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A kind of photocatalyst and its preparation method and application

A photocatalyst and carbon nitride technology, applied in the field of photocatalysis, can solve the problems of inability to achieve comprehensive improvement, low light absorption efficiency, poor photocatalytic activity, etc., achieve good environmental protection benefits, solve low specific surface area, large ratio The effect of surface area

Active Publication Date: 2021-05-25
HUNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although element doping alone or building a heterojunction can improve the performance of carbon nitride in a certain aspect, it cannot achieve a comprehensive improvement, such as specific surface area, light absorption performance, electron-hole pair separation, etc.
Therefore, how to comprehensively improve the problems of fast recombination rate of photogenerated electron-hole pairs in graphitic carbon nitride, low specific surface area, low light absorption efficiency, and poor photocatalytic activity is of great significance for expanding the application range of graphitic carbon nitride materials.

Method used

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  • A kind of photocatalyst and its preparation method and application
  • A kind of photocatalyst and its preparation method and application
  • A kind of photocatalyst and its preparation method and application

Examples

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Embodiment 1

[0046] A carbon nitride skeleton photocatalyst modified by monovalent copper ions of the present invention, the carbon nitride skeleton photocatalyst modified by monovalent copper ions uses copper chloride dihydrate as a copper source and melamine as a carbon nitride precursor , with ammonium thiocyanate as reducing agent, prepared by calcining.

[0047] The preparation method of the carbon nitride skeleton photocatalyst modified by the monovalent copper ion of the above-mentioned present embodiment comprises the following steps:

[0048] (1) Weigh 400 mg of copper chloride dihydrate, 250 mg of ammonium thiocyanate and 2 g of melamine in an agate mortar and grind continuously for 30 min to obtain a mixture precursor.

[0049] (2) Place the mixture precursor obtained after uniform grinding in step (1) in a crucible, cover the crucible lid and put it into a muffle furnace for calcination. Control the temperature rise rate of the muffle furnace to 2°C / min. Keep at ℃ for 4h, and ...

Embodiment 2

[0061] A preparation method of a monovalent copper ion-modified carbon nitride skeleton photocatalyst of the present invention is basically the same as the preparation method in Example 1, the only difference being that the quality of ammonium thiocyanate in step (1) is 50 mg. The monovalent copper ion-modified carbon nitride skeleton photocatalyst prepared in Example 2 is named CN-50.

Embodiment 3

[0063] A method for preparing a monovalent copper ion-modified carbon nitride skeleton photocatalyst of the present invention is basically the same as that in Example 1, except that the quality of ammonium thiocyanate in step (1) is 150 mg. The monovalent copper ion-modified carbon nitride skeleton photocatalyst prepared in Example 3 is named CN-150.

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Abstract

The invention "a photocatalyst and its preparation method and application" belongs to the technical field of photocatalysis. The photocatalyst is a carbon nitride skeleton material modified by monovalent copper ions, and has a porous structure. The monovalent copper ion-modified carbon nitride skeleton photocatalyst of the present invention has the advantages of environmental protection, large specific surface area, strong absorption capacity for visible light, fast separation rate of photogenerated charges, high photocatalytic activity, stable chemical properties, and corrosion resistance. The preparation method has the advantages of being simple, easy to operate, easy to obtain raw materials, low in cost, suitable for continuous large-scale batch production, and the like.

Description

technical field [0001] The invention belongs to the technical field of photocatalysis, and in particular relates to a photocatalyst and its preparation method and application. Background technique [0002] In recent years, due to the increasingly prominent problems of energy crisis and environmental pollution, the use of photocatalysts to degrade pollutants in the environment has attracted extensive attention as an environmentally friendly and low-cost technology. At present, the commonly used photocatalyst is titanium dioxide. Although titanium dioxide has the advantages of non-toxicity, high efficiency and low cost, its wide bandgap can only absorb about 4% of the ultraviolet light in sunlight, which greatly limits its application. Therefore, it is very important to develop a photocatalyst or its composite material that can catalyze under visible light, is cheap, and has stable performance. [0003] Carbon Nitride (g-C 3 N 4 ) is a photocatalytic material with visible ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/24B01J35/10B01J37/08C02F1/30C02F101/38
CPCB01J27/24B01J35/004B01J35/1004B01J37/082C02F1/30C02F2101/38C02F2305/10
Inventor 王侯张荆晶袁兴中蒋龙波
Owner HUNAN UNIV