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Method for preparing graphite phase carbon nitride material with monatomic layer structure

A single atomic layer, unit structure technology, applied in organic chemistry and other directions, can solve the problems of expensive raw materials, complicated preparation process, etc., and achieve the effect of simple preparation method, uniform size and thickness distribution, and high purity

Active Publication Date: 2013-08-07
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Although by preparing mesoporous g-C 3 N 4 and g-C 3 N 4 Nanotubes, nanowires and other methods can increase their specific surface area and increase the active sites of catalytic reactions, but the preparation process is complicated and the raw materials used are expensive

Method used

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  • Method for preparing graphite phase carbon nitride material with monatomic layer structure
  • Method for preparing graphite phase carbon nitride material with monatomic layer structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] With dicyandiamide as raw material and isopropanol as dispersant, g-C with monoatomic layer structure 3 N 4 The preparation method of the material is as follows:

[0025] The first step takes by weighing 5g dicyandiamide and packs it into a covered ceramic crucible, and the crucible is placed in a muffle furnace;

[0026] The second step is to raise the muffle furnace from room temperature to 400 o C, and keep warm for 4 hours, the heating rate is controlled to 5 o C / min, naturally cool to room temperature after calcination;

[0027] In the third step, the calcined sample is ground into powder in an agate mortar, and 0.5 g of the ground powder is weighed and transferred to an open ceramic crucible;

[0028] The fourth step is to place the open ceramic crucible in the muffle furnace at 400 o Calcined for 5 hours at C, and the heating rate was controlled at 5 o C / min, naturally cool to room temperature after calcination;

[0029] In the fifth step, 50 mg of the sam...

Embodiment 2

[0032] With melamine as raw material and isopropanol as dispersant, g-C with monoatomic layer structure 3 N 4 The preparation method of the material is as follows:

[0033] The first step takes by weighing 5g melamine and packs into the ceramic crucible with cover, and the crucible is placed in the muffle furnace;

[0034] The second step is to raise the muffle furnace from room temperature to 600 o C, and keep warm for 4 hours, the heating rate is controlled to 5 o C / min, naturally cool to room temperature after calcination;

[0035] In the third step, the calcined sample is ground into powder in an agate mortar, and 0.5 g of the ground powder is weighed and transferred to an open ceramic crucible;

[0036] The fourth step is to place the open ceramic crucible in the muffle furnace at 600 o Calcined at C for 3 hours, the heating rate was controlled at 5 o C / min, naturally cool to room temperature after calcination;

[0037] In the fifth step, 50 mg of the sample obtain...

Embodiment 3

[0040] Using dicyandiamide as raw material and methanol as dispersant has a single atomic layer structure g-C 3 N 4 The preparation method of the material is as follows:

[0041] The first step takes by weighing 5g dicyandiamide and packs it into a covered ceramic crucible, and the crucible is placed in a muffle furnace;

[0042] The second step is to raise the muffle furnace from room temperature to 750 o C, and keep warm for 4 hours, the heating rate is controlled to 5 o C / min, naturally cool to room temperature after calcination;

[0043] In the third step, the calcined sample is ground into powder in an agate mortar, and 0.5 g of the ground powder is weighed and transferred to an open ceramic crucible;

[0044] The fourth step is to place the open ceramic crucible in the muffle furnace, at 800 o C for 1 hour, the heating rate is controlled at 5 o C / min, naturally cool to room temperature after calcination;

[0045] The fifth step is to take 50 mg of the sample obtai...

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Abstract

The invention belongs to the field of material preparation and relates to a method for preparing a graphite phase carbon nitride (g-C3N4) material with a monatomic layer structure. The method is characterized in that the prepared g-C3N4 with the monatomic layer structure has the thickness of less than 0.6 nm. The method comprises the following steps of: placing a triazine unit-containing compound serving as a raw material into a muffle furnace, calcining at 400 to 750 DEG C and naturally cooling; porphyrizing the obtained sample and calcining at 400 to 800 DEG C; and ultrasonically stripping the sample which is subjected to secondary calcination into a polar solvent which is a dispersing agent to finally obtain the g-C3N4 with the monatomic layer structure. The method has the advantages that the preparation method is simple; the test result is slightly influenced by human factors in a preparation process; expensive equipment and chemical reagents are not needed in the preparation process; the prepared g-C3N4 with the monatomic layer has large specific surface area and can provide more active sites for catalytic reaction; and the prepared g-C3N4 with the monatomic layer structure is uniform in size and thickness distribution and high in purity.

Description

technical field [0001] The present invention relates to a kind of graphitic phase carbon nitride (g-C) with monoatomic layer structure 3 N 4 ) material preparation method, which belongs to the field of material preparation. Background technique [0002] g-C 3 N 4 It has been widely studied in photocatalysis, electrocatalysis and organic oxygenation dehydrogenation reactions, which is due to the high bond energy C-N covalent bonds in which g-C 3 N 4 Stable chemical properties; high-abundance C and N elements in nature are g-C 3 N 4 Synthesis provides inexpensive starting materials; g-C 3 N 4 It does not contain metal elements and is a green, environment-friendly catalytic material. However, currently the bulk g-C 3 N 4 The larger grain size and smaller specific surface area of ​​the material lead to lower catalytic efficiency. Therefore, regulation of g-C 3 N 4 The morphology is of great significance to promote its practical application in the field of catalysis...

Claims

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Application Information

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IPC IPC(8): C07D487/22
Inventor 全燮赵焕新于洪涛陈硕
Owner DALIAN UNIV OF TECH
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