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Preparation method of Gd < 3 + > doped BiOBr photocatalytic material

A photocatalytic material, the technology of cetyl trimethyl ammonium bromide, is applied in the field of preparation of BiOBr photocatalytic materials, and achieves the effects of simple method, avoiding a large reduction in photocatalytic efficiency and improving efficiency

Inactive Publication Date: 2020-09-15
NANCHANG HANGKONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention provides a rare earth ion Gd 3+ Preparation method of doped BiOBr photocatalytic material to solve environmental and energy problems

Method used

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  • Preparation method of Gd &lt; 3 + &gt; doped BiOBr photocatalytic material
  • Preparation method of Gd &lt; 3 + &gt; doped BiOBr photocatalytic material
  • Preparation method of Gd &lt; 3 + &gt; doped BiOBr photocatalytic material

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] BiOBr / Gd composites were prepared according to the following steps:

[0028] (1) Weigh 1.45g cetyltrimethylammonium bromide and put it into boiled 18ml ethylene glycol as solution A, weigh 1.9414g bismuth nitrate pentahydrate and add it to 12ml glycerol, then add 0.036 g hydrated nitric acid solution, as solution B. Both solution A and solution B were stirred for 30 minutes, then solution B was slowly added dropwise to the beaker containing solution A, and the mixture of the two solutions was ultrasonically treated for 30 minutes to obtain a suspension;

[0029] (2) Transfer the suspension obtained in step (1) to a 50ml steel reaction kettle, put the reaction kettle in an oven, and heat the oven to 160 degrees Celsius for 12 hours;

[0030] (3) Transfer the reaction solution obtained in step (2) to a 50ml centrifuge tube, centrifuge to obtain the precipitate, and wash with deionized water and absolute ethanol three times respectively;

[0031] (4) Put the precipitate ...

Embodiment 2

[0033] Gd / BiOBr composites were prepared according to the following steps:

[0034] (1) Weigh 1.45g of cetyltrimethylammonium bromide and put it into boiled 18ml of ethylene glycol as solution A, weigh 1.9414g of bismuth nitrate pentahydrate and add it to 12ml of glycerol, then add 0.090 g of hydrated nitric acid was used as solution B. Both solution A and solution B were stirred for 30 minutes, then solution B was slowly added dropwise to the beaker containing solution A, and the mixture of the two solutions was ultrasonically treated for 30 minutes;

[0035] (2) Transfer the suspension obtained in step (1) to a 50ml steel reaction kettle, put the reaction kettle in an oven, and heat the oven to 160 degrees Celsius for 12 hours;

[0036] (3) Transfer the reaction solution obtained in step (2) to a 50ml centrifuge tube, centrifuge to obtain the precipitate, and wash with deionized water and absolute ethanol three times respectively;

[0037] (4) Put the precipitate obtained ...

Embodiment 3

[0039] Gd / BiOBr composites were prepared according to the following steps:

[0040] (1) Weigh 1.45g of cetyltrimethylammonium bromide and put it into boiled 18ml of ethylene glycol as solution A, weigh 1.9414g of bismuth nitrate pentahydrate and add it to 12ml of glycerol, then add 0.18 g of hydrated nitric acid was used as solution B. Both solution A and solution B were stirred for 30 minutes, then solution B was slowly added dropwise to the beaker containing solution A, and the mixture of the two solutions was ultrasonically treated for 30 minutes;

[0041] (2) Transfer the suspension obtained in step (1) to a 50ml steel reaction kettle, put the reaction kettle in an oven, and heat the oven to 160 degrees Celsius for 12 hours;

[0042] (3) Transfer the suspension obtained in step (2) to a 50ml centrifuge tube, centrifuge to obtain the precipitate, and wash with deionized water and absolute ethanol three times respectively;

[0043] (4) Put the precipitate obtained after wa...

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Abstract

The invention provides a preparation method of a Gd < 3 + > doped BiOBr photocatalytic material. According to the method, nitric acid rolling, bismuth nitrate pentahydrate and cetyltrimethylammonium bromide are used as raw materials, isopropanol and ethylene glycol are used as reaction solvents, and the Gd / BiOBr composite photocatalytic material (hereinafter referred to as a composite material) isprepared by adopting a hydrothermal synthesis method which is simple and easy to operate. A xenon lamp is used as a light source, low-wavelength light (lambda (420 nm) is filtered out through a filter, and the photocatalytic performance of the Gd / BiOBr photocatalytic material is tested. The photocatalytic performance of the composite material is characterized by reducing carbon dioxide to methanol and calculating its conversion rate. The material is a compound of a rare earth element and a bismuth oxyhalide semiconductor, a special electronic structure and good absorption performance on visible light are the basis of the photocatalyst, and the catalyst has the advantages of no toxicity, easiness in synthesis, good stability and the like so that the material has a wide application prospectin the aspects of water pollution treatment and removal of carbon dioxide in air.

Description

technical field [0001] The invention relates to a preparation method of BiOBr photocatalytic material doped with rare earth ions, and specifically belongs to the field of photocatalytic material preparation. Background technique [0002] In sewage treatment, photocatalysis is considered as a green and cheap method. With the continuous development of nanotechnology, many potential photosensitive nano-semiconductor metal oxides, sulfides and halides have been synthesized, such as Bi 2 o 3 , Fe 2 o 3 , ZnO, TiO 2 , CdS, BiOCl. [0003] In recent years, the development of Bi-based photocatalysts has attracted extensive attention. As an innovative photocatalyst for water purification, BiOBr is chemically inert, harmless and corrosion-resistant in water. Likewise, BiOBr exhibits good photocatalytic activity in pollutant removal, carbon dioxide reduction, nitrogen fixation, disinfection, and oxygen and hydrogen evolution. All of the above are based on its small forbidden ban...

Claims

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Application Information

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IPC IPC(8): B01J27/06C02F1/30B01D53/62B01D53/86C02F101/30
CPCB01J27/06C02F1/30B01D53/8671C02F2305/10C02F2101/30B01J35/39Y02C20/40
Inventor 张帆谢宇吴俊黄姝郭瑶张龙曾国强俞志飞凌云
Owner NANCHANG HANGKONG UNIVERSITY
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