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Porous tubular C3N4 photocatalyst and preparation method thereof

A photocatalyst, C3N4 technology, applied in the field of photocatalytic materials, can solve the problems of high cost and harsh preparation conditions, and achieve the effects of cheap raw materials, reduced product cost, and simple process

Inactive Publication Date: 2018-12-18
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] At present, the literature has reported about the preparation of porous tubular C 3 N 4 The method is mainly the template method, although this method can synthesize porous tubular structure C 3 N 4 materials, but there are disadvantages of harsh preparation conditions, high cost and the need to use toxic and harmful chemical reagents

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  • Porous tubular C3N4 photocatalyst and preparation method thereof
  • Porous tubular C3N4 photocatalyst and preparation method thereof
  • Porous tubular C3N4 photocatalyst and preparation method thereof

Examples

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Embodiment 1

[0033] A porous tubular C 3 N 4 Photocatalyst, the preparation method of described photocatalyst comprises the steps:

[0034]Weigh 2.0g melamine and place it in a round-bottomed flask, then add 90mL of acetic acid aqueous solution with a concentration of 2% (v / v), 5% (v / v), and 8% (v / v), and place the round-bottomed flask Put it into an oil bath, heat and reflux at a constant temperature of 100°C for 60 minutes; then pour the solution in the round bottom flask into a polytetrafluoroethylene liner while it is still hot, put it into a stainless steel water heater, and heat it at a constant temperature of 180°C for 10 hours. Cool the hot kettle naturally, centrifuge the dispersion liquid in the liner, wash the precipitate, dry and grind, and the product is the supramolecular precursor; put the supramolecular precursor prepared above in the crucible, in the nitrogen atmosphere in the tube furnace Calcination at low temperature, from room temperature to 520 ° C, the heating rate...

Embodiment 2

[0037] A porous tubular C 3 N 4 Photocatalyst, the preparation method of described photocatalyst comprises the steps:

[0038] Weigh 2.0g of melamine and place it in a round bottom flask, then add 40mL of 0.1% (v / v) acetic acid aqueous solution, put the round bottom flask in an oil bath, heat and reflux at a constant temperature of 50°C for 5 minutes; Pour the solution in the round-bottomed flask into a polytetrafluoroethylene liner, put it into a stainless steel hydrothermal kettle, heat it at a constant temperature of 120°C for 8 hours, wait for the hydrothermal kettle to cool naturally, centrifuge the dispersion in the inner tank, and wash the precipitate , dry and grind, and the product is the supramolecular precursor; put the above-prepared supramolecular precursor in a crucible, calcinate it in a nitrogen atmosphere in a tube furnace, and raise the temperature from room temperature to 450°C with a heating rate of 1°C·min -1 , at 450°C for 1 hour, after natural cooling,...

Embodiment 3

[0040] A porous tubular C 3 N 4 Photocatalyst, the preparation method of described photocatalyst comprises the steps:

[0041] Weigh 2.0 g of melamine and place it in a round bottom flask, then add 400 mL of 50% (v / v) acetic acid aqueous solution, put the round bottom flask in an oil bath, heat and reflux at a constant temperature of 150°C for 300 minutes; Pour the solution in the round bottom flask into a polytetrafluoroethylene liner, put it into a stainless steel hydrothermal kettle, heat at a constant temperature of 200°C for 16 hours, wait for the hydrothermal kettle to cool naturally, centrifuge the dispersion in the inner tank, and wash the precipitate , dried and ground, and the product is the supramolecular precursor; the supramolecular precursor prepared above was placed in a crucible, calcined in a nitrogen atmosphere in a tube furnace, and the temperature was raised from room temperature to 550°C with a heating rate of 8°C·min -1 , at a constant temperature of 55...

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Abstract

The invention discloses a porous tubular C3N4 photocatalyst. A preparation method of the porous tubular C3N4 photocatalyst comprises the following steps: (1) dispersing melamine in an acetic acid aqueous solution and performing a heating reflux reaction; (2) placing the solution, obtained by the heating reflux reaction, in a hydrothermal kettle for carrying out a hydrothermal reaction; (3) puttingan intermediate product, obtained by the hydrothermal reaction, into a calcination vessel, and calcining in a nitrogen atmosphere so as to obtain the porous tubular C3N4 photocatalyst. The porous tubular C3N4 photocatalyst having a one-dimensional hollow structure and a rich porous structure is prepared by adopting a molecular self-assembly method; the photocatalyst provided by the invention hasgood photocatalytic degradation performance for pollutants.

Description

technical field [0001] The invention relates to the technical field of photocatalytic materials, in particular to a method for preparing porous tubular C by combining hydrothermal reaction and calcination treatment. 3 N 4 photocatalytic method. Background technique [0002] g-C 3 N 4 (g-C 3 N 4 marked C 3 N 4 ) is a new type of non-metallic semiconductor visible light photocatalyst, which can be used in photolysis of water to produce hydrogen, degrade pollutants, and photoreduce CO 2 It has good application value in antibacterial and other aspects. However, bulk C prepared by traditional polycondensation 3 N 4 The small specific surface area and low quantum efficiency lead to poor photocatalytic activity. Porous Tubular C 3 N 4 It is a kind of micro-nano hierarchical structure material, which has the advantages of one-dimensional hollow and porous structure, which can effectively improve the material's response ability and scattering ability to the spectrum, acc...

Claims

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Application Information

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IPC IPC(8): B01J27/24B01J35/10
CPCB01J27/24B01J35/60B01J35/39
Inventor 徐婧王周平
Owner JIANGNAN UNIV
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