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Method for efficiently preparing graphene-like carbon nitride

A technology of ene carbon nitride and graphite, which is applied in the field of synthesis of graphene-like carbon nitride, can solve the disadvantages of rapid acquisition and further promotion and application of graphene-like carbon nitride, and the small specific surface area of ​​graphene-like carbon nitride , The preparation efficiency and effect are not ideal, etc., to achieve the effect of rapid and uniform heat treatment, controllable structure and properties, and rapid and efficient preparation

Active Publication Date: 2017-03-29
ZHANGJIAGANG DONGDA IND TECH RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But this method technology is more loaded down with trivial details, and preparation cycle is longer, although this method tries to improve synthesis effect by synthesizing ionic liquid, the specific surface area of ​​the obtained graphene-like carbon nitride is still relatively small
[0023] Several methods mentioned above generally have shortcomings such as long cycle, complicated process, high cost and unfriendly environment, and the preparation efficiency and effect are not ideal, which is not conducive to the rapid acquisition and further popularization and application of graphene-like carbon nitride. Therefore, the development A fast, efficient, environmentally friendly, and low-cost new method for preparing high-performance graphene-like carbon nitride is of great significance for realizing industrialized mass production

Method used

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  • Method for efficiently preparing graphene-like carbon nitride
  • Method for efficiently preparing graphene-like carbon nitride

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] After mixing 10g of melamine and 0.2g of polypropylene-based carbon fiber, put it into a ceramic crucible. Then place the ceramic crucible in the resonant cavity of an industrial high-energy microwave oven and evacuate to 5kPa, set the microwave power to 5kW, and start to keep warm after the temperature reaches 570°C, turn off the microwave oven after 5min, let the reaction system cool down to room temperature with the furnace, and then take out the sample . It can be seen that there is a large amount of light yellow powder in the crucible, that is, graphene-like carbon nitride, the yield is about 54wt%, and the specific surface area is 307m 2 / g.

[0046] figure 1 The transmission electron micrograph of the obtained product shows that the product has an obvious layered structure with a thickness of about 4 layers. figure 2 It is an atomic force microscope picture of the obtained product. It can be seen from the figure that the thickness of the obtained graphene-lik...

Embodiment 2

[0048] After mixing 10g of melamine and 0.4g of polypropylene-based carbon fiber, put it into a ceramic crucible. Then place the ceramic crucible in the resonant cavity of an industrial high-energy microwave oven and evacuate it to 10kPa, set the microwave power to 4kW, and keep warm after the temperature reaches 500°C, turn off the microwave oven after 15 minutes, let the reaction system cool down to room temperature with the furnace, and then take out the sample . It can be seen that there is a large amount of light yellow powder in the crucible, that is, graphene-like carbon nitride, the yield is about 44wt%, and the specific surface area is 183m 2 / g, the sheet thickness is about 8 layers.

Embodiment 3

[0050] After mixing 10g of dicyandiamide and 0.5g of polypropylene-based carbon fiber, put it into a ceramic crucible. Then place the ceramic crucible in the resonant cavity of an industrial high-energy microwave oven and evacuate it to 15kPa; set the microwave power to 6kW, keep warm after the temperature reaches 600°C, turn off the microwave oven after 10min, let the reaction system cool down to room temperature with the furnace, and then take out the sample . It can be seen that there is a large amount of light yellow powder in the crucible, that is, graphene-like carbon nitride, the yield is about 49wt%, and the specific surface area is 209m 2 / g, the sheet thickness is about 6 layers.

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Abstract

The present invention provides a method for efficiently preparing graphene-like carbon nitride. The method is characterized by comprising: using a nitrogen-rich organic matter as a raw material, adding a microwave absorbing agent, mixing, placing into a ceramic crucible, placing the crucible into the center of an industrial high-energy resonant cavity, vacuumizing, and carrying out high-energy microwave irradiation heating so as to rapidly and efficiently prepare the graphene-like carbon nitride. According to the present invention, the obtained graphene-like carbon nitride has characteristics of high specific surface area, high yield and high purity, and can be used in the fields of degradation of organic matters, hydrogen production through photolysis of water, catalyst carriers, biomedical sensors, and the like.

Description

technical field [0001] The invention relates to the technical category of preparing graphene-like carbon nitride, in particular to a preparation method for rapidly and efficiently synthesizing graphene-like carbon nitride based on high-energy microwave irradiation heating technology. Background technique [0002] Due to the rapid development of industrialization and the rapid increase of population, global resource shortages, environmental pollution and ecological damage have occurred. Semiconductor photocatalysts have shown great potential in solving energy shortages and environmental pollution by directly converting solar energy into chemical energy, thereby realizing photolysis of water to produce hydrogen, or directly degrading organic pollutants. Graphite-like carbon nitride, because of its unique semiconductor energy band structure, excellent chemical stability and good thermal stability, is widely used in the fields of photolysis of water to produce hydrogen, sensors ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B21/082
CPCC01B21/0605C01P2004/04C01P2004/20C01P2006/12C01P2006/80
Inventor 王继刚余永志勾学军周清张浩顾永攀张安蕾
Owner ZHANGJIAGANG DONGDA IND TECH RES INST
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