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Method of synthesizing bismuth oxybromide ultrathin nanosheet photocatalyst at room temperature

A technology of bismuth oxybromide and photocatalyst, applied in physical/chemical process catalysts, chemical instruments and methods, inorganic chemistry, etc., to achieve the effect of short synthesis time, thin thickness and efficient degradation

Inactive Publication Date: 2017-11-10
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are no literature reports or patent reports on the synthesis of BiOX ultrathin nanosheets at room temperature.

Method used

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  • Method of synthesizing bismuth oxybromide ultrathin nanosheet photocatalyst at room temperature
  • Method of synthesizing bismuth oxybromide ultrathin nanosheet photocatalyst at room temperature
  • Method of synthesizing bismuth oxybromide ultrathin nanosheet photocatalyst at room temperature

Examples

Experimental program
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Embodiment 1

[0029] Taking 1-butyl-3-methylimidazole bromide as the step of bromine source to prepare photocatalyst BiOBr ultra-thin nanosheets:

[0030] Using bismuth nitrate as raw material, A solution was formulated in a mixed solvent of 10mL water and acetic acid (volume ratio: 9:1), wherein the content of bismuth was 0.01-0.2mol / L, and in another container, bromide ions were used The liquid is the raw material, and it is prepared in 10mL of ethanol solvent to prepare solution B, in which the content of bromine is 0.01-0.6mol / L. Under the condition that solution A is stirred, add solution B dropwise to solution A, and mix the obtained solution The solution was stirred at room temperature for 5-120 minutes, the product was centrifuged, washed several times with deionized water and absolute ethanol, and dried at 50° C. for 5-24 hours to obtain a solid powder.

Embodiment 2

[0032] Adopt bismuth nitrate as raw material, be made into A solution in the mixed solvent of 10mL water and acetic acid (volume ratio is 9:1), wherein the content of bismuth is 0.01mol / L, in another container, adopt bromide ionic liquid as The raw material is formulated into solution B in 10mL of ethanol solvent, wherein the content of bromine is 0.05mol / L. Under the condition of stirring solution A, add solution B dropwise to solution A, and continue to stir the resulting mixed solution at room temperature After 5 minutes, the product was centrifuged, washed several times with deionized water and absolute ethanol, and dried at 50° C. for 5 hours to obtain a solid powder.

Embodiment 3

[0034] Adopt bismuth nitrate as raw material, be made into A solution in the mixed solvent of 10mL water and acetic acid (volume ratio is 9:1), wherein the content of bismuth is 0.1mol / L, in another container, adopt bromide ionic liquid as The raw material is formulated into solution B in 10mL ethanol solvent, wherein the content of bromine is 0.3mol / L. Under the condition of stirring solution A, add solution B dropwise to solution A, and continue to stir the resulting mixed solution at room temperature After 60 minutes, the product was centrifuged, washed several times with deionized water and absolute ethanol, and dried at 50°C for 10 hours to obtain a solid powder.

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Abstract

The invention belongs to the technical field of preparing nano-metallic materials with wet chemistry, and relates to a visible light responsive bismuth oxybromide ultrathin nanosheet material and a preparing method. A reaction type bromine ionic liquid and bismuth nitrate are adopted to serve as raw materials, and react in a mixed solution of water, ethyl alcohol and acetic acid to obtain a product. The product is filtered and washed, and dried in the air to obtain the bismuth oxybromide ultrathin nanosheet material. The method is conducted at room temperature, no extra energy supply is needed, and reaction in the whole synthesis process needs one hour. Ionic liquid type selection and dosage play a key role in forming the oxybromide ultrathin nanosheet. According to the synthesizing method, the thickness of the oxybromide ultrathin nanosheet material is 0.7-2 nm. A designed and synthesized oxybromide ultrathin nanosheet photocatalyst has an excellent photocatalysis characteristic, and can efficiently degrade organic pollutants when radiated by visible light of which the wave length is bigger than 400 nm. The method is simple in synthesizing route, and the whole technology process is easy to control.

Description

technical field [0001] The invention belongs to the field of wet chemical preparation of nanometer materials, and relates to ionic liquid-assisted preparation at room temperature of bismuth oxybromide ultrathin nanosheet photocatalyst. Background technique [0002] Since its discovery in 2004, graphene has attracted great attention due to its unique and attractive physicochemical properties. In addition to graphene, graphene-like ultrathin two-dimensional (2D) nanostructures have attracted extensive attention due to their high proportion of surface atoms, which exhibit novel optical, electrical, mechanical, and biocompatible properties. . [4-8] [0003] Considering the special structure and fascinating properties of two-dimensional ultrathin nanomaterials, if a similar ultrathin structure with visible light response bandwidth is constructed and used for photocatalysis, its effect is worth looking forward to. Compared with the photo-generated carriers generated at the edge...

Claims

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Application Information

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IPC IPC(8): B01J27/06C01G29/00C02F1/30C02F101/30C02F101/34C02F101/36C02F101/38
CPCC01G29/00C02F1/30B01J27/06C02F2305/10C02F2101/308C02F2101/345C02F2101/36C02F2101/38B01J35/00B01J35/30B01J35/39
Inventor 狄俊夏杰祥熊君季梦夏尹盛李华明
Owner JIANGSU UNIV
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