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G-C3N4 heterojunction-BiOBr loaded activated carbon photocatalytic material and preparation method thereof

A photocatalytic material, g-c3n4 technology, applied in the field of photocatalytic degradation, can solve problems such as single degradation effect, difficult recovery of photocatalyst, secondary pollution of small organic molecules, etc., achieve good conductivity and electron mobility, and promote transmission and migration process, improving the effect of catalytic decomposition range

Pending Publication Date: 2020-01-03
周奇峰
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Aiming at the deficiencies of the prior art, the present invention provides a g-C 3 N 4 The heterojunction-BiOBr-loaded activated carbon photocatalytic material and its preparation method solve the problem that the existing photocatalyst has a single degradation effect, and the degraded organic small molecules are likely to cause secondary pollution, and at the same time solve the problem that the photocatalyst is difficult to recycle. question

Method used

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preparation example Construction

[0026] g-C 3 N 4 Heterojunction composites are FeNi nanoalloys doped with TiO 2 -g-C 3 N 4 The heterojunction composite material, the preparation method includes the following steps:

[0027] (1) Add an appropriate amount of absolute ethanol to the reaction flask, then add dilute acetic acid solution, adjust the pH to 4-5, slowly add tetraisopropyl titanate while stirring at a constant speed, and place the reaction flask in a constant temperature water bath for heating The reaction was stirred at a constant speed of 60-70°C for 3-5h, and then the reaction flask was placed in an ultrasonic processor, the ultrasonic frequency was 20-25KHz, and the ultrasonic dispersion treatment was carried out for 1.5-2h to obtain nano-TiO 2 precursor solution.

[0028] (2) To TiO 2 Add melamine to the precursor solution, the mass ratio of tetraisopropyl titanate and melamine is 1:8-15, and the solution is transferred into a hydrothermal automatic reactor, heated to 90-100 ° C, and stirre...

Embodiment 1

[0033] (1) Preparation of nano-TiO 2 Precursor solution: add an appropriate amount of anhydrous ethanol to the reaction flask, then add dilute acetic acid solution, adjust the pH to 4, slowly add tetraisopropyl titanate while stirring at a constant speed, and place the reaction flask in a constant temperature water bath to heat to The reaction was stirred at a constant speed of 60 °C for 3 hours, and then the reaction flask was placed in an ultrasonic processor, the ultrasonic frequency was 20KHz, and the ultrasonic dispersion treatment was carried out for 1.5 hours to obtain nano-TiO 2 Precursor Solution Component 1.

[0034] (2) Preparation of TiO 2 -g-C 3 N 4 Heterojunction: Towards TiO 2 Melamine was added to the precursor solution component 1, and the mass ratio of tetraisopropyl titanate and melamine was 1:8, and the solution was transferred into a hydrothermal automatic reactor, heated to 90 ° C, and stirred at a uniform speed for 6 hours. In a high-speed centrifug...

Embodiment 2

[0039] (1) Preparation of nano-TiO 2 Precursor solution: add an appropriate amount of anhydrous ethanol to the reaction flask, then add dilute acetic acid solution, adjust the pH to 4, slowly add tetraisopropyl titanate while stirring at a constant speed, and place the reaction flask in a constant temperature water bath to heat to The reaction was stirred at a constant speed of 65 °C for 4 hours, and then the reaction flask was placed in an ultrasonic processor, the ultrasonic frequency was 20KHz, and the ultrasonic dispersion treatment was carried out for 1.5 hours to obtain nano-TiO 2 Precursor Solution Component 2.

[0040] (2) Preparation of TiO 2 -g-C 3 N 4 Heterojunction: Towards TiO 2 Melamine was added to the precursor solution component 2, and the mass ratio of tetraisopropyl titanate and melamine was 1:10, and the solution was transferred into a hydrothermal automatic reactor, heated to 90 ° C, and stirred at a uniform speed for 6 hours. In a high-speed centrifu...

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Abstract

The invention relates to the technical field of photocatalytic degradation, and discloses a g-C3N4 heterojunction-BiOBr loaded activated carbon photocatalytic material and a preparation method thereof, and the g-C3N4 heterojunction-BiOBr loaded activated carbon photocatalytic material comprises the following formula raw materials: a g-C3N4 heterojunction composite material, bismuth nitrate pentahydrate, potassium bromide, hexadecyl trimethyl bromide and biological activated carbon. G-C3N4 and TiO2 have good photochemical activity. Under the action of illumination, the g-C3N4 and the TiO2 absorb photons to become excited states to generate photogenerated electrons e-and holes h+ which oxidize-OH and H2O molecules to strong oxidizing .OH. At the same time, BioBr combines with the photogenerated electrons e-under the action of illumination to form strong reducing excited states. Under the joint action of the g-C3N4 and the TiO2, a plurality of organic pollutants can be reduced and decomposed, and Fe-Ni alloy has good conductivity and electron mobility and promotes the transmission of photoelectron e-so as to reduce the recombination efficiency of the photogenerated electrons e-and theholes h+ generated by the catalyst.

Description

technical field [0001] The invention relates to the technical field of photocatalytic degradation, in particular to a g-C 3 N 4 Heterojunction-BiOBr-supported activated carbon photocatalytic material and preparation method thereof. Background technique [0002] In recent years, my country's water resources and water environment have continued to deteriorate, and the quality of water resources has continued to decline. Water shortages and accidents caused by pollution have caused adverse social impacts and serious economic losses, and have caused people's health and sustainable development of society. The water pollutants mainly include untreated industrial wastewater, untreated domestic sewage, farmland sewage containing a large amount of chemical fertilizers and pesticides, industrial wastes and domestic garbage piled up by the river, etc. According to the chemical type of pollutants, it can be divided into inorganic sewage and organic sewage. [0003] Organic sewage gener...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24C02F1/30C02F101/30
CPCB01J27/24C02F1/30C02F2101/38C02F2101/40C02F2305/10C02F2101/30B01J35/33B01J35/39
Inventor 周奇峰
Owner 周奇峰
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