Skip to Content
Merck
  • Synthesis and characterization of carbon nanofibers by catalytic chemical vapor deposition using non-ferromagnetic metal complexes.

Synthesis and characterization of carbon nanofibers by catalytic chemical vapor deposition using non-ferromagnetic metal complexes.

Journal of nanoscience and nanotechnology (2014-04-18)
Chi-Jung Su, Wei-Li Yuan, Tzu-Wei Lai, Chien-Ming Lei
ABSTRACT

Carbon nanofibers (CNFs) have wide applications in energy storage devices, electrically conducting composites, selective adsorbents, and catalyst supports. Catalytic chemical vapor deposition was carried out in this work to synthesize CNFs at mild temperatures of 700 and 800 degrees C. Non-ferromagnetic metal complexes of La, Nb, and Ti, spread on porous NaX-type zeolite support, were tested as new catalyst. CNFs ranging from 30 to 200 nm in diameter were obtained. Images of transmission electron microscopy showed encapsulated transition-metal nanoparticles by CNFs. X-ray diffraction patterns revealed the crystalline structures of La (FCC), Nb (BCC), and Ti (HCP) formed over zeolite. Magnetic hysteresis loops showed superconductivity from the CNF-encapsulated Nb at 2 K. Raman spectra showed that all the samples possessed graphitic and amorphous carbon structures. Based on the SEM images and Raman spectra, the three metals all catalyzed the synthesis of CNFs.

MATERIALS
Product Number
Brand
Product Description

Sigma-Aldrich
Activated Charcoal Norit®, Norit® SX2, powder, from peat, multi-purpose activated charcoal, steam activated and acid washed
Sigma-Aldrich
Activated Charcoal Norit®, Norit® GAC 1240W, from coal, for potable water processing, steam activated, granular
Sigma-Aldrich
Activated Charcoal Norit®, Norit® CA1, wood, chemically activated, powder
Sigma-Aldrich
Activated Charcoal Norit®, Norit® RB3, for gas purification, steam activated, rod
Sigma-Aldrich
Activated Charcoal Norit®, Norit® PK 1-3, from peat, steam activated, granular
Sigma-Aldrich
Activated Charcoal Norit®, Norit® SX ultra, from peat, corresponds U.S. Food chemicals codex (3rd Ed.), steam activated and acid washed, highly purified, powder
Sigma-Aldrich
Carbon, nanopowder, <100 nm particle size (TEM)
Millipore
Activated charcoal, suitable for GC
Supelco
Activated charcoal, powder
Supelco
Activated Charcoal Norit®, Norit® RBAA-3, rod
Sigma-Aldrich
Activated charcoal, suitable for cell culture, suitable for plant cell culture
Supelco
Activated charcoal, for the determination of AOX, 50-150 μm particle size
Supelco
Activated charcoal, puriss. p.a., powder
Sigma-Aldrich
Carbon, glassy, spherical powder, 2-12 μm, 99.95% trace metals basis
Carbon, foil, 150x150mm, thickness 5.0mm, rigid graphite, medium grain size, 99.5%
Carbon, foil, 25x25mm, thickness 0.25mm, rigid graphite, fine grain size, 99.997%
Carbon, foil, 500x500mm, thickness 0.5mm, flexible graphite, 99.8%
Carbon, foil, 250x250mm, thickness 0.35mm, flexible graphite, 99.8%
Carbon, rod, 300mm, diameter 5.0mm, graphite, 100%
Carbon, foil, 10x10mm, thickness 2.0mm, hOpg
Carbon, foil, 25x25mm, thickness 0.25mm, rigid graphite, fine grain size, 99.95%
Carbon, foil, 12.5x12.5mm, thickness 0.125mm, rigid graphite, fine grain size, 99.95%
Carbon, foil, 50x50mm, thickness 0.5mm, flexible graphite, 99.8%
Carbon, foil, 50x50mm, thickness 0.125mm, rigid graphite, fine grain size, 99.95%
Carbon, foil, 250x250mm, thickness 1.0mm, flexible graphite, 99.8%
Carbon, foil, 150x150mm, thickness 0.125mm, rigid graphite, fine grain size, 99.95%
Carbon, foil, 12mm disks, thickness 0.5mm, rigid graphite, fine grain size, 99.95%
Carbon, foil, 25x25mm, thickness 0.5mm, rigid graphite, fine grain size, 99.997%
Carbon, foil, 150x150mm, thickness 0.5mm, rigid graphite, fine grain size, 99.95%
Carbon, foil, 500x500mm, thickness 0.2mm, flexible graphite, 99.8%