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Preparation method of sheet-shaped g-C3N4 composite petal-shaped BiOBr photocatalytic material

A photocatalytic material, g-c3n4 technology, applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve problems such as low photocatalytic efficiency, achieve good crystallinity, and the method is simple and easy to operate. , the effect of improving the ability to degrade dyes

Inactive Publication Date: 2019-05-31
NANCHANG HANGKONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the lower electron-hole separation rate leads to lower photocatalytic efficiency. Therefore, for g-C 3 N 4 The modification of the

Method used

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  • Preparation method of sheet-shaped g-C3N4 composite petal-shaped BiOBr photocatalytic material
  • Preparation method of sheet-shaped g-C3N4 composite petal-shaped BiOBr photocatalytic material
  • Preparation method of sheet-shaped g-C3N4 composite petal-shaped BiOBr photocatalytic material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] g-C 3 N 4 Preparation of:

[0023] (1) Weigh 2g of melamine and put it into a ceramic crucible, cover the ceramic crucible with a lid, and place it in a tubular heating furnace to raise the temperature to 550°C; the heating rate is 5°C / min, and the heating time is 4h to obtain a light yellow color g-C 3 N 4 (Graphite-like phase C 3 N 4 ), which is ground for later use;

[0024] BiOBr / g-C 3 N 4 Preparation of:

[0025] (2) Weigh 89.75mg of cetyltrimethylammonium bromide and place it in a small beaker, measure 16ml of ethylene glycol with a measuring cylinder and pour it into the beaker, stir for 60min, as solution A; at the same time take 119.25mg of nitric acid pentahydrate Put bismuth in another 50ml small beaker, add 12ml nitric acid (2M), stir for 1h, as solution B; pour solution B into solution A, then weigh 300mg of g-C obtained in step (1) 3 N 4 Add to the mixed solution, ultrasonic 10min;

[0026] (3) Place the suspension obtained in step (2) in a 50m...

Embodiment 2

[0029] g-C 3 N 4 Preparation of:

[0030] (1) is identical with the step (1) of embodiment 1;

[0031] BiOBr / g-C 3 N 4 Preparation of:

[0032] (2) Weigh 359mg of cetyltrimethylammonium bromide and place it in a small beaker, measure 16ml of ethylene glycol with a graduated cylinder and pour it into the beaker, stir for 60min, as solution A; at the same time, take 477mg of bismuth nitrate pentahydrate and put In another 50ml small beaker, add 12ml of nitric acid (2M), stir for 1h, as solution B; pour solution B into solution A, then weigh 300mg of g-C obtained in step (1) 3 N 4 Add to the mixed solution, ultrasonic 10min;

[0033] (3) Place the suspension obtained in step (2) in a 50ml reaction kettle, and react at 160 degrees Celsius for 12h;

[0034](4) After the reaction in step (3) is completed, centrifuge the resulting product to obtain a precipitate, then wash it three times with deionized water and absolute ethanol, and dry the cleaned precipitate in a vacuum dr...

Embodiment 3

[0036] g-C 3 N 4 Preparation of:

[0037] (1) is identical with the step (1) of embodiment 1;

[0038] BiOBr / g-C 3 N 4 Preparation of:

[0039] (2) Weigh 1.436g of cetyltrimethylammonium bromide and place it in a small beaker, measure 16ml of ethylene glycol with a measuring cylinder and pour it into the beaker, stir for 60min, as solution A; at the same time, take 1.9308g of nitric acid pentahydrate Put bismuth in another 50ml small beaker, add 12ml nitric acid (2M), stir for 1h, as solution B; pour solution B into solution A, then weigh 300mg of g-C obtained in step (1) 3 N 4 Add to the mixed solution, ultrasonic 10min;

[0040] (3) Place the suspension obtained in step (2) in a 50ml reaction kettle, and react at 160 degrees Celsius for 12h;

[0041] (4) After the reaction in step (3) is completed, centrifuge the resulting product to obtain a precipitate, then wash it three times with deionized water and absolute ethanol, and dry the cleaned precipitate in a vacuum d...

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Abstract

The invention provides a preparation method of a sheet-shaped g-C3N4 composite petal-shaped BiOBr photocatalytic material(BiOBr / g-C3N4 photocatalytic material). The method comprises the steps of usingcerium nitrate pentahydrate, cetyltrimethylammonium bromide, bismelamine, ethylene glycol and nitric acid (2mol / L)as main raw materials, using solvothermal synthesis to prepare the BiOBr / g-C3N4 photocatalytic material, using an xenon lamp as a light source to simulate sunlight, filtering 420 nanometre ultraviolet light (lambade), and conducting photocatalytic performance testing on the BiOBr / g-C3N4 photocatalytic material; degrading toxicorganic pollutants such as methyl orange, methylene blue, rhodamine B and the like in water to prove that the BiOBr / g-C3N4 photocatalytic material has good photocatalytic properties under visible light. The BiOBr / g-C3N4 photocatalytic material is a composite of a non-metal semiconductor and a hafnium oxyhalide material, a special band structure and good optical properties are the basis of being a photocatalyst, the material has the advantages of being non-toxic, inexpensive and easy to prepare, and the material has broad application prospects in the treatment of the pollutants and the development of new energy sources by using the solar energy.

Description

technical field [0001] The present invention relates to flaked g-C 3 N 4 The invention discloses a preparation method of a composite petal-shaped BiOBr photocatalytic material, specifically belonging to the field of photocatalytic material preparation. Background technique [0002] With the rapid development of industrial technology and people's convenience, more and more domestic sewage and industrial sewage are discharged into rivers. Since entering the 21st century, environmental governance and new energy are two major problems facing mankind. At the same time, solar energy is inexhaustible and inexhaustible, and will be the best energy source that human beings can utilize. [0003] The semiconductor photocatalytic material was discovered for the first time by using TiO 2 Degradation of water to produce hydrogen and oxygen. Since then, semiconductors as photocatalytic materials that can convert sunlight into other energy sources have attracted the attention of a large...

Claims

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Application Information

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IPC IPC(8): B01J27/24C02F1/30C02F101/30
Inventor 谢宇吴俊凌云
Owner NANCHANG HANGKONG UNIVERSITY
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