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Method for preparing porous graphite-phase carbon nitride material

A technology of phase carbon nitride and porous graphite, which is applied in the field of preparation of porous graphite phase carbon nitride materials, can solve the problems of inhibiting catalytic activity and small specific surface area, and achieve low-cost raw materials, large specific surface area, and simple preparation process Effect

Inactive Publication Date: 2016-01-27
NANJING INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

g-C prepared by traditional method 3 N 4 The small specific surface area inhibits its catalytic activity

Method used

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  • Method for preparing porous graphite-phase carbon nitride material
  • Method for preparing porous graphite-phase carbon nitride material
  • Method for preparing porous graphite-phase carbon nitride material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Embodiment 1 (comparative embodiment) Prepare g-C 3 N 4

[0027] Weigh 5g of melamine and put it into a ceramic crucible (cover the crucible lid), heat up to 500°C in a muffle furnace at 50°C / min, keep it roasted at this temperature for 1h, then quickly heat up to 520°C within 5min, and heat-preserve and roast 1h, cooled and ground to obtain a yellow powder sample.

[0028] With the material prepared in Example 1, after X-ray diffractometer scanning, see figure 1 , for g-C 3 N 4 .

Embodiment 2

[0029] Example 2 Preparation of Porous p-g-C 3 N 4

[0030] Such as Figure 6 Shown, a kind of preparation method of porous graphite phase carbon nitride material comprises the following steps:

[0031] (1) Dissolve 20g of melamine in 300ml of deionized water at 80°C, stir for 1.5h, and cool to room temperature;

[0032] (2) Add 20ml of HCl solution with a concentration of 10mol / L dropwise into the solution in step (1), and stir for 1h;

[0033] (3) Dry the mixture obtained in step (2) in an oven at 60°C for 20 hours to obtain a white powder;

[0034] (4) Put the white powder obtained in step (3) into a muffle furnace for calcination. The calcination process is to rapidly raise the temperature to 470°C and keep the temperature for 3 hours; 3 N 4 Material.

[0035] With the material prepared in embodiment 2, after X-ray diffractometer scanning, see figure 1 , prepared p-g-C 3 N 4 and g-C prepared by common method (Example 1) 3 N 4 Same, with graphite-like structur...

Embodiment 3

[0037] Example 3 Preparation of Porous p-g-C 3 N 4

[0038] Such as Figure 6 Shown, a kind of preparation method of porous graphite phase carbon nitride material comprises the following steps:

[0039] (1) Dissolve 40g of melamine in 600ml of deionized water at a temperature of 100°C, stir for 1 hour, and cool to room temperature;

[0040] (2) Add 40ml of HCl solution with a concentration of 12mol / L dropwise into the solution in step (1), and stir for 1h;

[0041] (3) Dry the mixture obtained in step (2) in an oven at 80°C for 12 hours to obtain a white powder;

[0042] (4) Put the white powder obtained in step (3) into a muffle furnace for calcination. The calcination process is to rapidly raise the temperature to 450°C and keep the temperature for 4 hours; 3 N 4 Material.

[0043] The p-g-C prepared in embodiment 3 3 N 4 material, observed by scanning electron microscopy, see image 3 , the prepared material is p-g-C with both layered structure and pore structure ...

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Abstract

The invention discloses a method for preparing a porous graphite-phase carbon nitride material. The method includes the following steps that melamine is placed in hot deionized water to be stirred till the melamine is dissolved; after the mixture is cooled to be at the indoor temperature, a HCl aqueous solution is dripped, and white precipitate is formed by stirring; after the product is dried, porous graphite-phase carbon nitride (p-g-C3N4) is obtained through calcination. The graphite-phase carbon nitride material prepared through the method is of a porous structure, and a good catalytic effect is achieved on thermal decomposition of ammonium perchlorate. According to the preparation method, the raw materials can be obtained easily, the process is simple, and product cost is lowered to a great extent; the method is suitable for industrialized mass production, and wide application prospects are achieved in the field of energetic materials.

Description

technical field [0001] The present invention relates to a kind of porous graphite phase carbon nitride (p-g-C 3 N 4 ) material preparation method, which belongs to the field of material preparation and energetic materials. Background technique [0002] Graphite-like carbon nitride (g-C 3 N 4 ) is the most stable allotrope in carbon nitride, which has an obvious layered structure and has good application prospects in biology, catalysis and energy storage. Studies have shown that the catalytic effect of materials is closely related to their specific surface area. For example, Su et al [SuFZ, etal.CatalysisScience&Technology, 2012,2,1005] used nitrile amine as precursor to prepare carbon nitride with high specific surface area, and deprotonated it with tBuOK and KOH solution. Condensation reaction and transesterification reaction showed high catalytic activity. g-C prepared by traditional method 3 N 4 The small specific surface area inhibits its catalytic activity. Por...

Claims

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Application Information

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IPC IPC(8): C01B21/082
Inventor 谈玲华徐建华郏永强杭祖圣寇波吴琼陈宇李志豪
Owner NANJING INST OF TECH
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