Bismuth oxybromide particles with three-dimensional flower-like microstructure and preparation method and use thereof

A microstructure, three-dimensional flower-like technology, applied in chemical instruments and methods, inorganic chemistry, bismuth compounds, etc., can solve problems such as low specific surface area, limited microstructure adjustability, and easy aggregation.

Inactive Publication Date: 2011-11-16
SHANGHAI NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the currently prepared bismuth oxybromide materials still have problems such as low specific su...

Method used

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  • Bismuth oxybromide particles with three-dimensional flower-like microstructure and preparation method and use thereof
  • Bismuth oxybromide particles with three-dimensional flower-like microstructure and preparation method and use thereof
  • Bismuth oxybromide particles with three-dimensional flower-like microstructure and preparation method and use thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0024] 0.12g bismuth nitrate pentahydrate (2.47×10 -4 mol) into a mixed solution of 5.0mL ethylene glycol and 35.0mL isopropanol, and stir to fully dissolve it. Then add 0.18g cetyltrimethylammonium bromide (4.94×10 -4 mol), and stirred until the solution was clear. The obtained transparent solution was put into a polytetrafluoroethylene-lined stainless steel reactor, keeping the volume of the solution at 80% of the total volume of the reactor, and placed in an oven at 160° C. for 12 hours. After the reaction is completed, let the reactor cool down to 25°C naturally, and a yellow powder can be obtained. The powder was centrifuged, rinsed three times with deionized water, and then oven dried at 80°C. Then put the sample into a crucible, and bake it in a muffle furnace at 400° C. for 4 hours under air, and then obtain bismuth oxybromide particles with a three-dimensional flower-like microstructure.

[0025] figure 1 The X-ray diffraction spectrum of the product of this embo...

Embodiment 2

[0027]Add 0.12 g of bismuth nitrate pentahydrate into a mixed solution of 2.0 mL of ethylene glycol and 38.0 mL of isopropanol, and stir to fully dissolve it. Then 0.18 g of cetyltrimethylammonium bromide was added. The obtained transparent solution was put into a polytetrafluoroethylene-lined stainless steel reactor, keeping the volume of the solution at 80% of the total volume of the reactor, and placed in an oven at 160° C. for 12 hours. After the reaction is completed, let the reactor cool down to 25°C naturally, and a yellow powder can be obtained. The powder was centrifuged, rinsed three times with deionized water, and then oven dried at 80°C. Then put the sample into a crucible, and bake it in a muffle furnace at 400° C. for 4 hours under air, and then obtain bismuth oxybromide particles with a three-dimensional flower-like microstructure.

[0028] figure 1 The X-ray diffraction spectrum of the product of this embodiment is consistent with JCPDS#93-0393, proving that...

Embodiment 3

[0030] Add 0.12 g of bismuth nitrate pentahydrate into a mixed solution of 10.0 mL of ethylene glycol and 30.0 mL of isopropanol, and stir to fully dissolve it. Then 0.18 g of cetyltrimethylammonium bromide was added. The obtained transparent solution was put into a polytetrafluoroethylene-lined stainless steel reactor, keeping the volume of the solution at 80% of the total volume of the reactor, and placed in an oven at 160° C. for 12 hours. After the reaction is completed, let the reactor cool down to 25°C naturally, and a yellow powder can be obtained. The powder was centrifuged, rinsed three times with deionized water, and then oven dried at 80°C. Then put the sample into a crucible, and bake it in a muffle furnace at 400° C. for 4 hours under air, and then obtain bismuth oxybromide particles with a three-dimensional flower-like microstructure.

[0031] figure 1 The X-ray diffraction spectrum of the product of this embodiment is consistent with JCPDS#93-0393, proving th...

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Abstract

The invention discloses bismuth oxybromide particles with a three-dimensional flower-like microstructure and a preparation method and use thereof, which belong to the technical field of visible-light catalyst. The bismuth oxybromide powder has a three-dimensional flower-like microstructure of which the diameter is 1 to 5 micrometers, and the specific surface area of the bismuth oxybromide powder is 11.2 to 27.9m<2>/g. In the preparation method, mixed solution of glycol and isopropanol is used as a solvent, a bismuth salt and hexadecyl trimethyl ammonium bromide are used as a bismuth source and a bromide source respectively, the bismuth salt and hexadecyl trimethyl ammonium bromide are dissolved in the mixed solution of the glycol and isopropanol according to a Bi to Br ratio ranging from 1:1 to 1:4, the mixed solution is filled in a closed reaction kettle, the reaction kettle is placed in an oven at 120 to 160 DEG C for reaction for 6 to 24 hours, the obtained product is washed, centrifuged, dried and roasted in a muffle furnace at 250 to 450 DEG C for 4 to 6 hours, and finally the bismuth oxybromide is obtained. The obtained product has high photocatalyzing performance. The method is simple and convenient, the period is short, the raw materials are readily available, and the method meets the requirements for batch production.

Description

technical field [0001] The invention belongs to the technical field of visible light catalysts, and specifically relates to a bismuth oxybromide particle with a three-dimensional flower-like microstructure and a preparation method thereof. The obtained product can be used to degrade organic pollutants under visible light. Background technique [0002] Titanium dioxide (TiO 2 ) has become the most important photocatalyst in the past few decades due to its excellent chemical and photocorrosion resistance, low price, and no environmental pollution. However, due to titanium dioxide (TiO 2 ) with a large band gap (3.2eV) can only absorb ultraviolet light, and the utilization rate of sunlight is very low, so it has great limitations in practical applications. At present, researchers generally believe that the development of non-titanium dioxide (TiO 2 )'s new visible light catalyst is an important way to solve this problem, and its controllable band structure makes its photores...

Claims

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Application Information

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IPC IPC(8): C01G29/00B01J27/06B01J35/10A62D3/10
Inventor 霍宇凝苗苗张佳金轶李和兴
Owner SHANGHAI NORMAL UNIVERSITY
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