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Few-layer boron nitride as well as preparation method and application thereof

A boron nitride and boron oxide technology, applied in the field of environmental water pollution treatment, to achieve the effects of small impact, no secondary pollution and fast adsorption

Inactive Publication Date: 2014-09-24
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a new type of adsorbent—less-layer boron nitride for the removal of antibiotic pollutants in water bodies

Method used

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  • Few-layer boron nitride as well as preparation method and application thereof
  • Few-layer boron nitride as well as preparation method and application thereof
  • Few-layer boron nitride as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Weigh and mix urea and boron oxide (molar ratio 1:1), dissolve in 60 mL of 10% ethanol aqueous solution by mass fraction, heat at 50° C., and evaporate to remove the solvent to obtain a white powder. Transfer the white powder mixture to a porcelain boat, use nitrogen as a protective gas in a tube furnace, program the temperature up to 900°C at 1°C / min, keep it for 0.5h for calcination, and obtain a white solid that is few-layer boron nitride.

Embodiment 2

[0032] Weigh and mix urea and boron oxide (molar ratio 1:80), dissolve in 60 mL of 50% ethanol aqueous solution, heat at 50°C, and evaporate to remove the solvent to obtain a white powder. The white powder mixture was transferred to a porcelain boat, and the temperature was programmed to rise to 1100°C at 5°C / min in a tube furnace with nitrogen as a protective gas, and kept for 5h for calcination. The obtained white solid was few-layer boron nitride.

Embodiment 3

[0034] Weigh and mix urea and boron oxide (molar ratio 1:40), dissolve in 60 mL of 30% ethanol aqueous solution, heat at 50°C, and evaporate the solvent to obtain a white powder. Transfer the white powder mixture to a porcelain boat, use nitrogen as a protective gas in a tube furnace, program the temperature up to 900°C at 5°C / min, and keep it for 1h for calcination. The white solid obtained is the few-layer boron nitride.

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Abstract

The invention discloses a few-layer boron nitride as well as a preparation method and application of the few-layer boron nitride. The preparation method of the few-layer boron nitride comprises the following steps: mixing carbamide with boric oxide, dissolving the carbamide and the boric oxide in an ethanol aqueous solution and removing the ethanol by heating and evaporating to obtain white powder; transferring the white powder into a porcelain boat, calcining in a tubular furnace by taking nitrogen as a protection gas, and thus obtaining a white solid which is the few-layer boron nitride. The invention also discloses an application of the few-layer boron nitride in absorption removal of antibiotics pollutants in water. The few-layer boron nitride shows high adsorption removal rate of antibiotics after adsorbing for 2-3 minutes at the temperature of 15-45 DEG C and the pH of 3-11, so that the adsorption property of the few-layer boron nitride is obviously better than that of commercial-grade boron nitride. In addition, the material is simple to prepare, low in cost and strong in operability. The application of the few-layer boron nitride in absorption removal of antibiotics pollutants in water has good economic and environmental effects.

Description

technical field [0001] The invention belongs to the field of environmental water pollution treatment, and in particular relates to a few-layer boron nitride, a preparation method thereof and an application in adsorption and removal of antibiotic pollutants in water bodies. Background technique [0002] In recent years, antibiotics have been widely used clinically and in livestock and aquaculture for the prevention and treatment of diseases and the growth promotion of organisms. However, antibiotics are poorly absorbed by the body and have strong water solubility. They often enter the environment in the active form (parent or metabolites) along with human and livestock excretion, aquaculture and pharmaceutical wastewater discharge, and eventually remain in soil and water. The residue and accumulation of antibiotics in the environment can lead to many ecotoxicities such as microbial resistance, seriously affecting human health and ecological balance. At present, antibiotic re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/02C01B21/064C02F1/28
Inventor 巢艳红朱文帅吉海燕吴沛文李华明吴向阳张少龙
Owner JIANGSU UNIV
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