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Graphite-phase carbon nitride composite photocatalyst and preparation method thereof

A technology of graphite phase carbon nitride and photocatalyst, which is applied in the direction of physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc. Carbon nitride and other semiconductors are evenly mixed to achieve the effect of improving separation efficiency, improving photocatalytic performance, and improving mixing uniformity

Active Publication Date: 2017-05-31
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, graphitic carbon nitride is difficult to dissolve, and the existing methods cannot mix graphitic carbon nitride with other semiconductors evenly when forming a composite, which limits the improvement of photocatalytic performance.

Method used

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  • Graphite-phase carbon nitride composite photocatalyst and preparation method thereof
  • Graphite-phase carbon nitride composite photocatalyst and preparation method thereof
  • Graphite-phase carbon nitride composite photocatalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Concentrated sulfuric acid dissolves graphite phase carbon nitride: Take 0.5g graphite phase carbon nitride and add it to a 25ml round bottom flask, then add 10ml of concentrated sulfuric acid, stir and heat in an oil bath to 100°C, heat for 1h, and wait for graphite phase carbon nitride All dissolved and cooled to room temperature to obtain a concentrated sulfuric acid solution of graphite carbon nitride with a concentration of 50 mg / ml.

[0023] Graphite phase carbon nitride is homogeneously mixed: take 2ml of the concentrated sulfuric acid solution of graphite phase carbon nitride and add 1.2g of thiocyanuric acid to it, so that the sulfur in the finally obtained compound can regulate the graphite phase carbon nitride and graphite phase nitrogen The carbonization ratio is 1:99, the obtained mixture is stirred into a paste with a glass rod, then 30ml of secondary water is added, stirred with an electromagnetic stirrer for 30min, left to stand for 1h, then suction filte...

Embodiment 2

[0026] Concentrated sulfuric acid dissolves graphite phase carbon nitride: Take 1g of graphite phase carbon nitride and add it to a 25ml round bottom flask, then add 10ml of concentrated sulfuric acid, stir in an oil bath and heat to 60°C, heat for 1h, until the graphite phase carbon nitride is completely Dissolve and cool to room temperature to obtain a concentrated sulfuric acid solution of graphite carbon nitride with a concentration of 100 mg / ml.

[0027] Graphite phase carbon nitride is homogeneously mixed: get the concentrated sulfuric acid solution of 1ml graphite phase carbon nitride and add 1.8g thiocyanuric acid to it, so that sulfur regulates the ratio of carbon nitride and carbon nitride in the compound obtained finally to be 1:9, the obtained mixture was stirred into a paste with a glass rod, then 30ml of secondary water was added, stirred with an electromagnetic stirrer for 30min, allowed to stand for 1h, then filtered using a Buchner funnel, and then the sample w...

Embodiment 3

[0030] Concentrated sulfuric acid dissolves graphite phase carbon nitride: Take 1g of graphite phase carbon nitride and add it to a 25ml round bottom flask, then add 10ml of concentrated sulfuric acid, stir and heat in an oil bath to 150°C, heat for 1h, until the graphite phase carbon nitride is completely Dissolve and cool to room temperature to obtain a concentrated sulfuric acid solution of graphite carbon nitride with a concentration of 100 mg / ml.

[0031] Graphite phase carbon nitride is homogeneously mixed: get the concentrated sulfuric acid solution of 1ml graphite phase carbon nitride and add 2.4g thiocyanuric acid to it, so that the ratio of sulfur in the compound obtained finally is adjusted carbon nitride and carbon nitride to be 1:5, stir the obtained mixture into a paste with a glass rod, then add 30ml of secondary water, stir with an electromagnetic stirrer for 30min, let it stand for 1h, then use a Buchner funnel for suction filtration, and then dry the sample. ...

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Abstract

The invention discloses a preparation method of a graphite-phase carbon nitride composite. The preparation method comprises the following steps: mixing graphite-phase carbon nitride with concentrated sulfuric acid, heating and stirring the obtained mixture to completely dissolve the graphite-phase carbon nitride in the concentrated sulfuric acid, adding trithiocyanuric acid into the obtained concentrated sulfuric acid solution of the graphite-phase carbon nitride, sufficiently mixing the substances, adding a poor solvent, separating a settled precipitate, drying the precipitate to obtain a sample, and calcining the dried sample in an inert atmosphere, thereby obtaining the composite comprising the graphite-phase carbon nitride and sulfur conditioned graphite-phase carbon nitride; the composite can be used as a photocatalyst. By adopting the preparation method, the mixing uniformity degree of the graphite-phase carbon nitride composite can be effectively increased, furthermore, the separation efficiency of a photon-generated carrier can be furthermore improved, and thus application of the graphite-phase carbon nitride to photocatalysis is widened.

Description

technical field [0001] The invention relates to the technical field of photocatalysts, in particular to a carbon nitride photocatalyst and a preparation method thereof. Background technique [0002] In today's society, energy and environmental issues are becoming more and more prominent. Traditional energy sources such as oil and coal are non-renewable energy sources, and their reserves are gradually decreasing. The development and utilization of new energy sources has become the focus of attention in today's society. As an inexhaustible clean energy, solar energy has been paid more and more attention by scientific researchers. Among them, the key to utilizing solar energy is to prepare efficient photocatalysts. [0003] Graphite carbon nitride is a non-metallic semiconductor with a band gap of about 2.7eV, which makes it have a certain absorption ability for visible light, and the energy band of graphitic carbon nitride covers the redox potential of water, so that it can O...

Claims

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Application Information

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IPC IPC(8): B01J27/24C01B3/04
CPCC01B3/042B01J27/24C01B2203/1041B01J35/39Y02E60/36
Inventor 湛宗升张袁健沈艳飞
Owner SOUTHEAST UNIV
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