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Nanoparticle-embedded nitrogen-doped carbon nanotube and method for degrading tetracycline by using nanoparticle-embedded nitrogen-doped carbon nanotube

A nanoparticle, nitrogen-doped carbon technology, applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problem of time-consuming and labor-intensive, increased operating costs , unable to operate continuously, etc., to achieve the effect of high recycling rate, low cost, and good microwave absorption performance

Active Publication Date: 2022-08-05
重庆优钛实业有限公司 +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Chinese patent CN105999609A discloses a method for mineral degradation of tetracycline. The catalyst used is manganese ore, which can effectively degrade tetracycline. However, the catalyst used in practical applications needs to be collected by sedimentation or filtration, which will take a lot of time. and labor, increased operating costs
[0005] Chinese patent CN109248655A discloses a preparation, use method and application of magnetic carbon nanotubes. The adsorbent described can effectively remove various pollutants in water, but the method is to transfer organic pollutants from one phase to another. It is easy to cause secondary pollution, and the processing time is long, so it cannot be operated continuously

Method used

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  • Nanoparticle-embedded nitrogen-doped carbon nanotube and method for degrading tetracycline by using nanoparticle-embedded nitrogen-doped carbon nanotube
  • Nanoparticle-embedded nitrogen-doped carbon nanotube and method for degrading tetracycline by using nanoparticle-embedded nitrogen-doped carbon nanotube
  • Nanoparticle-embedded nitrogen-doped carbon nanotube and method for degrading tetracycline by using nanoparticle-embedded nitrogen-doped carbon nanotube

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preparation example Construction

[0036] One aspect of the present invention provides a method for preparing a nanoparticle-embedded nitrogen-doped carbon nanotube. In an exemplary embodiment of the method for preparing the nanoparticle-embedded nitrogen-doped carbon nanotubes, the preparation method may include the following steps:

[0037] S101, dissolving a metal salt and melamine in a solvent, mixing uniformly and drying to obtain a precursor, wherein the metal salt is one or more of Fe-containing metal salts, Co-containing metal salts and Ni-containing metal salts;

[0038] S102 , in an inert atmosphere, the precursor is pyrolyzed at 700° C.˜1200° C. to the end of the reaction to obtain a nitrogen-doped carbon nanotube embedded with nanoparticles.

[0039] Above, in the preparation process of nanoparticle embedded nitrogen-doped carbon nanotubes, Fe-containing metal salts, Co-containing metal salts and / or Ni-containing metal salts are used as Fe, Co and / or Ni sources, and melamine (C 3 H 6 N 6 ) are ca...

example 1

[0057] Step 1, ferric nitrate and melamine (C 3 H 6 N 6 ) was dissolved in ethanol solution in a molar ratio of 1:5, stirred and mixed evenly, and dried to obtain the precursor. After cooling, Fe@NCNTs were obtained.

[0058] In step 2, 150 mg of Fe@NCNT catalyst was added to 100 mL of an aqueous solution of tetracycline with a pH of 7 and a concentration of 20 mg / L, and irradiated for 1 min, 2 min, 3 min, 4 min, 5 min, and 6 min under the action of a microwave power of 520 W, respectively.

[0059] Step 3, use an ultraviolet spectrophotometer to measure the remaining concentration of tetracycline in the aqueous solution at different times, select a full-spectrum wavelength of 200 nm to 800 nm, and calculate the degradation rate of tetracycline by taking the absorbance at 357 nm.

example 2

[0061] Step 1, cobalt nitrate and melamine (C 3 H 6 N 6 ) was dissolved in ethanol solution in a molar ratio of 1:5, stirred and mixed evenly, and dried to obtain the precursor. After cooling, Co@NCNTs were obtained.

[0062] In step 2, 150 mg of Co@NCNT catalyst was added to 100 mL of an aqueous solution of tetracycline with a pH of 7 and a concentration of 20 mg / L, and irradiated for 1 min, 2 min, 3 min, 4 min, 5 min, and 6 min under the action of microwave power of 520 W, respectively.

[0063] Step 3, use an ultraviolet spectrophotometer to measure the remaining concentration of tetracycline in the aqueous solution at different times, select a full-spectrum wavelength of 200 nm to 800 nm, and calculate the degradation rate of tetracycline by taking the absorbance at 357 nm.

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Abstract

The invention provides a nanoparticle-embedded nitrogen-doped carbon nanotube and a method for degrading tetracycline by using the nanoparticle-embedded nitrogen-doped carbon nanotube. The preparation method of the nanoparticle-embedded nitrogen-doped carbon nanotube comprises the following steps: dissolving a metal salt and melamine in a solvent, uniformly mixing, and drying to obtain a precursor, the metal salt being one or more of a Fe-containing metal salt, a Co-containing metal salt and a Ni-containing metal salt; and in an inert atmosphere, pyrolyzing the precursor at 700-1200 DEG C until the reaction is finished, so as to obtain the nano particle embedded nitrogen-doped carbon nano tube. The method for degrading the tetracycline comprises the following steps: mixing the nano particle embedded nitrogen-doped carbon nano tube with a solution containing the tetracycline, and carrying out microwave irradiation to degrade the tetracycline. The Fe, Co and / or Ni nanoparticle embedded nitrogen-doped carbon nanotube catalyst prepared by the method has good microwave absorption performance, tetracycline can be rapidly and efficiently degraded under the action of microwaves, and the degradation rate can reach 99.5% or above.

Description

technical field [0001] The invention relates to the technical field of environmental protection, and more particularly, to a nitrogen-doped carbon nanotube embedded with nanoparticles and a method for degrading tetracycline. Background technique [0002] Tetracycline is one of the most commonly used antibiotics in humans and animals. Since it is difficult to be absorbed by humans and animals, a considerable part is released into the environment in the form of metabolites. Long-term exposure to antibiotic residues such as tetracycline may directly lead to the development of antibiotic resistance genes. In addition, antibiotics such as tetracyclines may also lead to the development of drug-resistant and multi-drug resistant bacteria, with direct harm to humans and animals as well as the environment. Therefore, in addition to the careful use of tetracycline in medicines, how to effectively dispose of tetracycline in water is an urgent problem to be solved. [0003] In recent ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/18B01J23/745B01J23/75B01J23/755B01J27/24B01J35/00C02F1/30C02F101/38
CPCB01J21/185B01J27/24B01J23/745B01J23/75B01J23/755C02F1/302C02F2101/38B01J35/393Y02W10/37
Inventor 庞建明张群李石稳刘珏曾敏张翊
Owner 重庆优钛实业有限公司
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