carbon nanotubes synthesis by chemical vapor deposition of methane over zn – fe mixed catalysts supported on alumina

Authors

a. badiei

m. azmard

m. karimi

p. zarabadi-poor

abstract

carbon nanotubes were synthesized over a series of zn-containing fe/alumina catalysts by chemical vapor deposition method at two reaction temperatures of 850 and 950 °c using methane as a carbon source. catalysts were synthesized by keeping fe concentration constant and varying zn concentration to study the effects of zn. the catalysts were characterized using x – ray powder diffraction and n2 adsorption – desorption methods which confirmed the successful synthesis of catalysts and metals particles were inserted in alumina pores. the synthesized carbon nanotubes were tested by scanning electron microscopy (sem), transmission electron microscopy (tem), thermogravimetry analysis (tga) and raman spectroscopy. sem images showed that the diameter of nanotubes almost was decreased with increasing zn content of catalysts. in raman spectroscopy, two main bands related to the carbon nanotubes were observed. further, tga results revealed that the percent of synthesized carbon nanotubes were almost increased with increasing [zn]/[fe] proportions.

Upgrade to premium to download articles

Sign up to access the full text

Already have an account?login

similar resources

Carbon Nanotubes Synthesis by Chemical Vapor Deposition of Methane over Zn – Fe Mixed Catalysts Supported on Alumina

Carbon nanotubes were synthesized over a series of Zn-containing Fe/alumina catalysts by chemical vapor deposition method at two reaction temperatures of 850 and 950 °C using methane as a carbon source. Catalysts were synthesized by keeping Fe concentration constant and varying Zn concentration to study the effects of Zn. The catalysts were characterized using X – ray powder diffraction and N2 ...

full text

The Impact of Cadmium Loading In Fe/Alumina Catalysts and Synthesis Temperature on Carbon Nanotubes Growth by Chemical Vapor Deposition Method

We evaluated the effect of Fe/Alumina Catalyst contained different Cadmium contents and two synthesis temperatures on producing carbon nanotubes by chemical vapor deposition of methane as a feedstock.  X-ray powder diffraction (XRD), N2 adsorption-desorption, scanning electron microscopy (SEM), transmission electron microscopy (TEM), Raman spectroscopy and Thermogravimetry analysis (TGA) were u...

full text

the impact of cadmium loading in fe/alumina catalysts and synthesis temperature on carbon nanotubes growth by chemical vapor deposition method

we evaluated the effect of fe/alumina catalyst contained different cadmium contents and two synthesis temperatures on producing carbon nanotubes by chemical vapor deposition of methane as a feedstock.  x-ray powder diffraction (xrd), n2 adsorption-desorption, scanning electron microscopy (sem), transmission electron microscopy (tem), raman spectroscopy and thermogravimetry analysis (tga) were u...

full text

Corrigendum: Green synthesis of carbon-supported nanoparticle catalysts by physical vapor deposition on soluble powder substrates

These errors have now been corrected in the PDF and HTML versions of the Article. This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article's Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, u...

full text

Green synthesis of carbon-supported nanoparticle catalysts by physical vapor deposition on soluble powder substrates

Metal and metal oxide nanoparticles (NPs) supported on high surface area carbon (NP/Cs) were prepared by the physical vapor deposition of bulk materials on an α-D-glucose (Glu) substrate, followed by the deposition of the NPs on carbon supports. Using Glu as a carrier for the transport of NPs from the bulk materials to the carbon support surfaces, ultrafine NPs were obtained, exhibiting a stabi...

full text

My Resources

Save resource for easier access later


Journal title:
journal of nanostructures

Publisher: university of kashan

ISSN 2251-7871

volume 4

issue 3 2014

Hosted on Doprax cloud platform doprax.com

copyright © 2015-2023