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Cobalt catalyst for preparation of single-walled carbon nanotubes and preparation method and application of cobalt catalyst

A technology of single-walled carbon nanotubes and cobalt catalysts, applied in the direction of single-walled carbon nanotubes, carbon nanotubes, chemical instruments and methods, etc., can solve the problem of single-walled carbon nanotubes with large diameter, complex chirality, and narrow chirality distribution etc. to achieve the effects of short reaction time, easy access to raw materials, and simple synthesis methods

Active Publication Date: 2019-03-08
青岛海力威纳米科技有限公司
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  • Claims
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Problems solved by technology

[0005] Aiming at the above-mentioned problems of large diameter and complex chirality of single-walled carbon nanotubes, the present invention prepares Co / MgO catalysts to grow single-walled carbon nanotubes by impregnation method, uses carbon monoxide as a carbon source, and uses Co and MgO as catalysts and supports respectively, Single-walled carbon nanotubes are prepared by atmospheric pressure CVD, which realizes the synthesis of small-diameter single-walled carbon nanotubes with consistent structure and narrow chirality distribution in a wide temperature range, so it has good industrial application prospects

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  • Cobalt catalyst for preparation of single-walled carbon nanotubes and preparation method and application of cobalt catalyst
  • Cobalt catalyst for preparation of single-walled carbon nanotubes and preparation method and application of cobalt catalyst
  • Cobalt catalyst for preparation of single-walled carbon nanotubes and preparation method and application of cobalt catalyst

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preparation example Construction

[0039] In a typical embodiment of the present invention, a kind of preparation method of cobalt catalyst is provided, and described method comprises:

[0040] S1. Magnesium oxide and cobalt nitrate are placed in water, stirred and dried, and then made into powder;

[0041] S2. Calcining the powder described in step S1 at a high temperature to obtain a cobalt catalyst.

[0042] In yet another specific embodiment of the present invention, in the step S1,

[0043] The mass ratio of magnesium oxide to cobalt nitrate is 1 to 3:4 (the preferred mass ratio is 1.4:4),

[0044] In yet another specific embodiment of the present invention, the preparation method of the magnesium oxide is: calcining basic magnesium carbonate to obtain MgO, the calcining conditions are: the calcining temperature is 350-450°C (preferably 400°C), and the calcining time is 0.5~1.5h (preferably 1h), the magnesium oxide that adopts above-mentioned method to prepare is high in purity, is convenient to use as t...

Embodiment 1

[0058] The preparation of embodiment 1 cobalt catalyst

[0059] (1) Calcining basic magnesium carbonate at 400° C. for one hour in a muffle furnace to obtain MgO.

[0060] (2) Take 1.4g of cobalt nitrate and 4g of magnesium oxide, dissolve in 15ml of distilled water and stir evenly, put the above solution in an oven, dry it at 100°C, and grind it into powder in a mortar.

[0061] (3) Put the above powder in a muffle furnace and calcinate at 450° C. for 9 hours.

Embodiment 2

[0062] The preparation of embodiment 2 cobalt catalysts

[0063] (1) Calcining basic magnesium carbonate at 400° C. for one hour in a muffle furnace to obtain MgO.

[0064] (2) Take 1.4g of cobalt nitrate and 4g of magnesium oxide, dissolve in 15ml of distilled water and stir evenly, put the above solution in an oven, dry it at 100°C, and grind it into powder in a mortar.

[0065] (3) Put the above powder in a muffle furnace and calcinate at 400° C. for 10 h.

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Abstract

The invention provides a cobalt catalyst for preparation of single-walled carbon nanotubes and a preparation method and application of the cobalt catalyst. According to an impregnation method, a Co / MgO catalyst is prepared for growing of the single-walled carbon nanotubes; by adoption of carbon monoxide as a carbon source, Co and MgO serve as the catalyst and a carrier respectively to prepare thesingle-walled carbon nanotubes according to a normal pressure CVD method. Therefore, synthesis of the small-diameter single-walled carbon nanotubes in structural uniformity and narrow chiral distribution in wide and low heating temperature ranges is realized, and a promising industrial application prospect is achieved.

Description

technical field [0001] The invention belongs to the technical field of carbon nanotube catalyst preparation, and in particular relates to a cobalt catalyst for preparing single-walled carbon nanotubes, a preparation method and application thereof. Background technique [0002] Single-walled carbon nanotubes (SWNTs) are very attractive one-dimensional materials with various potential applications, and have unique structural features, such as large aspect ratio, few structural defects, and small radius of curvature at the end, etc., which make SWNTs Exhibiting singular mechanical, electrical and magnetic properties, it is widely used in various fields, such as electron field emission, membranes and nanoelectronic devices for microfluidic devices, etc. At present, SWNTs prepared by different methods are usually a mixture of metallic and semiconducting carbon nanotubes, which largely hinders the wide application of SWNTs in the fields of nanoelectronic devices and optoelectronic...

Claims

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Application Information

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IPC IPC(8): B01J23/75B01J35/10C01B32/162
CPCC01B32/162B01J23/75C01B2202/02C01B2202/36B01J35/61
Inventor 何茂帅武倩汝薛晗辛本武王灏珉孙冠伟
Owner 青岛海力威纳米科技有限公司
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