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Potassium-doped carbon nitride composite bismuth oxybromide photocatalysis material and preparation method thereof

A photocatalytic material, potassium hydroxide technology, applied in the field of preparation of K-g-C3N4/BiOBr photocatalyst, can solve the problems of poor adsorption of pollutants, low utilization rate of solar energy, easy recombination of photogenerated carriers, etc., and achieve improved degradation efficiency , good performance, safe and simple operation method

Inactive Publication Date: 2020-02-04
QILU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the BiOBr monomer has good photocatalytic activity, it still has the disadvantages of low solar energy utilization, poor adsorption of pollutants, and easy recombination of photogenerated carriers.

Method used

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  • Potassium-doped carbon nitride composite bismuth oxybromide photocatalysis material and preparation method thereof
  • Potassium-doped carbon nitride composite bismuth oxybromide photocatalysis material and preparation method thereof
  • Potassium-doped carbon nitride composite bismuth oxybromide photocatalysis material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] (1) A certain amount of urea is ultrasonically dissolved in potassium hydroxide solution, and then the above mixed solution is dissolved at 80 o Dry in an oven at C;

[0028] (2) Calcining urea containing potassium hydroxide at a certain temperature to finally obtain yellow powder K-g-C 3 N 4 .

[0029] (3) Add K-g-C to deionized water 3 N 4 , and perform ultrasonic treatment to obtain a uniformly dispersed suspension;

[0030] (4) Add bismuth source and bromine source in the suspension of step (3), stir;

[0031] (5) Heat the suspension in step (4) in a water bath, wash and dry the reacted mixture to obtain 20K-g-C 3 N 4 / BiOBr photocatalytic material;

[0032] In the above-mentioned method, the potassium hydroxide solution concentration described in step (1) is 0.5 mol / L, and consumption is 10 mL, and the consumption of urea is 15 g.

[0033] In the above method, the calcining temperature described in step (2) is 550 o C, the calcination time is 4 h, the hea...

Embodiment 2

[0038] (1) A certain amount of urea is ultrasonically dissolved in potassium hydroxide solution, and then the above mixed solution is dissolved at 80 o Dry in an oven at C;

[0039] (2) Calcining urea containing potassium hydroxide at a certain temperature to finally obtain yellow powder K-g-C 3 N 4 .

[0040] (3) Add K-g-C to deionized water 3 N 4 , and perform ultrasonic treatment to obtain a uniformly dispersed suspension;

[0041] (4) Add bismuth source and bromine source in the suspension of step (3), stir;

[0042] (5) Heat the suspension in step (4) in a water bath, wash and dry the reacted mixture to obtain K-g-C 3 N 4 / BiOBr photocatalytic material;

[0043] In the above-mentioned method, the potassium hydroxide solution concentration described in step (1) is 0.5 mol / L, and consumption is 10 mL, and the consumption of urea is 15 g.

[0044] In the above method, the calcining temperature described in step (2) is 550 o C, the calcination time is 4 h, the heating...

Embodiment 3

[0049] (1) A certain amount of urea is ultrasonically dissolved in potassium hydroxide solution, and then the above mixed solution is dissolved at 80 o Dry in an oven at C;

[0050] (2) Calcining urea containing potassium hydroxide at a certain temperature to finally obtain yellow powder K-g-C 3 N 4 .

[0051] (3) Add K-g-C to deionized water 3 N 4 , and perform ultrasonic treatment to obtain a uniformly dispersed suspension;

[0052] (4) Add bismuth source and bromine source in the suspension of step (3), stir;

[0053] (5) Heat the suspension in step (4) in a water bath, wash and dry the reacted mixture to obtain K-g-C 3 N 4 / BiOBr photocatalytic material;

[0054] In the above-mentioned method, the potassium hydroxide solution concentration described in step (1) is 0.5 mol / L, and consumption is 10 mL, and the consumption of urea is 15 g.

[0055] In the above method, the calcining temperature described in step (2) is 550 o C, the calcination time is 4 h, the heati...

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Abstract

The invention discloses a K-g-C3N4 / BiOBr photocatalysis material, and a preparation method and an application thereof. The composite photocatalysis material is characterized in that the K-g-C3N4 / BiOBrphotocatalysis material is prepared through thermal polycondensation and in-situ growth methods by using bismuth nitrate pentahydrate, hexadecyltrimethylammonium bromide, potassium hydroxide and ureaas main raw materials. The photocatalysis activity of the prepared K-g-C3N4 / BiOBr catalyst is tested by using a xenon lamp as a simulated light source and rhodamine B as a simulated pollutant. The composite photocatalyst effectively inhibits photo-induced electron-hole compounding through the doping of alkali metal and the construction of heterojunction, so that the photocatalysis degradation efficiency is improved. The catalyst has the advantages of simplicity in preparation, low cost, no toxicity and the like, and can be widely applied to the fields of sewage treatment and the like, and thepreparation method of the composite photocatalyst provides a new idea for the preparation of a novel photocatalyst, and has a wide prospect in the field of development of new energy by efficiently utilizing solar energy.

Description

technical field [0001] The present invention relates to a kind of K-g-C 3 N 4 The invention relates to a preparation method of BiOBr photocatalyst, which specifically belongs to the technical field of photocatalysis. Background technique [0002] With the continuous development of human society and the continuous advancement of science and technology, while people are obtaining convenience, environmental pollution and energy depletion have become two major problems facing mankind. Domestic sewage and industrial sewage are discharged in large quantities and cannot be treated in a timely and efficient manner, which is one of the reasons for the current shortage of water resources. Photocatalytic technology has broad prospects in solving environmental pollution and resource shortage. [0003] In the 1970s, Japanese scientists first developed TiO 2 The research on photolysis of water opened the prelude to the era of photocatalysis. Semiconductor photocatalysts can absorb an...

Claims

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Application Information

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IPC IPC(8): B01J27/24B01J35/00C02F1/30C02F101/38
CPCB01J27/24B01J23/04C02F1/30C02F2101/38B01J35/39Y02A20/212
Inventor 杜毅曲俊男
Owner QILU UNIV OF TECH
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