Carbon nanostructures grown on 3D silicon carbide foams: Role of intermediate silica layer and metal growth

Saheed A. Ganiyu, Oki Muraza, Abbas S. Hakeem, Khalid Alhooshani, Muataz A. Atieh

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

Carbon nanostructures (CNSs) in the form of fibers and spheres have been successfully grown on 3 dimensional (3D) macroscopic silicon carbide (SiC) foams with the aid of mesoporous silica-films as interfacial layer via ethylene decomposition on nickel and iron as growth catalysts using chemical vapor deposition (CVD). The effect of growth temperature from 600 to 900°C on morphology, diameter and specific surface area of as-grown CNSs was studied. The as-grown CNSs were characterized by field emission scanning electron microscope (FE-SEM) and transmission electron microscope (TEM) to examine the morphology, diameter, microstructure and defect. Crystallinity and degree of graphitization were determined by X-ray diffraction and Raman spectrometer. Textural properties such as specific surface area, pore size and pore volume were measured by nitrogen gas adsorption-desorption. Uniform distribution of CNSs on 3D SiC-foam was obtained at 700°C for short synthesis time (30min), as well as high surface area of above 100m2/g. Degree of graphitization of CNSs grown on modified SiC substrates by using Ni as growth catalyst was higher than the one with the Fe-growth catalyst.

Original languageEnglish
Pages (from-to)110-118
Number of pages9
JournalChemical Engineering Journal
Volume258
DOIs
Publication statusPublished - 15 Dec 2014

    Fingerprint

Keywords

  • CVD
  • Carbon nanostructures
  • Mesoporous silica-films
  • Metal growth
  • Silicon-carbide foam

ASJC Scopus subject areas

  • Chemistry(all)
  • Environmental Chemistry
  • Chemical Engineering(all)
  • Industrial and Manufacturing Engineering

Cite this