Preparation method of horizontal array carbon nano tube

Abstract

The invention discloses a preparation method of a horizontal array carbon nano tube, and relates to the preparation method of the carbon nano tube. The invention provides a preparation method of the horizontal array carbon nano tube based on a near field electrostatic spinning direct writing catalyst nanowire. The method comprises the following steps of: 1) mixing ethanol liquor of at least one metal chloride of Fe, Mo, Co, Ni, Cu and Cr with polymer liquor to obtain mixed liquor, and then, directly writing a catalyst nanowire pattern on a substrate by a near field electrostatic spinning technology; 2) removing organic matters on the catalyst nanowire for the sample obtained by the step 1); and 3) placing the sample without the organic matters on the nanowire in a heating furnace to be heated, and introducing a mixed gas of hydrogen and inert gas for reduction reaction, then maintaining the temperature, reducing the catalyst nanowire to nano metal particles with catalytic activity, and continuously heating and introducing a carbon source gas for cleavage reaction to obtain the horizontal array carbon nano tube. The method is simple to operate, high in efficiency, low in cost and easy to control.

Description

technical field [0001] The invention relates to a preparation method of carbon nanotubes (CNTs), in particular to a preparation method of controllable ultra-long horizontal array carbon nanotubes based on near-field electrospinning. Background technique [0002] Due to their excellent mechanical, thermal, acoustic, optical and electrical properties, carbon nanotubes have been widely used in many fields such as composite materials, energy storage, sensors and biomedicine. The carbon nanotubes prepared by the chemical vapor deposition method have three shapes: agglomerated carbon nanotubes, vertical array carbon nanotubes and ultra-long horizontal array carbon nanotubes, where the ultra-long horizontal array carbon nanotubes refers to the distance between the tubes Larger, parallel arrangement, orientation along the airflow, and horizontal growth of carbon nanotube aggregates on the surface of the substrate, usually the length of a single carbon nanotube can reach the order of...

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Problems solved by technology

Zhou et al [W.Zhou, Z.Han, J.Wang, et al. Copper catalyzing growth of single-walled carbon nanotubes on substrates [J]. Nano Letters, 2006, 6(12): 2987-2990.] with There are only 2-3 ultra-long carbon nanotube horizontal arrays in the range of 10 μm prepared on silicon wafers; Hong et al [S.W.Hong, T.Banks and J.A.Rogers. Improved density in aligned arrays of single-walled carbon nanotubes by sequential chemical vapor deposition on quartz[J].Adv.Mater.,2010,22:1826–1830.] Carbon nanotubes with an average density of 20-30 / μm were prepared by repeated growth, but the preparation cycle was long ,low efficiency

[0004] In addition, for the growth of carbon nanotubes on a complex substrate with a band structure, it is difficult to cover the substrate with a catalyst without contaminating other structures. Photolithography, PDMS / PMMA transfer, and nanoimprinting are often used to transfer carbon nanotubes to the substrate. However, these methods have the disadvantages of cumbersome operation, low efficiency, difficult control and high cost.

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