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Modified oxidized single-walled carbon nanohorn, its preparation method and application, and method for adsorbing antibiotics

A single-walled carbon nanohorn and carbon nanohorn technology, which is applied in chemical instruments and methods, adsorption of water/sewage treatment, alkali metal oxides/hydroxides, etc., can solve the problems of poor dispersion, limited application of adsorbents, Prone to aggregation and other problems

Active Publication Date: 2020-07-17
WUHU INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the oxidized single-walled carbon nanohorn itself is a hydrophobic material, which is not well dispersed in water and is prone to aggregation, which limits its application as an adsorbent in aqueous solution.

Method used

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  • Modified oxidized single-walled carbon nanohorn, its preparation method and application, and method for adsorbing antibiotics
  • Modified oxidized single-walled carbon nanohorn, its preparation method and application, and method for adsorbing antibiotics
  • Modified oxidized single-walled carbon nanohorn, its preparation method and application, and method for adsorbing antibiotics

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] Preparation of modified oxidized single-walled carbon nanohorns:

[0056] (1) 0.531g of stearic acid was ultrasonically dissolved in 13.27g of ethanol, and then 1.061g of 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide, 0.531g of N-hydroxysuccinyl imine, avoid light and stir, and carry out activation reaction for 1.0h to obtain activated stearic acid;

[0057] (2) Dissolve 0.664g of chitosan oligosaccharide in 1.062g of water, add activated stearic acid, react in a reflux reaction at 80°C for 5h, add ethanol after the reaction, and centrifuge to remove impurities to obtain a modifier;

[0058] (3) Ultrasonic mixing of oxidized single-walled carbon nanohorns and water, the ultrasonic frequency is 50kHZ, the temperature is 32°C, mixed for 1 hour, and then the modifier is added, wherein the mass ratio of oxidized single-walled carbon nanohorns, modifiers and water The ratio is 1:18:4000, then ultrasonic at 32°C, 50kHZ for 1.0h, and then centrifuged at 11000rpm / min for 15min...

Embodiment 2

[0060] Preparation of modified oxidized single-walled carbon nanohorns:

[0061] (1) 0.664g stearic acid is ultrasonically dissolved in 13.27g ethanol, then add 1.327g 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide, 0.664g N-hydroxysuccinyl imine, avoid light and stir, and carry out activation reaction for 1.2h to obtain activated stearic acid;

[0062] (2) Dissolve 0.796g of chitosan oligosaccharide in 1.194g of water, add activated stearic acid, react in a reflux reaction at 78°C for 6h, add ethanol after the reaction, and centrifuge to remove impurities to obtain a modifier;

[0063] (3) Ultrasonic mixing of oxidized single-walled carbon nanohorns and water, the ultrasonic frequency is 60kHZ, the temperature is 40°C, mixed for 1.5h, and then the modifier is added, wherein the mass of oxidized single-walled carbon nanohorns, modifiers and water The ratio is 1:22:4200, then ultrasonic at 40°C, 60kHZ for 1.5h, and then centrifuged at 15000rpm / min for 20min to remove the supern...

Embodiment 3

[0065] Preparation of modified oxidized single-walled carbon nanohorns:

[0066] (1) 0.398g of stearic acid was ultrasonically dissolved in 13.27g of ethanol, and then 0.796g of 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide, 0.398g of N-hydroxysuccinyl imine, avoid light and stir, and carry out activation reaction for 0.8h to obtain activated stearic acid;

[0067] (2) Dissolve 0.531g of chitosan oligosaccharide in 0.929g of water, add activated stearic acid, react in a reflux reaction at 82°C for 4 hours, add ethanol after the reaction, and centrifuge to remove impurities to obtain a modifier;

[0068] (3) Ultrasonic mixing of oxidized single-walled carbon nanohorns and water, the ultrasonic frequency is 40kHZ, the temperature is 25°C, mixed for 0.5h, and then the modifier is added, wherein the mass of oxidized single-walled carbon nanohorns, modifiers and water The ratio is 1:1:3800, then ultrasonic at 25°C, 40kHZ for 0.5h, and then centrifuged at 8000rpm / min for 10min to r...

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Abstract

The invention discloses a modified oxidized single-walled carbon nanohorn, its preparation method and application, and a method for adsorbing antibiotics. The modified oxidized single-walled carbon nanohorn contains a modifier and oxidized units modified by the modifier. Wall carbon nanohorn; wherein, the modifier is prepared by amidation reaction, wherein the amine source is chitosan oligosaccharide, and the acyl source is one of stearic acid, deoxycholic acid, linolenic acid, oleic acid and palmitic acid or more. The acyl source in the modifier has the characteristics of hydrophobicity and strong affinity for oxidized single-walled carbon nanohorns. It accumulates and winds on the oxidized single-walled carbon nanohorns, and the end of the chitosan oligosaccharide in the modifier plays a hydrophilic role. , improving the hydrophilic degree of the modified oxidized single-walled carbon nanohorn, inhibiting the agglomeration of the oxidized single-walled carbon nanohorn, and facilitating the dispersion of the modified oxidized single-walled carbon nanohorn in an aqueous solution.

Description

technical field [0001] The invention relates to a modified oxidized single-wall carbon nanohorn, in particular to a modified oxidized single-wall carbon nanohorn, a preparation method and application thereof, and a method for adsorbing antibiotics. Background technique [0002] Antibiotics are a new type of organic environmental pollutants, mainly from antibiotic production, medical and health industries, animal husbandry, aquaculture, etc. Antibiotics cannot be completely absorbed by humans and livestock, and most of them will be discharged into the environment in the form of drug prototypes or their metabolites, which will not only induce antibiotic-resistant strains, but also endanger the ecological environment and human health. Ciprofloxacin is a synthetic third-generation quinolone antibacterial drug with broad-spectrum antibacterial activity and good bactericidal effect. When this type of antibiotic is used, 50% of it is excreted into the environment in the form of pro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/24B01J20/28B01J20/30C02F1/28C02F101/34C02F101/36C02F101/38
CPCB01J20/205B01J20/22B01J20/24B01J20/28011C02F1/288C02F2101/34C02F2101/36C02F2101/38
Inventor 李囡囡黄越纪兴华
Owner WUHU INST OF TECH
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