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Preparation method of porphyrin/carbon nitride layer-by-layer composite structure photocatalytic nano-composite material

A nanocomposite material and composite structure technology are applied in the field of preparation of porphyrin/carbon nitride layer-by-layer composite structure photocatalytic nanocomposite materials, and can solve the problem that the increase of carbon nitride specific surface area and the carbon nitride charge transport cannot be achieved at the same time. and separation efficiency increase, to achieve the effects of excellent charge transport and separation efficiency, inhibition of recombination, and increase of specific surface area

Inactive Publication Date: 2020-04-07
PINGDINGSHAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The pertinence of these preparation methods is different, and none of them can simultaneously achieve the purpose of increasing the specific surface area of ​​carbon nitride, improving the charge transport and separation efficiency of carbon nitride, and increasing the absorption and utilization of carbon nitride for visible light.

Method used

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  • Preparation method of porphyrin/carbon nitride layer-by-layer composite structure photocatalytic nano-composite material
  • Preparation method of porphyrin/carbon nitride layer-by-layer composite structure photocatalytic nano-composite material

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Embodiment 1

[0025] A preparation method of a porphyrin / carbon nitride layer-by-layer composite structure photocatalytic nanocomposite material, comprising the following steps:

[0026]Step 1: Take 1g of melamine and dissolve melamine and glycerol phosphatidylcholine in 60ml of deionized water at a molar ratio of melamine and glycerol phosphatidylcholine of 1:1.38, then keep stirring for 15 minutes until completely dissolved to obtain a mixed solution; then mix The solution was placed in a polytetrafluoroethylene-lined hydrothermal kettle, hydrothermally reacted at 180°C for 10 hours, and then centrifuged. After centrifugation, it was washed 3 times with deionized water and dried at 60°C for 12 hours to obtain a solid;

[0027] Step 2: Add 0.02g of KOH to the solid to obtain a solid mixture; then take carbon fiber according to the mass ratio of solid to carbon fiber 0.01:1 and mechanically mix it with the solid mixture as raw material, place it in a 500mL corundum crucible and cover it , a...

Embodiment 2

[0031] A preparation method of a porphyrin / carbon nitride layer-by-layer composite structure photocatalytic nanocomposite material, comprising the following steps:

[0032] Step 1: Take 1g of melamine and dissolve melamine and glycerol phosphatidylcholine in 80ml of deionized water at a molar ratio of melamine and glycerol phosphatidylcholine of 1:1.58, then keep stirring for 30min until completely dissolved to obtain a mixed solution; then mix The solution was placed in a polytetrafluoroethylene-lined hydrothermal kettle, hydrothermally reacted at 200°C for 15 hours, and then centrifuged. After centrifugation, it was washed 4 times with deionized water and dried at 70°C for 11 hours to obtain a solid;

[0033] Step 2: Add 0.05g of KOH to the solid to obtain a solid mixture; then take carbon fiber according to the mass ratio of solid to carbon fiber 0.018:1 and mechanically mix it with the solid mixture as a raw material, then place it in a 500mL corundum crucible and cover it ...

Embodiment 3

[0039] A preparation method of a porphyrin / carbon nitride layer-by-layer composite structure photocatalytic nanocomposite material, comprising the following steps:

[0040] Step 1: Take 1g of melamine and dissolve melamine and glycerol phosphatidylcholine in 120ml of deionized water at a molar ratio of 1:2.56 to melamine and glycerol phosphatidylcholine, then keep stirring for 60min until completely dissolved to obtain a mixed solution; then mix The solution was placed in a polytetrafluoroethylene-lined hydrothermal kettle, subjected to a hydrothermal reaction at 240°C for 24 hours, and then centrifuged. After centrifugation, it was washed 5 times with deionized water and dried at 100°C for 10 hours to obtain a solid;

[0041] Step 2: Add 0.1g of KOH to the solid to obtain a solid mixture; then take carbon fiber according to the mass ratio of solid to carbon fiber 0.025:1 and mechanically mix it with the solid mixture as raw material, then place it in a 500mL corundum crucible ...

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Abstract

The invention discloses a preparation method of a porphyrin / carbon nitride layer-by-layer composite structure photocatalytic nano-composite material. The preparation method comprises the following steps: taking and dissolving melamine and L-alpha glycerylphosphorylcholine in deionized water, carrying out a hydrothermal reaction in a hydrothermal kettle, centrifuging the obtained solution, and washing and drying the obtained reaction product to obtain a solid; adding KOH and a carbon fiber into the solid, performing mixing, putting the obtained mixture into a crucible, putting the crucible intothe resonant cavity of a microwave oven, and performing vacuum heating to obtain a heated product; cooling the heated product to room temperature, and washing, drying and grinding the cooled heated product to obtain a carbon nitride powder; dissolving the carbon nitride powder into anhydrous ethanol to obtain a solution A; adding TCPP into anhydrous ethanol to prepare a solution B; adding the solution B into the solution A to obtain a mixed solution C; and continuously stirring the mixed solution C until the solvent is completely volatilized, and performing drying to obtain the porphyrin / carbon nitride layer-by-layer composite structure photocatalytic nano-composite material. The specific surface area of carbon nitride can be increased, the charge transmission and separation efficiency ofcarbon nitride is improved, and absorption and utilization of carbon nitride on visible light are improved.

Description

technical field [0001] The invention belongs to the technical field of material chemistry, and relates to a preparation method of a porphyrin / carbon nitride layer-by-layer composite structure photocatalytic nanocomposite material. Background technique [0002] At present, with the increasingly serious environmental problems and the continuous increase in the use of fossil energy, solving the current environmental pollution problem and developing clean energy have become the focus of people's attention. Solar energy is inexhaustible, and the use of solar energy to split water to produce hydrogen has become an ideal model for the production of clean energy. Since Wang Xinchen’s research group [Wang X, Maeda K, Thomas A, et al.A metal-free polymeric photocatalyst for hydrogen production from waterundervisible light[J].Nature materials,2009,8(1):76.] was the first to discover graphite phase carbon nitride (g-C 3 N 4 ) can be used for photocatalytic decomposition of water to pr...

Claims

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Application Information

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IPC IPC(8): B01J31/02B01J35/10B01J37/10
CPCB01J31/0271B01J31/0244B01J37/10B01J35/39B01J35/61
Inventor 杨柳青商叶曹可生马威王俊青李松田李青彬韩永军
Owner PINGDINGSHAN UNIVERSITY
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