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Method for preparing BiOCl with adjustable thickness at room temperature

Inactive Publication Date: 2020-01-10
HOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] However, the current high-temperature and high-pressure synthesis processes not only require high energy consumption, tedious processes, and long time-consuming, but also require long-term high-speed centrifugation after the synthesis reaction to obtain ultra-thin BiOCl nanosheet powders with small volume and light weight.
This severely restricts the large-scale production and application of ultrathin BiOCl nanosheets.

Method used

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  • Method for preparing BiOCl with adjustable thickness at room temperature
  • Method for preparing BiOCl with adjustable thickness at room temperature
  • Method for preparing BiOCl with adjustable thickness at room temperature

Examples

Experimental program
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Effect test

Embodiment 1

[0030] 1) Preparation of BiOCl monomer

[0031] First, 0.97 g of Bi(NO 3 ) 3 ·5H 2 O was added to 60 mL of aqueous solution and stirred for another 20 minutes. Then 10 mL of 1 mol / L hydrochloric acid solution was added. After stirring for 30 minutes, the precipitate was collected, washed repeatedly with ultrapure water and ethanol, and dried at 60°C to obtain BiOCl nanosheets, which were used for subsequent blank experiments.

[0032] 2) Preparation of BiCOl photocatalyst with adjustable thickness

[0033] Disperse 0.5, 1, 1.5, 2g (molar ratio 1:50-300) of mannitol respectively in 60mL of ultrapure water, stir well to dissolve, then add 0.97g of Bi(NO 3 ) 3 ·5H 2 O was added therein respectively, and after stirring for 20 minutes, 10 mL of 1 mol / L hydrochloric acid solution was added respectively. After stirring for 30 minutes, the obtained precipitate was centrifuged, washed repeatedly with ultrapure water and ethanol, and dried at 80°C to obtain BiOCl- 0.5, BiOCl-1, ...

Embodiment 2

[0038] 1) Preparation of BiOCl monomer

[0039] First, 0.97 g of Bi(NO 3 ) 3 ·5H 2 O was added to 60 mL of aqueous solution and stirred for another 20 minutes. Then 10 mL of 1 mol / L sodium chloride solution will be added. After stirring for 30 minutes, the precipitate was collected, washed repeatedly with ultrapure water and ethanol, and dried at 60°C to obtain BiOCl nanosheets, which were used for subsequent blank experiments.

[0040] 2) Preparation of BiCOl photocatalyst with adjustable thickness

[0041] Disperse 0.5, 1, 1.5, and 2 g of mannitol in 60 mL of ultrapure water, and stir to dissolve them, then add 0.97 g of Bi(NO 3 ) 3 ·5H 2 O was added therein respectively, after stirring for 20 minutes, 10 mL of 1 mol / L sodium chloride solution was added respectively, after stirring for 30 minutes, the precipitate obtained was centrifuged, washed repeatedly with ultrapure water and ethanol, and dried at 80°C to obtain BiOCl-0.5, BiOCl-1, BiOCl-1.5, BiOCl-2 nanosheets....

Embodiment 3

[0043] 1) Preparation of BiOCl monomer

[0044] First, 0.97 g of Bi(NO 3 ) 3 ·5H 2 O was added to 60 mL of aqueous solution and stirred for another 20 minutes. Then 10 mL of 1 mol / L potassium chloride solution will be added. After stirring for 30 minutes, the precipitate was collected, washed repeatedly with ultrapure water and ethanol, and dried at 60°C to obtain BiOCl nanosheets, which were used for subsequent blank experiments.

[0045] 2) Preparation of BiCOl photocatalyst with adjustable thickness

[0046] Disperse 0.5, 1, 1.5, and 2 g of mannitol in 60 mL of ultrapure water, and stir to dissolve them, then add 0.97 g of Bi(NO 3 ) 3 ·5H 2 O was added therein respectively, after stirring for 20 minutes, 10 mL of 1 mol / L potassium chloride solution was added respectively, after stirring for 30 minutes, the obtained precipitate was centrifuged, washed repeatedly with ultrapure water and ethanol, and dried at 80°C to obtain BiOCl-0.5, BiOCl-1, BiOCl-1.5, BiOCl-2 nanos...

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Abstract

The invention discloses a method for preparing thickness-adjustable BiOCl at room temperature,and belongs to the technical field of photocatalytic semiconductor material preparation. The method comprises the following steps: dispersing Bi(NO<3>)<3>*5H<2>O and mannitol in ultrapure water, and stirring until Bi(NO<3>)<3>*5H<2>O and mannitol are completely dissolved to obtain a clear water solution;and adding a chloride solution, stirring, centrifuging an obtained precipitate, repeatedly washing with ultrapure water and ethanol, and drying to obtain the BiOCl photocatalytic material, namely theBiOCl with adjustable thickness. According to the method for preparing the BiOCl with adjustable thickness at the room temperature, the BOCl nanosheets with adjustable thickness prepared through a simple and rapid method shows excellent photocatalytic activity in degradation of tetracycline under visible light. The method has the advantages of very simple process, low price, easy availability, lowcost and short reaction time, thereby reducing the energy consumption and reaction cost, being convenient for batch production, being non-toxic and harmless, and meeting the environment-friendly requirements; the thickness-adjustable BiOCl prepared at room temperature can degrade tetracycline pollution under the condition of visible light.

Description

technical field [0001] The invention belongs to the technical field of photocatalytic semiconductor material preparation, and in particular relates to a method for preparing BiOCl with adjustable thickness at room temperature. Background technique [0002] The increase in microbial resistance and antibiotic resistance due to the presence of antibiotics in natural waters is of great concern. Many antibiotics detected in aquatic environments, even at varying concentrations, can cause antibiotic resistance and have adverse effects on aquatic wildlife, ecosystems, and human health. Tetracycline belongs to tetracyclic antibiotics. This kind of antibiotic drug is named after the common hydrogenated tetraphenyl ring in its molecular structure. It belongs to broad-spectrum antibiotics. Chlamydia, mycoplasma and protozoa all have inhibitory effect. Tetracycline is the antibiotic with the largest production and clinical use in the livestock and poultry industry. It is continuously d...

Claims

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Application Information

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IPC IPC(8): B01J27/06C01G29/00C02F1/30C02F1/32C02F101/38
CPCB01J27/06C02F1/30C02F1/32C01G29/00C01P2004/03C02F2101/38C02F2305/10B01J35/39
Inventor 江润仁陆光华杨浩涵章夏冬
Owner HOHAI UNIV
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