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Preparation method of cerium oxide/graphene quantum dot/graphene-like carbon nitride composite photocatalytic material

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 photocatalytic activity to be further improved, low utilization rate of solar energy, etc. , to achieve the effects of high synthesis yield and purity, high electron mobility, and cheap and easy-to-obtain raw materials.

Inactive Publication Date: 2017-11-24
吴滨
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, most of the semiconductor photocatalytic materials developed and developed by people can only absorb the ultraviolet light that only accounts for less than 5% of the solar spectrum reaching the earth, and the utilization rate of solar energy is low.
[0006] Graphite-like structure (layered graphite phase) carbon nitride (g-C 3 N 4 ) has special semiconductor optical properties similar to graphene, and is used in photocatalytic reactions as a visible light-responsive catalyst, but its photocatalytic activity needs to be further improved

Method used

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  • Preparation method of cerium oxide/graphene quantum dot/graphene-like carbon nitride composite photocatalytic material
  • Preparation method of cerium oxide/graphene quantum dot/graphene-like carbon nitride composite photocatalytic material
  • Preparation method of cerium oxide/graphene quantum dot/graphene-like carbon nitride composite photocatalytic material

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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 preparation method of a cerium oxide / graphene quantum dot / graphene-like carbon nitride composite photocatalytic material. The composite photocatalytic material is formed by inlaying cerium oxide in a graphene-like carbon nitride layered structure, and loading nitrogen-doped graphene quantum dots on the graphene-like carbon nitride. According to the preparation method of the cerium oxide / graphene quantum dot / graphene-like carbon nitride composite photocatalytic material, the photoresponse scope of the graphene-like carbon nitride is extended by doping the nitrogen-doped graphene quantum dots, and the composite photocatalytic material has high-efficiency photocatalysis activity by using rapid photo-generated electron-hole separating effect and electron transfer ability among the nitrogen-doped graphene quantum dots, the cerium oxide and the graphene-like carbon nitride.

Description

technical field [0001] The present invention relates to a method for preparing a cerium oxide / graphene quantum dot / graphene-like phase carbon nitride composite photocatalytic material. The priority number is 201510841674.9, which belongs to the field of photocatalyst preparation technology. Background technique [0002] At present, most of the semiconductor photocatalytic materials developed and developed by people can only absorb the ultraviolet light which only 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 semiconduct...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24A62D3/10A62D101/26A62D101/28
CPCA62D3/10B01J27/24A62D2101/26A62D2101/28B01J35/39
Inventor 吴滨
Owner 吴滨
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