David Kirkpatrick

July 17, 2010

Manufacturing carbon nanotubes at room temperature

This document outlines a method of creating carbon nanotubes that doesn’t require high temperature or pressure. This potentially will dramtically lower the cost of manufacturing carbon nanotubes.

From the link:

We develop a new chemical route to carbon nanotubes at room temperature. Graphite powder was immersed in a mixed solution of nitric and sulphuric acid with potassium chloride. After heating the solution up to 70‰ and leaving them in the air for 3 days, we obtained carbon nanotube bundles. The process could readily give an easy way of preparing carbon nanotubes without high temperature and high pressure. We develop a new chemical route to carbon nanotubes at room temperature. Graphite powderwas immersed in a mixed solution of nitric and sulphuric acid with potassium chloride. After heatingthe solution up to 70‰ and leaving them in the air for 3 days, we obtained carbon nanotube bundles.The process could readily give an easy way of preparing carbon nanotubes without high temperatureand high pressure.
And:
In summary, we have presented a simple chemical method for producing CNTs in liquid solution at 70‰ without any pressure treatment. The CNTs form bundles containing crystalized and multi-walled single CNTs with a diameter of around 14.6nm. The electron diffraction patterns demonstrate its zigzag edge structure. We expect this new synthesizing method may produce cheap CNTs and as a result open an easy access to the industrial device based on CNTs.
Here’s an illustration and an image from the link:
FIG. 1: (a) mixture of graphite, sulfuric acid (H2SO4, and nitric acid (HNO3). (b) potassium chlorate (KClO3) was put in the solution. (c) floating carbons produced from the pro- cess (b) were transferred into DI water. (d) the sample was dried after filtration. The process (b) and (c) were repeated 4 times.

FIG. 3: (a) transmission electron microscope (TEM) images of CMT bundles. Panels (b) and (c) magnificently present the regions pointed by number 1 and 2 in panel (a), respectively. A single CNT noticed by an arrow in panel (b) proves CNT’s flexibility. (d) the enlarged region of panel (c) (arrow 3), revealing a multi-walled nanotube with a diameter of 14.6nm.

1 Comment »

  1. […] Manufacturing carbon nanotubes at room temperature « David Kirkpatrick […]

    Pingback by Air Ionizer - would air ionizer/purifier effect on room temperature ? - Compare Models — July 21, 2010 @ 12:27 am


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