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Preparation method and application of hollow magnetic Co/carbon nano tube

A carbon nanotube and magnetic technology, which is applied in the field of preparation of hollow magnetic Co/carbon nanotubes, can solve problems such as limiting the practical application of materials, and achieve the effects of avoiding loss and unsafe factors, complicated process, and novel magnetic properties

Active Publication Date: 2017-07-21
ANQING NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although these carbon materials have high efficiency for the adsorption of pollutants, it has been found in practice that when these materials are used as adsorbents to adsorb pollutants from sewage, additional separation steps are required to separate the adsorbent from the water body, which further limits the use of materials. further practical application

Method used

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  • Preparation method and application of hollow magnetic Co/carbon nano tube
  • Preparation method and application of hollow magnetic Co/carbon nano tube
  • Preparation method and application of hollow magnetic Co/carbon nano tube

Examples

Experimental program
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Effect test

Embodiment 1

[0035] A method for preparing hollow magnetic Co / carbon nanotubes of the present embodiment comprises the following steps:

[0036] (1) Weigh 3.3g of dicyandiamide and 0.8g of cobalt acetate, add to 45ml of absolute ethanol, and magnetically stir the solution at 58°C for 2.5 hours;

[0037] (2) The solution was stirred at 58°C for 22 hours;

[0038] (3) Put the solution in an oven at 43°C for drying, leaving a solid powder;

[0039] (4) The solid powder is placed in a high-temperature tube furnace, under N 2 Calcined at 850°C for 0.5 hours under atmosphere, with a heating rate of 9°C / min;

[0040] (5) After natural cooling to 18°C, a hollow magnetic Co / carbon nanotube with a uniform shape and a bamboo-shaped tubular shape was obtained. The hollow magnetic Co / carbon nanotube is a mesoporous material with a nanoparticle surface area of ​​131.6 m 2 / g, the pore volume is 0.296cm 3 / g, the average pore diameter of the particles is 13.47nm.

Embodiment 2

[0042] A method for preparing hollow magnetic Co / carbon nanotubes of the present embodiment comprises the following steps:

[0043] (1) Weigh 3.7g of dicyandiamide and 1.2g of cobalt acetate, add them to 55ml of absolute ethanol, and magnetically stir the solution at 62°C for 3.5 hours;

[0044] (2) The solution was stirred at 62°C for 26 hours;

[0045] (3) Put the solution in an oven at 47°C to dry, leaving a solid powder;

[0046] (4) The solid powder is placed in a high-temperature tube furnace, under N 2 Calcination at 950°C for 1.5 hours under atmosphere, with a heating rate of 11°C / min;

[0047] (5) After natural cooling to 25°C, a hollow magnetic Co / carbon nanotube with a uniform shape and a bamboo-shaped tubular shape was obtained. The hollow magnetic Co / carbon nanotube is a mesoporous material with a nanoparticle surface area of ​​131.6 m 2 / g, the pore volume is 0.296cm 3 / g, the average pore diameter of the particles is 13.47nm.

Embodiment 3

[0049] A method for preparing hollow magnetic Co / carbon nanotubes of the present embodiment comprises the following steps:

[0050] (1) Weigh 3.5g of dicyandiamide and 1.0g of cobalt acetate, add them to 50ml of absolute ethanol, and stir the solution magnetically at 60°C for 3 hours;

[0051] (2) The solution was stirred at 60°C for 24 hours;

[0052] (3) Put the solution in an oven at 45°C for drying, leaving a solid powder;

[0053] (4) The solid powder is placed in a high-temperature tube furnace, under N 2 Calcination at 900°C for 1 hour under atmosphere, with a heating rate of 10°C / min;

[0054] (5) After natural cooling to 24°C, hollow magnetic Co / carbon nanotubes are obtained; figure 1 is the X-ray diffraction of Co / CNTs picture, figure 2 is the scanning electron microscope SEM of Co / carbon nanotubes ( figure 2 a and figure 2 b) and transmission electron microscope TEM ( figure 2 c and figure 2 d) Figure, from figure 2 a and figure 2 In the SEM image...

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Abstract

The invention discloses a preparation method of a hollow magnetic Co / carbon nano tube. The preparation method comprises the following steps of (1) weighing cyanoguanidine and cobalt acetate, adding cyanoguanidine and cobalt acetate to anhydrous alcohol, and magnetically stirring a solution for 2.5-3.5h at 58-62 DEG C, (2) stirring the solution for 22-26h at 58-62 DEG C, (3) drying the solution in a drying device, (4) roasting the solution for 0.5-1.5h at 850-950 DEG C in an N2 atmosphere in a high-temperature furnace at a heating rate of 9-11 DEG C / min, and (5) performing natural cooling to a room temperature to obtain the hollow magnetic Co / carbon nano tube. The invention further discloses an application of the hollow magnetic Co / carbon nano tube. The preparation method and the application of the hollow magnetic Co / carbon nano tube have the advantages that a preparation technology is simple, operation is convenient, the pollutant adsorption capacity is high, and separation from a water body in a later stage is convenient.

Description

technical field [0001] The invention belongs to the technical field of nanomaterial preparation, and in particular relates to a preparation method and application of a hollow magnetic Co / carbon nanotube. Background technique [0002] In recent years, environmental pollution caused by inorganic and organic pollutants has been widely concerned. They are not only highly toxic and carcinogenic in water, but also cause great harm to the environment and water. Carbon-based nanostructured materials, due to their large specific surface area and strong adsorption capacity, one-dimensional carbon materials have gradually become an economical and high-efficiency adsorbent for the adsorption of pollutants in water bodies. For example, Yu et al. successfully synthesized cell membranes composed of carbon nanofibers. After being modified by β-cyclodextrin, CNF-β-CD can be applied to adsorb basic fuchsin from sewage (ACSNano, 2011, Vol. 5, p. 5928). Wang et al. used synthesized multi-wall...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/28B01J20/02C02F1/28C02F101/20C02F101/30
Inventor 张元广
Owner ANQING NORMAL UNIV
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