, and stir at room temperature for 5 minutes to obtain a mixed solution of dicyandiamine and ethylenediamine;

[0030] (2) Drop the mixed solution obtained in step (1) into 1 mass part of SBA-15 powder, and stir for 5 minutes to form a transparent semi-fluid, and then age for 4 hours;

[0031] (3) heat the transparent semi-fluid obtained in step 2 in an oil bath at 90°C, and dry overnight to obtain a blocky orange-yellow solid;

[0032] (4) Grinding the orange-yellow solid obtained in step (3) and roasting it in a tube furnace with a nitrogen atmosphere, the heating program conditions are as follows: from room temperature to 2.5 ° C min -1 The heating rate was raised to 550°C, and then kept at this temperature for 4 hours, and a black solid was obtained after cooling down;

[0033] (5) Disperse the black solid obtained in step (4) in 200 parts by mass of 5wt% HF (~4molL -1 ) in aqueous sol...

Embodiment 2

[0038] (1) Add 2.0 parts by mass of dicyandiamine to 9 parts by mass of ethylenediamine, and stir at room temperature for 8 minutes to obtain a mixed solution of dicyandiamine and ethylenediamine;

[0039] (2) Drop the mixed solution obtained in step (1) into 1 mass part of SBA-15 powder, and stir for 8 minutes to form a transparent semi-fluid, and then age for 6 hours;

[0040] (3) heat the transparent semi-fluid obtained in step 2 in an oil bath at 90°C, and dry overnight to obtain a blocky orange-yellow solid;

[0041] (4) Grinding the orange-yellow solid obtained in step (3) and roasting it in a tube furnace with a nitrogen atmosphere, the heating program conditions are as follows: from room temperature to 2.5 ° C min -1 The heating rate was raised to 550°C, and then kept at this temperature for 4 hours, and a black solid was obtained after cooling down;

[0042] (5) the black solid that step (4) obtains is dispersed in the 5wt% NH of 200 mass parts 4 HF 2 (~4mol L -1 ...

Embodiment 3

[0047] (1) Add 2.5 parts by mass of dicyandiamine to 9 parts by mass of ethylenediamine, and stir at room temperature for 12 minutes to obtain a mixed solution of dicyandiamine and ethylenediamine;

[0048] (2) Drop the mixed solution obtained in step (1) into 1 mass part of SBA-15 powder, and stir for 12 minutes to form a transparent semi-fluid, and then age for 6 hours;

[0049] (3) heat the transparent semi-fluid obtained in step 2 in an oil bath at 90°C, and dry overnight to obtain a blocky orange-yellow solid;

[0050] (4) Grinding the orange-yellow solid obtained in step (3) and roasting it in a tube furnace with a nitrogen atmosphere, the heating program conditions are as follows: from room temperature to 2.5 ° C min -1 The heating rate was raised to 550°C, and then kept at this temperature for 4 hours, and a black solid was obtained after cooling down;

[0051] (5) the black solid that step (4) obtains is dispersed in the 5wt% NH of 200 mass parts 4 HF 2 (~4mol L -...

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Abstract

The invention belongs to the field of inorganic materials and particularly relates to a synthetic method of low-cost mesoporous graphite-phase carbon nitride. The graphite-phase carbon nitride is 3.9-6.14 nm in pore diameter, is 269-715 m<2>g<-1> in specific surface area, is 0.4-0.75 cm<3>g<-1> in pore volume and is in the form of a black powder. The synthetic method includes following steps: impregnating a mesoporous silicon dioxide material into an ethanediamine solution containing dicyanodiamine, stirring the solution, roasting the solution in an inert gas atmosphere, removing a silicon dioxide template, and drying the material to obtain the mesoporous graphite-phase carbon nitride material. Raw materials in the method are low in cost, slight in toxic and wide in sources. Meanwhile, the finally-prepared low-cost mesoporous graphite-phase carbon nitride is high in nitrogen content, specific surface area and pore volume.

Description

technical field [0001] The invention relates to the field of inorganic materials, in particular to a method for synthesizing mesoporous graphite phase carbon nitride with low cost and high specific surface. Background technique [0002] Graphite phase mesoporous carbon nitride (g-CN) is a carbon-containing covalent compound composed of tris-triazine or triazine as the parent structure, bridged by N atoms, and finally stacked in graphite-like form. . g-CN has many special physical and chemical properties, such as semiconductor properties, biocompatibility, low density, special optical and energy storage properties, and alkalinity. At the same time, the N lone pair electrons in the parent structure of g-CN materials are highly conjugated and have a relatively low forbidden band width (~2.7eV). In recent years, g-CN as a new material has been widely used in fuel cells, photocatalysis, heterogeneous catalysis, CO 2 In the field of adsorption and other fields, it is regarded b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B21/082
Inventor 许杰王悦陈婷薛冰李永昕
Owner CHANGZHOU UNIV
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