Method for making ferrocene-embedded multi-wall carbon nanotubes

Patent metadata

Field	Value
Publication number	US-10093545-B2
Application number	US-201815960109-A
Country	US
Kind code	B2
Filing date	Apr 23, 2018
Priority date	Oct 7, 2015
Publication date	Oct 9, 2018
Grant date	Oct 9, 2018

Abstract

A method for preparing multi-wall carbon nanotubes comprising atomizing a precursor solution comprising an aromatic hydrocarbon and a carrier gas. The mixture is then injected through an ultrasonic atomization system to form atomized precursor droplets. Then by injecting the atomized precursor droplets from the top of a vertical chemical vapor deposition reactor, the droplets can then react with a reaction gas in the reactor vessel to form a film that adsorbs to a growth surface in the reactor vessel. Layer by layer multi-wall carbon nanotubes are formed. This method is repeated to form layers of the multi-wall carbon nanotubes. The nanotubes formed have an outer diameter of 10 nm-51 nm and a length to diameter aspect ratio of 7200-13200.

First claim

The invention claimed is:

1. A method for making ferrocene-embedded multi-wall carbon nanotubes, comprising:
atomizing a precursor solution comprising xylene, ferrocene and a carrier gas, wherein the precursor solution is injected through an ultrasonic atomization system comprising an atomizing nozzle, a nozzle stem, and an ultrasonic generating unit to form ultrasonic atomized precursor droplets;
injecting the ultrasonic atomized precursor droplets from the top of a vertical chemical vapor deposition reactor into a preheating zone;
reacting a reaction gas with the ultrasonic atomized precursor droplets in the vertical chemical vapor deposition reactor to form a film precursor that adsorbs to a growth surface in the vertical chemical vapor deposition reactor to form a layer of multi-wall carbon nanotubes comprising ferrocene particles embedded therein; and
repeating the atomizing, the injecting of the ultrasonic atomized precursor molecule, and the reacting until one or more layers of the multi-wall carbon nanotubes are formed and then removing the multi-wall carbon nanotubes from the growth surface;
wherein the multi-wall carbon nanotubes have an outer diameter of 10 nm-51 nm, a length to diameter aspect ratio of 7200-13200.

2. The method of claim 1 , wherein the carrier gas is a inert gas.

3. The method of claim 2 , wherein the inert gas is argon.

4. The method of claim 1 , wherein the atomizing nozzle has a 0.1-0.2 cm aperture and a radial spray angle of 125° -140°.

5. The method of claim 1 , wherein the vertical chemical vapor deposition reactor has at least four sections: the preheating zone, a reaction zone, a cooling zone and a collector.

6. The method of claim 5 , wherein the reacting takes place in the reaction zone, which is heated by a furnace to a temperature of 750° C.-1100° C.

7. The method of claim 1 , wherein the reacting takes place at a pressure less than 1.5 bar and a constant temperature.

8. The method of claim 1 , wherein the vertical chemical vapor deposition reactor is a hot-wall reactor.

Assignees

• Univ King Fahd Pet & Minerals

Inventors

• Malaibari Zuhair Omar
• Atieh Muataz Ali
• RABBANI Fahad Ali

Classifications

• C01B2202/36

  Diameter · CPC title

• C23C16/26

  Deposition of carbon only · CPC title

• C23C16/4418

  Methods for making free-standing articles (C23C16/01 takes precedence) · CPC title

• C23C16/452

  by activating reactive gas streams before {their} introduction into the reaction chamber, e.g. by {ionisation} or addition of reactive species · CPC title

• C01B32/16 Primary

  Preparation · CPC title