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A kind of nitrogen-doped graphene/nano titanium dioxide photocatalyst and its preparation method and application

A technology of nitrogen-doped graphene and nano-titanium dioxide, which is applied in the direction of physical/chemical process catalysts, organic compounds/hydrides/coordination complex catalysts, chemical instruments and methods, etc., which can solve unfavorable mass production and high production costs , complex steps and other issues, to achieve the effect of improving photocatalytic activity, improving affinity, and improving adsorption and degradation ability

Active Publication Date: 2022-03-08
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of the methods for preparing nitrogen-doped graphene / titanium dioxide composite photocatalytic materials reported in the literature are hydrothermal methods, which are time-consuming, complicated steps, and high production costs, which are not conducive to mass production.
At present, there are few reports on the application of nitrogen-doped graphene and titanium dioxide composite materials in the degradation of indoor gas phase pollutants.

Method used

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  • A kind of nitrogen-doped graphene/nano titanium dioxide photocatalyst and its preparation method and application
  • A kind of nitrogen-doped graphene/nano titanium dioxide photocatalyst and its preparation method and application
  • A kind of nitrogen-doped graphene/nano titanium dioxide photocatalyst and its preparation method and application

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Experimental program
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Effect test

Embodiment 1

[0070] First, disperse 1g of titanium dioxide in 40ml of deionized water, stir thoroughly to obtain a suspension of titanium dioxide, then place the suspension on a stirring table, add 500 μl of hydrochloric acid solution with a concentration of 37% dropwise while stirring, adjust the pH to 2, and then add 10ml Graphene oxide aqueous solution with a mass fraction of 1 mg / ml. Adjust the temperature of the stirring table to 100°C, and stir while heating until the water is completely volatilized to obtain a graphene oxide / titanium dioxide composite;

[0071] Dissolve 10mg of dicyandiamide in 20ml of absolute ethanol, and ultrasonically dissolve all of the dicyandiamide; disperse the above 1g of graphene oxide / titanium dioxide composite in absolute ethanol with dicyandiamide, and stir thoroughly for 3 hours to obtain Mix a homogeneous suspension. The suspension was placed in an oven and dried at 80°C to obtain a mixed powder. Put the powder in a suction filtration device, add de...

Embodiment 2

[0076] First, disperse 1g of titanium dioxide in 40ml of deionized water, stir thoroughly to obtain a suspension of titanium dioxide, then place the suspension on a stirring table, add 500 μl of hydrochloric acid solution with a concentration of 37% dropwise while stirring, adjust the pH to 2, and then add 10ml Graphene oxide aqueous solution with a mass fraction of 1 mg / ml. Adjust the temperature of the stirring table to 100°C, and stir while heating until the water is completely volatilized to obtain a graphene oxide / titanium dioxide composite;

[0077] Dissolve 20mg of dicyandiamide in 20ml of absolute ethanol, and ultrasonically dissolve all the dicyandiamide; disperse the above 1g of graphene oxide / titanium dioxide composite in absolute ethanol with dicyandiamide, and fully stir for 3 hours to obtain Mix a homogeneous suspension. The suspension was placed in an oven and dried at 80°C to obtain a mixed powder. Put the powder in a suction filtration device, add deionized ...

Embodiment 3

[0082] First, disperse 1g of titanium dioxide in 40ml of deionized water, stir thoroughly to obtain a suspension of titanium dioxide, then place the suspension on a stirring table, add 500 μl of hydrochloric acid solution with a concentration of 37% dropwise while stirring, adjust the pH to 2, and then add 10ml Graphene oxide aqueous solution with a mass fraction of 1 mg / ml. Adjust the temperature of the stirring table to 100°C, and stir while heating until the water is completely volatilized to obtain a graphene oxide / titanium dioxide composite;

[0083] Dissolve 30mg of dicyandiamide in 20ml of absolute ethanol, and ultrasonically dissolve all the dicyandiamide; disperse the above 1g of graphene oxide / titanium dioxide composite in absolute ethanol dissolved in dicyandiamide, and fully stir for 3 hours to obtain Mix a homogeneous suspension. The suspension was placed in an oven and dried at 80°C to obtain a mixed powder. Put the powder in a suction filtration device, add de...

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Abstract

The invention relates to a nitrogen-doped graphene / nano-titanium dioxide photocatalyst and its preparation method and application. The nitrogen-doped graphene / nano-titanium dioxide photocatalyst comprises nitrogen-doped graphene and is supported on nitrogen-doped graphite Titanium dioxide on ene; the nitrogen-doped graphene contains a nitrogen source, and the nitrogen source includes graphitic nitrogen and pyrrole nitrogen; the mass ratio of the nitrogen-doped graphene to titanium dioxide is (0.005-0.05): 1, preferably (0.01~0.02):1.

Description

technical field [0001] The invention relates to a nitrogen-doped graphene / nano-titanium dioxide photocatalyst for degrading indoor VOCs and a preparation method thereof, which is beneficial to the degradation and purification of low-concentration and low-flow organic matter in the air, and belongs to the application field of photocatalytic air purification. Background technique [0002] Indoor air quality has a great impact on people's health, comfort and work efficiency. In recent years, with the prolongation of people's indoor activities (the survey found that people spend more than 90% of their time indoors), indoor air quality has attracted more and more attention (refer to Document 1). However, with the development of society, in consideration of factors such as energy saving and noise control, buildings are now more and more inclined to airtight design, resulting in harmful substances released by decoration materials and furniture coatings, waste gas discharged by huma...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J31/02B01D53/86B01D53/44
CPCB01D53/8687B01J31/0244B01D2257/708B01D2255/802B01D2259/4508B01J35/39
Inventor 孙静代雪萍王焱谢晓峰王晓陆冠宏饶泽鹏曾庆龙
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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