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Sodium doped graphite phase carbon nitride prepared by one-step synthesis and application thereof

A graphite phase carbon nitride and sodium doping technology, which is applied in nitrogen compounds, inorganic chemistry, chemical instruments and methods, etc., can solve the problems of complex process and high energy consumption, and achieve simple process, high efficiency and high-efficiency production method Effect

Active Publication Date: 2017-04-26
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, graphite phase carbon nitride modification is subject to more and more researches, such as phosphorus-doped graphite phase carbon nitride visible light catalyst prepared by Wang Desong et al. (CN 103769213A); sulfur-doped graphite phase nitrogen catalyst prepared by Feng Leiyu et al. Carbonization visible photocatalyst; Wang Zonghua etc. (104891997A) preparation method of graphite phase carbon nitride / molybdenum sulfide composite material Guo Feng (DOI: 10.1039 / C6TA03424A) etc. The sodium-doped carbon nitride prepared by ball milling method should be in argon Calcination, complex process, high energy consumption

Method used

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  • Sodium doped graphite phase carbon nitride prepared by one-step synthesis and application thereof
  • Sodium doped graphite phase carbon nitride prepared by one-step synthesis and application thereof
  • Sodium doped graphite phase carbon nitride prepared by one-step synthesis and application thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Weigh 8g of melamine with an electronic balance and put it into the ball mill jar, weigh 2g of sodium bicarbonate into the ball mill jar, add 10g of balls with a diameter of 4mm and 20g of balls with a diameter of 1cm, then tighten the ball mill jar and put it on the ball mill , set the rotating speed of 150r ball mill for 8h. After the ball milling is completed, put the ball abrasive into the alumina dry bed and cover it, raise the temperature in the muffle furnace to 550°C at 4°C / min, keep it for 4h, cool the furnace to room temperature, and take out the products with a volume fraction of 3%. Nitric acid deionized water and ethanol were washed twice, and then dried in a constant temperature drying oven at 60°C. After drying, it was taken out and ground, and sample 1 was marked and stored for subsequent testing.

[0035] The performance test of the prepared sodium-doped graphite-phase carbon nitride catalyst for visible light is as follows: add 10 mg of the prepared ca...

Embodiment 2

[0037] Weigh 10g of melamine with an electronic balance and put it into the ball mill, weigh 2g of sodium bicarbonate and put it into the ball mill, add 10g of balls with a diameter of 4mm and 20g of balls with a diameter of 1cm, then tighten the ball mill and put it on the ball mill , set the rotating speed of 150r ball mill for 8h. After the ball milling is completed, put the ball abrasive into the alumina dry bed and cover it, raise the temperature in the muffle furnace to 550°C at 4°C / min, keep it for 4h, cool the furnace to room temperature, and take out the products with a volume fraction of 3%. Nitric acid deionized water and ethanol were washed twice, and then dried in a constant temperature drying oven at 60 degrees Celsius. After drying, it was taken out and ground, marked as sample 2, and stored for subsequent testing.

[0038] The performance test of the prepared sodium-doped graphite-phase carbon nitride catalyst for visible light is as follows: add 10 mg of the p...

Embodiment 3

[0040] Weigh 14g of melamine with an electronic balance and put it into the ball mill, weigh 2g of sodium bicarbonate and put it into the ball mill, add 14g of balls with a diameter of 4mm and 28g of balls with a diameter of 1cm, then tighten the ball mill and put it on the ball mill , set the rotating speed of 150r ball mill for 8h. After the ball milling is completed, put the ball abrasive into the alumina dry bed and cover it, raise the temperature in the muffle furnace to 550°C at 4°C / min, keep it for 4h, cool the furnace to room temperature, and take out the products with a volume fraction of 3%. Nitric acid deionized water and ethanol were washed twice, and then dried in a constant temperature drying oven at 60 degrees Celsius. After drying, it was taken out and ground, marked as sample 4, and stored for subsequent testing. The specific surface area of ​​sample 4 is 7m 2 / g. The molar ratio of sodium to nitrogen in the finished product is 0.059:1.

[0041]The performa...

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Abstract

The invention belongs to the technical field of semiconductor photocatalysis, and particularly relates to a sodium doped graphite phase carbon nitride prepared by one-step synthesis and application thereof. The preparation method comprises the steps of placing melamine and sodium hydrogen carbonate into a ball milling agitator for ball-milling for 8 hours, taking out the mixture, placing the mixture in a alumina crucible with lid for calcination to acquire a solid, washing the solid with 3% salpeter solution, deionized water and ethanol for three times, then drying and grinding to acquire the sodium doped graphite phase carbon nitride. The preparation method has the advantages of being low in material cost, simple in processing process, and high in preparation efficiency. The prepared sodium doped graphite phase carbon nitride has a decreased forbidden band gap. The photocatalytic degradation speed of organic dye RhB is increased by leaps and bounds.

Description

technical field [0001] The invention belongs to the technical field of semiconductor photocatalysis, and specifically relates to a sodium-doped graphite-phase carbon nitride prepared by one-step synthesis and an application thereof. Background technique [0002] Ultraviolet rays account for a very small proportion (3%) of sunlight, so finding and synthesizing highly efficient catalyst materials induced by visible light has always been an important topic in the field of photocatalysis. Graphite carbon nitride is a new type of visible light catalytic semiconductor material that has been widely studied in recent years. Graphite carbon nitride has potential application prospects in photocatalysis, heterogeneous catalysis, carbon dioxide reduction, fuel cells, etc., which has attracted extensive attention of scientific researchers. However, due to the limitation of its structure and forbidden band width (2.7ev), the graphite phase carbon nitride absorbs visible light within 460n...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24C01B21/082C02F1/30C02F101/30
CPCC01B21/0828C02F1/30B01J27/24C02F2305/10C02F2101/30B01J35/39
Inventor 潘军马永进刘一边渊
Owner CENT SOUTH UNIV
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