Preparation method and application of aza fused ring g-C3N4 composite material

A composite material, g-c3n4 technology, applied in the field of preparation of aza-fused ring g-C3N4 composite materials, can solve the problems of high electron and hole recombination rate, low surface area, band bending, etc., and achieves remarkable progress and degradation. The effect of high efficiency and high practicability

Pending Publication Date: 2022-07-22
深圳市绿蔓科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, its disadvantages lie in the phenomenon of energy band bending, high recombination rate of electrons and holes, and low surface area, which limit its application and need to be improved.

Method used

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  • Preparation method and application of aza fused ring g-C3N4 composite material

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Experimental program
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Effect test

Embodiment 1

[0020] see figure 1 , a preparation method of aza-fused ring g-C3N4 composite material, the preparation method of described aza-fused ring g-C3N4 composite material comprises the following steps:

[0021] S1, preparation of g-C 3 N 4 , prepare g-C by direct pyrolysis of 20g melamine in a tube furnace under nitrogen protection atmosphere 3 N 4 , keep it for future use;

[0022] S2, prepare aza-fused ring, add 1 g of cyclohexanone octahydrate and 1.3 g of 1,2,4,5-phenylenetetramine tetrahydrochloride into a round-bottomed flask under nitrogen atmosphere, and then add 0.5 mL of H 2 SO 4 Mixed solution with 100 mL of deoxygenated N-methylpyrrolidone, then the round-bottomed flask was placed in an ice bath and stirred for 2 hours, then transferred to an oil bath and heated to 180°C, followed by a continuous reaction for 8 hours and the device was cooled to room temperature, Water was added to quench the reaction, and then suction filtered to obtain a black solid product, and...

Embodiment 2

[0029] see figure 1 , a preparation method of aza-fused ring g-C3N4 composite material, the preparation method of described aza-fused ring g-C3N4 composite material comprises the following steps:

[0030] S1, preparation of g-C 3 N 4 , prepare g-C by direct pyrolysis of 20g melamine in a tube furnace under nitrogen protection atmosphere 3 N 4 , keep it for future use;

[0031] S2, prepare aza-fused ring, add 1.5g of cyclohexanone octahydrate and 2g of 1,2,4,5-phenylenetetramine tetrahydrochloride into a round-bottomed flask under nitrogen atmosphere, and then add 2mL of H 2 SO 4 Mixed solution with 150 mL of deoxygenated N-methylpyrrolidone, then the round-bottomed flask was placed in an ice bath and stirred for 2 hours, then transferred to an oil bath and heated to 180°C. After continuous reaction for 8 hours, the device was cooled to room temperature. Water was added to quench the reaction, and then suction filtered to obtain a black solid product, and then methanol an...

Embodiment 3

[0038] see figure 1 , a preparation method of aza-fused ring g-C3N4 composite material, the preparation method of described aza-fused ring g-C3N4 composite material comprises the following steps:

[0039] S1, preparation of g-C 3 N 4 , prepare g-C by direct pyrolysis of 20g melamine in a tube furnace under nitrogen protection atmosphere 3 N 4 , keep it for future use;

[0040] S2, prepare aza-fused ring, add 2 g of cyclohexanone octahydrate and 3.3 g of 1,2,4,5-benzenetetramine tetrahydrochloride into a round-bottomed flask under nitrogen atmosphere, and then add 5 mL of H 2 SO 4 Mixed solution with 100 mL of deoxygenated N-methylpyrrolidone, then the round-bottomed flask was placed in an ice bath and stirred for 2 hours, then transferred to an oil bath and heated to 180°C, followed by a continuous reaction for 8 hours and the device was cooled to room temperature, Water was added to quench the reaction, and then suction filtered to obtain a black solid product, and then m...

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Abstract

The invention provides a preparation method and application of an aza-fused ring g-C3N4 composite material, and relates to the technical field of material chemistry, the preparation method of the aza-fused ring g-C3N4 composite material comprises the following steps: S1, preparing g-C3N4: directly pyrolyzing 20g of melamine in a tubular furnace under a nitrogen protection atmosphere to prepare g-C3N4, and preserving for later use; s2, preparing the aza-condensed ring, adding 1g to 3g of cyclohexanehexone octahydrate and 1g to 4g of 1, 2, 4, 5-phenylenetetramine tetrahydrochloride into a round-bottom flask in a nitrogen atmosphere, and then adding a mixed solution of 0.5 mL to 5mL of H2SO4 and 100 mL to 150mL of deoxidized N-methyl pyrrolidone; the photocatalyst is prepared by compounding aza fused rings and g-C3N4, the preparation method comprises the following steps: uniformly mixing g-C3N4 and aza fused rings, and carrying out a hydrothermal reaction to obtain the photocatalyst, and the photocatalyst has excellent formaldehyde photocatalytic degradation capability, is high in degradation efficiency, is environment-friendly, is relatively high in practicability, and is suitable for industrial production. And the progress is obvious.

Description

technical field [0001] The invention relates to the technical field of material chemistry, in particular to a preparation method and application of a nitrogen heterofused ring g-C3N4 composite material. Background technique [0002] Formaldehyde is a colorless and soluble irritant gas. Formaldehyde can be absorbed through the respiratory tract and has a negative impact on human health. At present, the methods for removing formaldehyde in the air mainly include chemical reaction method, photocatalytic reaction method and adsorption method. Each method has its own characteristics in a specific environment. Among them, photocatalytic oxidation technology is a new technology developed rapidly in recent years that can directly utilize solar energy for environmental purification. After continuous research and exploration by predecessors, g-C3N4 has been recognized as a new type of photocatalytic material for water splitting. g-C3N4 has the advantages of low cost, stability, suit...

Claims

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Application Information

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IPC IPC(8): B01J31/02B01D53/00B01D53/86B01D53/72
CPCB01J31/0235B01D53/8668B01D53/007B01D2257/708B01D2259/80B01J35/39
Inventor 张超红
Owner 深圳市绿蔓科技有限公司
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