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A carbon nanotube and substrate technology, which is applied in the field of carbon nanotube preparation and achieves the effects of fast deposition rate, good deposition quality and large diameter
Inactive Publication Date: 2012-01-25
TIANJIN UNIVERSITY OF TECHNOLOGY
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[0025] Example 1
[0026] A method for preparing carbon nanotubes is prepared by a direct current plasma jet chemical vapor deposition system, and the steps are as follows:
[0027] 1) Dissolve 14.5g of nickel nitrate and 13g of magnesium nitrate crystals in 100mL of absolute ethanol to prepare a mixed solution as a catalyst precursor, and prepare Ni(NO 3 ) 2 And Mg(NO 3 ) 2 The concentration is 0.5mol / L, Ni(NO 3 ) 2 With Mg(NO 3 ) 2 A mixed solution with a molar ratio of 1:1;
[0028] 2) Drop the above-mentioned mixed solution evenly on the molybdenum platform and let it dry naturally;
[0029] 3) Wrap the tin wire in a ring shape eight times to pad under the molybdenum table, and place them on the deposition table in the chamber of the DC plasma jet chemical vapor deposition equipment;
[0030] 4) Close the vacuum chamber and turn on the vacuum pump and water pump to vacuum. When the pump pressure is less than 3kpa, turn on the Roots pump. When the pump pressure is less than 0.1pa, pa...
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[0034] Example 2
[0035] A method for preparing carbon nanotubes is prepared by a direct current plasma jet chemical vapor deposition system, and the steps are as follows:
[0036] 1) Dissolve 8.93g of nickel nitrate and 2.56g of magnesium nitrate crystals in 100mL of absolute ethanol to prepare a mixed solution as the catalyst precursor, and prepare Ni(NO 3 ) 2 And Mg(NO 3 ) 2 The concentration is 0.1mol / L, Ni(NO 3 ) 2 With Mg(NO 3 ) 2 A mixed solution with a molar ratio of 3:1;
[0037] 2) Drop the above-mentioned mixed solution evenly on the molybdenum platform and let it dry naturally;
[0038] 3) Wrap the tin wire in a ring shape eight times to pad under the molybdenum table, and place them on the deposition table in the chamber of the DC plasma jet chemical vapor deposition equipment;
[0039] 4) Close the vacuum chamber and turn on the vacuum pump and water pump for vacuuming. When the pump pressure is less than 3kpa, turn on the Roots pump. When the pump pressure is less than 0...
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Abstract
The invention relates to a preparation method of a carbon nano tube. A direct current plasma injection chemical vapour deposition system is adopted for preparing the carbon nano tube. The preparation method comprises the following steps: by taking a mixed solution of nickel nitrite and magnesium nitrite as a catalyst precursor, dropping the mixed solution on a substrate such as molybdenum, zirconium or the like; airing and then placing the substrates on a deposition platform in a cavity of direct current plasma injection chemical vapour deposition equipment; discharging a direct-current arc so that argon and hydrogen form high temperature plasma; decomposing and reducing the catalyst solution by the high temperature plasma, so as to generate a Ni/MgO catalyst; and after hydrocarbon gas isintroduced, cracking the hydrocarbon gas by using the high temperature plasma, and then injecting the cracked hydrocarbon gas on the substrate so that the carbon nano tube is formed in the presence of the catalyst. The preparation method provided by the invention has the advantages that: the catalyst is obtained while the carbon nano tube directly grows, preparation process is simple, deposition speed is fast, and deposition quality is good; and meanwhile, the bamboo-joint-like carbon nano tube is generated, and the prepared carbon nano tube has larger diameter, good crystallinity, no windingand good dispersibility.
Description
Technical field [0001] The invention relates to a preparation technology of carbon nanotubes, in particular to a method for preparing carbon nanotubes by using a direct current plasma jet chemical vapor deposition system. Background technique [0002] Since the discovery of carbon nanotubes in 1991, carbon nanotubes have become a research focus in the field of nanoelectronic devices and electrochemical biosensing due to their unique mechanical, thermal, electrical properties and broad application prospects. As an allotrope of carbon, carbon nanotubes are hollow tubes formed by curling sheet-like graphene, with a complete structure and the strongest c-c covalent bond. The excellent performance of carbon nanotubes is unique and can be used as nanoprobes, electronic devices, field emission devices, hydrogen storage materials, etc. Its synthesis and application have become the forefront of today's carbon material research. However, there are great difficulties in practical applicati...
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