Cerium oxide, graphene quantum dots and graphene-like phase carbon nitride composite photoactivate material and preparation method thereof

A graphene quantum dot, olefin phase carbon nitride technology, applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve the problems of low utilization rate of solar energy, photocatalytic activity needs to be further improved, etc. , to achieve the effect of high efficiency of electron migration, high synthesis yield and purity, and good experimental repeatability

Inactive Publication Date: 2016-03-16
青岛双创石墨烯科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] At this stage, most of the semiconductor photocatalytic materials developed and developed by people can only absorb ultraviolet light, which accounts for less than 5% of the solar spectrum reaching the earth, and the utilization rate of solar energy is low.
[0006] Grap...

Method used

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  • Cerium oxide, graphene quantum dots and graphene-like phase carbon nitride composite photoactivate material and preparation method thereof
  • Cerium oxide, graphene quantum dots and graphene-like phase carbon nitride composite photoactivate material and preparation method thereof
  • Cerium oxide, graphene quantum dots and graphene-like phase carbon nitride composite photoactivate material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] (1) Weigh 12 grams of melamine and 0.5 g of cerium oxalate, add them to an agate mortar and grind them evenly, then add them into an alumina crucible with a capacity of 25 ml, and put them in a muffle furnace at 610°C for 4 hours to obtain Pale yellow graphene-like carbon nitride embedded with cerium oxide;

[0022] (2) The synthesis of nitrogen-doped graphene quantum dots is as follows: take 0.8 g of citric acid and 0.65 g of urea and dissolve them in 15 ml of deionized water. Keep the temperature in a drying oven for 8 hours, cool to normal temperature to obtain a uniformly dispersed nitrogen-doped graphene quantum dot solution; take 2 milliliters of nitrogen-doped graphene quantum dot solution and disperse it in 30 milliliters of deionized water, and obtain solution A after ultrasonication;

[0023] (3) Dissolve 0.1 g of the graphene-like carbon nitride obtained in step (1) in 10 ml of water, ultrasonicate for 1 hour, then slowly add solution A, and stir for 15 hours...

Embodiment 2

[0026] (1) Weigh 13 grams of melamine and 0.5 g of cerium oxalate, add them to an agate mortar and grind them evenly, then add them to an alumina crucible with a capacity of 25 ml, and put them in a muffle furnace at 660°C for 2 hours to obtain Pale yellow graphene-like carbon nitride embedded with cerium oxide;

[0027] (2) The synthesis of nitrogen-doped graphene quantum dots is as follows: take 0.9 g of citric acid and 0.95 g of urea and dissolve them in 20 ml of deionized water. Keep the temperature in a drying oven for 12 hours, cool to normal temperature to obtain a uniformly dispersed nitrogen-doped graphene quantum dot solution; take 3 milliliters of nitrogen-doped graphene quantum dot solution and disperse it in 30 milliliters of deionized water, and obtain solution A after ultrasonication;

[0028] (3) Dissolve 0.5 g of graphene-like carbon nitride obtained in step (1) in 20 ml of water, ultrasonicate for 5 hours, then slowly add solution A, and stir for 20 hours at ...

Embodiment 3

[0031] (1) Weigh 12 grams of melamine and 0.3 g of cerium oxalate, add them into an agate mortar and grind them evenly, then add them into an alumina crucible with a capacity of 25 ml, and put them in a muffle furnace at 650°C for 3 hours to obtain Pale yellow graphene-like carbon nitride embedded with cerium oxide;

[0032] (2) The synthesis of nitrogen-doped graphene quantum dots is as follows: Take 0.8 g of citric acid and 0.7 g of urea and dissolve them in 20 ml of deionized water. Keep the temperature in a drying oven for 10 hours, cool to normal temperature to obtain a uniformly dispersed nitrogen-doped graphene quantum dot solution; take 2 milliliters of nitrogen-doped graphene quantum dot solution and disperse it in 30 milliliters of deionized water, and obtain solution A after ultrasonication;

[0033] (3) Dissolve 0.2 g of the graphene-like carbon nitride obtained in step (1) in 10 ml of water, ultrasonicate for 3 hours, then slowly add solution A, and stir for 15 ho...

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Abstract

The invention provides a cerium oxide, graphene quantum dots and graphene-like phase carbon nitride composite photoactivate material and a preparation method thereof. The composite photoactivate material is formed by embedding cerium oxide into a graphene-like phase carbon nitride layer structure and loading the nitrogen-doped graphene quantum dots onto graphene-like phase carbon nitride. According to the composite photoactivate material, by use of doping of the nitrogen-doped graphene quantum dots, the photoresponse range of the graphene-like phase carbon nitride is expanded; through the quick photoproduction electron and hole separation effect and the electronic migration capability among the nitrogen-doped graphene quantum dots, cerium oxide and graphene-like phase carbon nitride, the composite photoactivate material has an efficient photocatalytic activity.

Description

technical field [0001] The invention relates to a cerium oxide / graphene quantum dot / graphene-like phase carbon nitride composite photocatalytic material and a preparation method thereof, belonging to the technical field of photocatalyst preparation. Background technique [0002] At this stage, most of the semiconductor photocatalytic materials developed and developed by people can only absorb ultraviolet light, which accounts for less than 5% of the solar spectrum reaching the earth, and the utilization rate of solar energy is low. Therefore, finding and synthesizing highly efficient, stable, and low-cost visible photocatalytic materials is the key to the research of solar water splitting for hydrogen production. [0003] In recent years, the photocatalytic activity of composite materials with inorganic non-metallic structure has attracted the attention of researchers. Studies have found that inorganic non-metallic semiconductor materials have special energy band structures...

Claims

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Application Information

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IPC IPC(8): B01J27/24A62D3/10A62D101/26A62D101/28
CPCA62D3/10A62D2101/26A62D2101/28B01J27/24B01J35/004
Inventor 吴滨
Owner 青岛双创石墨烯科技有限公司
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