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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  • Claims
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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

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[0028] Example 1

[0029] Steps for preparing photocatalyst BiOBr ultra-thin nanosheets with 1-butyl-3-methylimidazole bromide as bromine source:

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

Example Embodiment

[0031] Example 2

[0032] Using bismuth nitrate as the raw material, a solution A was prepared in a mixed solvent of 10 mL water and acetic acid (volume ratio 9:1), where the content of bismuth was 0.01 mol / L, and in another container, brominated ionic liquid was used as The raw materials are prepared into solution B in 10 mL of ethanol solvent, in which the content of bromine is 0.05 mol / L. Under the condition of stirring, solution B is added dropwise to solution A, and the resulting mixed solution is stirred at room temperature The product was centrifuged for 5 minutes, washed several times with deionized water and absolute ethanol, and dried at 50°C for 5 hours to obtain a solid powder.

Example Embodiment

[0033] Example 3

[0034] Using bismuth nitrate as the raw material, a solution A is prepared in a mixed solvent of 10 mL water and acetic acid (volume ratio 9:1), where the content of bismuth is 0.1 mol / L, and in another container, bromide ionic liquid is used as The raw materials are prepared into B solution in 10 mL of ethanol solvent, in which the content of bromine is 0.3 mol / L. While the A solution is under stirring, the B solution is added dropwise to the A solution, and the resulting mixed solution is continuously stirred 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...

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Application Information

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IPC IPC(8): B01J27/06C01G29/00C02F1/30C02F101/30C02F101/34C02F101/36C02F101/38
CPCB01J27/06B01J35/004B01J35/02C01G29/00C02F1/30C02F2101/308C02F2101/345C02F2101/36C02F2101/38C02F2305/10
Inventor 狄俊夏杰祥熊君季梦夏尹盛李华明
Owner JIANGSU UNIV
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