eprintid: 12171
rev_number: 2
eprint_status: archive
userid: 1
dir: disk0/00/01/21/71
datestamp: 2023-11-10 03:26:43
lastmod: 2023-11-10 03:26:43
status_changed: 2023-11-10 01:17:03
type: article
metadata_visibility: show
creators_name: Shukrullah, S.
creators_name: Naz, M.Y.
creators_name: Mohamed, N.M.
creators_name: Ibrahim, K.A.
creators_name: Ghaffar, A.
creators_name: AbdEl-Salam, N.M.
title: Synthesis of MWCNT forests with alumina-supported Fe2O3 catalyst by using a floating catalyst chemical vapor deposition technique
ispublished: pub
keywords: Alumina; Aluminum oxide; Carbon; Chemical vapor deposition; Decomposition; Ethylene; Forestry; Hematite; Metal nanoparticles; Multiwalled carbon nanotubes (MWCN), Active surface area; Alumina-supported; Elemental compositions; Ethylene molecules; Fast decomposition; Floating catalyst; Multi-walled CNT; Optimized conditions, Catalyst supports
note: cited By 7
abstract: In this study, multiwalled CNT bundles were synthesized with an alumina-supported Fe2O3 catalyst by using a floating catalyst chemical vapor deposition (FCCVD) technique. The metal catalyst was synthesized by dispersing Fe2O3 on alumina support. Ethylene molecules were decomposed over different amounts of metal nanoparticles in a FCCVD reactor. The CVD temperature was elevated from 600°C to 1000°C. The large active surface area of the metal nanobuds promoted the decomposition of a carbon precursor and the fast growth of CNT bundles. Least dense bundles of varying heights were observed at lower CVD temperatures of 600°C and 700°C. At 800°C, CVD process conditions were found suitable for the fast decomposition of hydrocarbon. The relatively better yield of well-structured CNTs was obtained with a catalyst weight of 0.3 g at 800°C. Above 800°C, CNT forests start losing alignment and height. The forest density was also decreased at temperatures above the optimum. The elemental composition of CNT bundles revealed the presence of carbon, aluminium, oxygen, and iron in percentages of 91, 0.76, 8.2, and 0.04, respectively. A very small ID to IG ratio of 0.22 was calculated for CNTs grown under optimized conditions. © 2019 Shazia Shukrullah et al.
date: 2019
publisher: Hindawi Limited
official_url: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85065862079&doi=10.1155%2f2019%2f4642859&partnerID=40&md5=d73ed1da4137d58a70fa8031076c8fcd
id_number: 10.1155/2019/4642859
full_text_status: none
publication: Journal of Nanomaterials
volume: 2019
refereed: TRUE
issn: 16874110
citation:   Shukrullah, S. and Naz, M.Y. and Mohamed, N.M. and Ibrahim, K.A. and Ghaffar, A. and AbdEl-Salam, N.M.  (2019) Synthesis of MWCNT forests with alumina-supported Fe2O3 catalyst by using a floating catalyst chemical vapor deposition technique.  Journal of Nanomaterials, 2019.   ISSN 16874110