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Preparation method of carbon nitride nanosheets and application

A nanosheet and carbon nitride technology, which is applied in the field of photodegradable material preparation, can solve the problems of cumbersome process and complicated preparation process of carbon nitride nanosheets, and achieves the effects of simple method, good promotion value and good performance.

Inactive Publication Date: 2019-10-18
徐少晨
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Although the above methods can realize the preparation of carbon nitride nanosheets, they must first prepare bulk carbon nitride, and then undergo subsequent peeling and thinning to prepare carbon nitride nanosheets, which makes carbon nitride nanosheets The preparation process is relatively complicated and the process is cumbersome

Method used

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  • Preparation method of carbon nitride nanosheets and application
  • Preparation method of carbon nitride nanosheets and application
  • Preparation method of carbon nitride nanosheets and application

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preparation example Construction

[0032] A preparation method of carbon nitride nanosheets, comprising the following steps:

[0033] (1) Preparation of tablets

[0034] Mix the carbon nitrogen source and metal powder, and press it into a tablet with a diameter of 10-20mm and a thickness of 5mm through a tablet press;

[0035] (2) Heating tablets

[0036] Place the tablet obtained in step (1) in a muffle furnace, blow in nitrogen containing oxygen, and raise the temperature to 400-480°C at a heating rate of 3-5°C / min to keep the reaction for 2-4h;

[0037] (3) Broken tablets

[0038] After the reaction, take out the reacted tablet, grind it fully with a mortar, remove impurities in an acidic solution, and then wash it three times with water and alcohol solution in sequence to obtain the target carbon nitride nanosheet.

Embodiment 1

[0040]First, weigh 10g of urea and 1g of iron powder, mix them evenly, and then press them into tablets with a diameter of 10mm and a thickness of 5mm on a tablet press under a pressure of 15MPa, and place all the pressed tablets on the bottom of the crucible in turn , do not cover the crucible lid, and then pass in nitrogen gas containing 0.2V% oxygen for sweeping. After 20 minutes, turn off the gas, set the temperature program of the tube furnace, and raise the temperature from room temperature to 420°C at a heating rate of 3.5°C / min. After setting the temperature, keep it warm for 3 hours; then, cut off the power supply, let the reaction product cool down to room temperature naturally with the tube furnace, take out the reaction product, use a mortar to grind and grind, and finally, soak the grinded product in hydrochloric acid solution to remove After three times of alternating washing with water and alcohol, and drying, the carbon nitride nanosheets can be obtained. After ...

Embodiment 2

[0042] First, take 8g of dicyandiamide and 1g of iron powder, mix them evenly, and then press them into tablets with a diameter of 10mm and a thickness of 5mm on a tablet press under a pressure of 15MPa. The bottom of the crucible is not covered with the crucible lid, and then nitrogen gas containing 0.3V% oxygen is passed in for sweeping. After 15 minutes, the gas is turned off, and the temperature of the tube furnace is programmed to rise from room temperature to 440°C at a heating rate of 3.5°C / min. After reaching the set temperature, keep it warm for 3 hours; after that, cut off the power supply, let the reaction product cool down to room temperature naturally with the tube furnace, take out the reaction product, use a mortar to grind and grind, and finally, put the grinded product in hydrochloric acid solution Soak to remove impurities, and then alternately wash with water and alcohol three times, and dry to obtain carbon nitride nanosheets. According to the AFM microscope...

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Abstract

The invention provides a method for directly preparing carbon nitride nanosheets. The method specifically includes the steps that at the high temperature, a carbon and nitrogen source compound can break down to produce ammonia gas, then under the catalysis of iron powder, the ammonia gas is decomposed to produce hydrogen, the hydrogen has a reaction with micro-oxygen in nitrogen to generate water,as an intercalator, the water can directly act on generated blocked carbon nitride, in this way, stripping and thinning of the blocked carbon nitride can be realized, and the process of preparation of the carbon nitride nanosheets can be realized in one step.

Description

technical field [0001] The invention relates to the technical field of preparation of photodegradable materials, in particular to a preparation method and application of a carbon nitride nanosheet material. Background technique [0002] The development and utilization of clean and renewable energy, and the control of environmental pollution, especially organic pollution are currently a hot research field. As early as 1976, Tosine et al. published an article on the decomposition of organic pollutants polychlorinated biphenyls under the catalysis of titanium dioxide, which created a precedent for photocatalytic technology in the field of environmental pollution control. Later, a large number of new visible photocatalyst materials were reported one after another, the most notable of which was the article "A Metal-Free Polymeric Photocatalyst For Hydrogen Production From Water Under Visible Light" published by Wang Xinchen and others in "Nature Materials" in 2009. "In ", the ap...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B21/082B82Y40/00B01J27/24A62D3/17A62D101/20
CPCC01B21/0605B82Y40/00B01J27/24A62D3/17C01P2002/20C01P2004/20C01P2002/72C01P2004/04C01P2002/84A62D2101/20B01J35/39
Inventor 徐少晨王子韩张亮
Owner 徐少晨