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Visible light photocatalyst of BiOBr micro sphere and preparation method thereof

A technology of photocatalysts and microspheres, which is applied in the field of photocatalysis and material chemistry, and can solve problems such as limiting the application of photocatalysis

Inactive Publication Date: 2011-03-30
徐建 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Current research mainly focuses on photocatalysts that respond to ultraviolet light. These materials can only react under the excitation of ultraviolet light, which accounts for about 4% of solar energy, which greatly limits the practical application of photocatalysis.

Method used

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  • Visible light photocatalyst of BiOBr micro sphere and preparation method thereof
  • Visible light photocatalyst of BiOBr micro sphere and preparation method thereof
  • Visible light photocatalyst of BiOBr micro sphere and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Dissolve 0.5485g CTAB in 40mL of ethylene glycol solution, stir evenly to obtain cloudy liquid A; weigh 0.7300gBi(NO 3 ) 3 ·5H 2 O, add it to the above solution A, and stir evenly, then magnetically stir this solution for 30min; transfer the stirred solution into a 50mL polytetrafluoro reactor, and react at 180°C for 12h; Centrifuge again, wash with water, and finally dry at 60°C to obtain BiOBr microspheres.

Embodiment 2

[0021] The mass of CTAB added in Example 1 can be adjusted to 1.0970g and 1.6455g, and the volume of ethylene glycol added can be changed to 30 or 40mL, thereby changing the conditions to obtain BiOBr with the following different conditions.

[0022] Catalyst name

Embodiment 3

[0024] Get sample 0.1g among the embodiment two as catalyst (with P25 as contrast), join in the Rhodamine B solution of 200mL 0.1mol / L, use 800W xenon lamp as light source, test its photocatalytic degradation to organic dye Rhodamine B Effect. Figure 4 It shows that the photocatalytic effect of BiOBr-4 is the best, that is, when Bi(NO 3 ) 3 ·5H 2 The photocatalytic degradation effect of the synthesized BiOBr microspheres is the best when the ratio of the amount of O and CTAB is 1:1, and the volume of ethylene glycol is 40mL.

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Abstract

The invention relates to a novel visible light responding photocatalysis material and a preparation method thereof. The effect of the visible light responding photocatalysis material of the BiOBr micro sphere is obviously superior to that of TiO2 (P25, Degussa), wherein BiOBr is square crystalloid; and the diameter of the sphere is about 5mu m. The invention discusses the effects of the additive amounts of glycol and hexadecyl trimethyl ammonium bromide on the physical, chemical and photocatalytic performances of the synthesized catalyst. The preparation process is simple and environment-friendly. The catalyst can almost completely remove the organic dye rhodamine B under visible light.

Description

technical field [0001] The invention relates to a photocatalyst responsive to visible light and a preparation method thereof, belonging to the fields of photocatalysis and material chemistry. Background technique [0002] In recent years, photocatalytic oxidation technology has attracted extensive attention due to its many incomparable advantages. Studies have shown that photocatalytic oxidation can degrade many substances in water and the atmosphere, and the photocatalytic oxidation effect is directly related to the physical and chemical characteristics of the photocatalyst used. Current research mainly focuses on photocatalysts that respond to ultraviolet light. These materials can only react under the excitation of ultraviolet light, which accounts for about 4% of solar light energy, which greatly limits the practical application of photocatalysis. In order to use sunlight more efficiently, improve the utilization rate of light energy, and expand the application of photo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B11/06B01J27/06
Inventor 徐建张远李蕾郭昌胜
Owner 徐建
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