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Preparation method and application of a carbon nanofiber-hydrotalcite composite adsorbent

A carbon nanofiber, composite material technology, applied in chemical instruments and methods, adsorbed water/sewage treatment, water pollutants, etc. and adsorption rate, etc., to achieve the effects of excellent physical and chemical properties, good environmental stability, and fast reaction kinetics

Active Publication Date: 2020-08-21
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, they have the following disadvantages: (1) the production cost is high; (2) the preparation process is complicated; (3) it is not easy for large-scale production and application
However, the large-scale application of hydrotalcite-like materials is limited due to their low removal capacity and adsorption rate.

Method used

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  • Preparation method and application of a carbon nanofiber-hydrotalcite composite adsorbent

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[0029] The present invention provides a kind of preparation method of carbon nanofiber-hydrotalcite composite adsorbent, described method comprises the following steps:

[0030] (1) Preparation of carbon nanofibers;

[0031] (2) Preparation of carbon nanofiber-hydrotalcite composites.

[0032] Wherein, the preparation of the carbon nanofibers described in step (1) comprises the following steps:

[0033] 1) Preparation of tellurium nanowires: Dissolve 1.0g polyvinylpyrrolidone in 35mL ultrapure water at room temperature, add 0.0922g sodium tellurite, stir for 15-30min, then add 1.7mL hydrazine hydrate and 3.4mL ammonia water, Stir for another 15-30 minutes; transfer the above solution to a 50mL reactor, heat at 180°C for 4-6 hours, then quickly cool the reactor to room temperature with water;

[0034] 2) Preparation of carbon nanofibers: Take 10 mL of the tellurium nanowire solution prepared in step 1), add 30 mL of acetone, and centrifuge at 8000 rpm for 30 to 60 min; wash t...

Embodiment 1

[0043] A preparation method of carbon nanofiber-hydrotalcite composite adsorbent, comprising the following steps:

[0044] (1) Preparation of carbon nanofibers, the steps are as follows:

[0045] 1) Preparation of tellurium nanowires: at room temperature, 1.0 g of polyvinylpyrrolidone was dissolved in 35 mL of ultrapure water, 0.0922 g of sodium tellurite was added, and stirred for 15 min. Then add 1.7mL hydrazine hydrate and 3.4mL ammonia water, and stir for 15min. Transfer the above solution to a 50mL reaction kettle, heat at 180°C for 4h, then take out the reaction kettle, and quickly cool it to room temperature with tap water;

[0046] 2) Preparation of carbon nanofibers: Take 10 mL of the prepared tellurium nanowire solution, add 30 mL of acetone, and centrifuge at 8000 rpm for 30 min. The resulting precipitate was washed with a small amount of water to remove residual polyvinylpyrrolidone, and redispersed into 60 mL of ultrapure water. Add 1.0g of glucose and stir to ...

Embodiment 2

[0051] A preparation method of carbon nanofiber-hydrotalcite composite adsorbent, comprising the following steps:

[0052] (1) Preparation of carbon nanofibers, the steps are as follows:

[0053] 1) Preparation of tellurium nanowires: at room temperature, 1.0 g of polyvinylpyrrolidone was dissolved in 35 mL of ultrapure water, 0.0922 g of sodium tellurite was added, and stirred for 20 min. Then add 1.7mL hydrazine hydrate and 3.4mL ammonia water, and stir for another 20min. Transfer the above solution to a 50mL reaction kettle, heat at 180°C for 5h, then take out the reaction kettle, and quickly cool it to room temperature with tap water;

[0054] 2) Preparation of carbon nanofibers: Take 10 mL of the prepared tellurium nanowire solution, add 30 mL of acetone, and centrifuge at 8000 rpm for 45 min. The resulting precipitate was washed with a small amount of water to remove residual polyvinylpyrrolidone, and redispersed into 60 mL of ultrapure water. Add 3.0g of glucose and ...

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Abstract

The invention discloses a method for preparing a carbon nanofiber-hydrotalcite composite material adsorbent. The method adopts tellurium nanowire as a template and glucose as a carbon source to prepare carbon nanofibers by a 'one-step method', hydrotalcite further grows outside the carbon nanofibers by a hydro-thermal method, and the carbon nanofiber-hydrotalcite composite material is obtained. The carbon nanofibers well carry on the one-dimensional appearance and three-dimensional reticular structure of the template, a great number of oxygen-containing functional groups are on the surface, and the stability of the carbon nanofibers in an aqueous solution can be reinforced by adding the hydrotalcite material. The preparation method is simple, convenient and feasible; and the adsorbent hashigh adsorption capacity for radionuclide, has relatively rapid reaction kinetics, does not have second pollution in the adsorbing process, and has an excellent effect for removing radionuclide in waste water.

Description

technical field [0001] The invention belongs to the technical field of preparation of nano functional materials and environmental materials, and in particular relates to a preparation method and application of a carbon nanofiber-hydrotalcite composite adsorbent. In particular, the preparation method of carbon nanofiber-hydrotalcite composite adsorbent and its application technology for the adsorption of radionuclides in water treatment. Background technique [0002] With the rapid development of natural nuclear science and nuclear energy, more and more nuclear power plants have been developed and operated, but a large amount of nuclear waste has also been produced. Some radioactive elements such as uranium (U), technetium (Tc), plutonium (Pu) and neptunium (Np) are highly toxic in their oxidized state. These radionuclides can cause neurological disorders, infertility, and congenital malformations in children, as well as various cancers in organs such as the lung, breast, co...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/20B01J20/30C02F1/28C02F101/20
CPCB01J20/0248B01J20/04B01J20/205C02F1/281C02F2101/20
Inventor 于淑君王祥学赵桂霞王祥科
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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