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Growth catalyst for preparing carbon nanotube with high specific surface area

A technology of carbon nanotubes and catalysts, which is applied in the field of growing catalysts, can solve the problems of quality reduction of multi-walled carbon nanotubes, and achieve the effects of large-scale scale-up production and simple process

Pending Publication Date: 2022-04-12
诺瑞(深圳)新技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

During the synthesis of multi-walled CNTs, the current problem is that as the wall number of multi-walled carbon nanotubes increases, the proportion of disordered graphite also increases, resulting in a decrease in the quality of multi-walled carbon nanotubes

Method used

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  • Growth catalyst for preparing carbon nanotube with high specific surface area
  • Growth catalyst for preparing carbon nanotube with high specific surface area
  • Growth catalyst for preparing carbon nanotube with high specific surface area

Examples

Experimental program
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Effect test

Embodiment 1

[0041] This embodiment provides a Fe-Co-Mo-Al quaternary carbon nanotube growth catalyst, and its preparation method is as follows:

[0042] (1) Take Fe (NO 3 ) 3 ·9H 2 O, Co(NO 3 ) 2 ·6H 2 O and Al (NO 3 ) 3 ·9H 2 O was dissolved in deionized water, respectively, to prepare a 1 mol / Kg solution for later use. Take (NH 4 ) 6 Mo 7 O 24 ·4H 2 O was dissolved in deionized water to prepare a 0.1 mol / Kg solution for later use. Take (NH 4 ) 2 CO 3 Dissolved in deionized water to prepare a 2mol / Kg solution for later use.

[0043] (2) According to the element molar ratio of Fe:Co:Mo:Al=0.25:0.25:0.05:1, measure 20g, 20g, 40g and 80g of Fe, Co, Mo, and Al precursor solutions, respectively, and mix them. A metal precursor solution is obtained.

[0044] (3) Add 200 mL of deionized water and 150 g of prepared (NH) to a 2L three-necked flask 4 ) 2 CO 3 The solution was stirred, heated to 45°C, and the metal precursor solution was slowly added dropwise. After the dropw...

Embodiment 2

[0056] This embodiment provides a Fe-Co-Mo-Al quaternary carbon nanotube growth catalyst. The catalyst preparation method is the same as that of Embodiment 1, and the element molar ratio is Fe:Co:Mo:Al=0.125:0.25:0.0375:1.

[0057] The experimental results of the carbon nanotubes prepared by the above-mentioned carbon nanotube growth catalyst with the preparation method in Example 1 at different reaction temperatures and reaction times are shown in Table 2:

[0058] Table 2. Results of carbon nanotube production rate and specific surface area under different experimental conditions in Example 2

[0059] Experiment number Reaction temperature / ℃ Response time / min production rate Specific surface area / (m 2 / g)

1 620 10 8.5 368 2 630 10 11 368 3 640 10 12 374 4 650 10 13 374 5 660 10 17 369 6 700 10 23 347

[0060] refer to figure 2 and image 3 , are the SEM and TEM images of carbon nanotubes grown at a ...

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Abstract

The invention discloses a growth catalyst for preparing a carbon nanotube with a high specific surface area. In a first aspect of the present application, a carbon nanotube growth catalyst is provided, represented by FexCoyMozAl, 0.3 < = (x + y) < = 0.6, 5 < = (x + y) / z < = 20, and x < = y. The carbon nanotube growth catalyst provided by the embodiment of the invention at least has the following beneficial effects that the Fe-Co-Mo-Al quaternary carbon nanotube growth catalyst provided by the embodiment of the invention contains multiple components such as iron, cobalt, molybdenum and aluminum, and the catalyst can be directly used without high-temperature pretreatment; the catalyst can be used for producing the carbon nano tube with the specific surface area larger than 350 m < 2 > / g at a high rate, the catalytic growth effect is excellent, and the catalyst has a large application prospect in preparation of the carbon nano tube.

Description

technical field [0001] The present application relates to the technical field of carbon nanotubes, in particular to a growth catalyst for preparing high specific surface area carbon nanotubes. Background technique [0002] Carbon nanotube (CNT) is a one-dimensional carbon nanomaterial with hollow tubular structure, which is composed of carbon atoms arranged in a hexagonal lattice, with a diameter of about 1 to 100 nm and a high aspect ratio. In theory, carbon nanotubes have super tensile strength, excellent thermal conductivity, excellent electrical conductivity and chemical stability. Due to its excellent physical and chemical properties, CNTs have shown application potential in the fields of composite materials, new energy, aerospace, biotechnology, electronics and semiconductors, and have been extensively and deeply studied. After years of development, CNTs have achieved commercial applications in conductive plastics and battery conductive additives. [0003] The synthe...

Claims

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Application Information

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IPC IPC(8): B01J23/882C01B32/162
Inventor 张新杰李卫力
Owner 诺瑞(深圳)新技术有限公司
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