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Preparation method of silver-doped two-dimensional graphite phase carbon nitride composite photocatalyst

A graphite-phase carbon nitride and silver-doped technology, applied in physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve problems such as difficult removal and stripping of sulfate radicals, and easy preparation conditions The effect of control, simple preparation method and high catalytic efficiency

Inactive Publication Date: 2016-05-11
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The sulfate group in the post-treatment process of the former is difficult to remove, and the latter is difficult to completely immerse the ions in the precursor of the reaction into the interior of carbon nitride, resulting in g-C 3 N 4 hard to peel off

Method used

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  • Preparation method of silver-doped two-dimensional graphite phase carbon nitride composite photocatalyst
  • Preparation method of silver-doped two-dimensional graphite phase carbon nitride composite photocatalyst
  • Preparation method of silver-doped two-dimensional graphite phase carbon nitride composite photocatalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] (1) Pretreatment of thermal decomposition precursors

[0020] Dissolve 0.035g of silver nitrate in 2.8g of water, slowly add 7g of ammonium chloride and 3.5g of melamine under constant stirring, stir at room temperature for 20min, heat to 80°C, and keep stirring for 60min to completely volatilize the water.

[0021] (2) Silver / two-dimensional g-C 3 N 4 Preparation of Composite Photocatalyst

[0022] Add the mixture of ammonium chloride, melamine and silver nitrate dried in step (1) into a semi-closed crucible, put it into a muffle furnace, react at 400°C for 4 hours, close the muffle furnace, and grind to obtain the product.

Embodiment 2

[0024] (1) Pretreatment of thermal decomposition precursors

[0025] Dissolve 0.42g of silver nitrate in 3.5g of ethanol, slowly add 7g of ammonium chloride and 4.2g of melamine under constant stirring, stir at room temperature for 60min, heat to 100°C, and keep stirring for 30min until the ethanol is completely volatilized.

[0026] (2) Silver / two-dimensional g-C 3 N 4 Preparation of Composite Photocatalyst

[0027] Add the mixture of ammonium chloride, melamine and silver nitrate dried in step (1) into a semi-closed crucible, put it into a muffle furnace, react at 450°C for 6 hours, close the muffle furnace, and grind to obtain the product.

[0028] 1. Silver / two-dimensional g-C 3 N 4 Performance Determination of Composite Photocatalyst

[0029] Adopt Japanese JSM-6360A type scanning electron microscope to observe the silver / two-dimensional g-C that embodiment 1 prepares 3 N 4 The morphology of the composite photocatalyst, the scanning electron microscope picture is a...

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Abstract

The invention relates to a preparation method of a silver-doped two-dimensional graphite phase carbon nitride composite photocatalyst. The preparation method includes the steps of pretreatment of a thermolysis precursor and preparation of the silver-doped two-dimensional carbon nitride composite photocatalyst. The preparation method has the advantages that the preparation method is simple, the preparation condition is easy to control, the prepared silver-doped two-dimensional lamellar carbon nitride composite photocatalyst is an environment-friendly high-performance catalyst, contamination is avoided, catalysis efficiency is high, and certain application value is achieved.

Description

technical field [0001] The invention belongs to the technical field of nanomaterial preparation and application, and relates to a method for preparing a silver-doped two-dimensional graphite phase carbon nitride composite photocatalyst. Background technique [0002] Graphite carbon nitride (g-C 3 N 4 ) is a non-metallic organic polymer semiconductor material. Due to its narrow band gap (Eg=2.70ev), it shows high catalytic activity in photocatalysis, and has stable chemical properties, large specific surface area, etc. It has great potential application in the field of photocatalytic sewage treatment. [0003] At present, the preparation methods of graphitic carbon nitride mainly include thermal condensation polymerization synthesis, solvothermal synthesis, solid phase synthesis and vapor phase chemical deposition. The most commonly used method is thermal condensation polymerization of raw materials such as pyrolysis of urea, thiourea, cyanamide, and melamine, but the grap...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24
CPCB01J27/24B01J35/39
Inventor 李忠玉金杰王冠球梁倩徐松
Owner CHANGZHOU UNIV
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