Influence of Carbon Source and Fe-Catalyst Support on the Growth of Multi-Walled Carbon Nanotubes

2009 ◽  
Vol 9 (6) ◽  
pp. 3815-3823 ◽  
Author(s):  
M. G. Donato ◽  
S. Galvagno ◽  
M. Lanza ◽  
G. Messina ◽  
C. Milone ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Carbon Source ◽  
Catalyst Support ◽  
Fe Catalyst ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes

A novel strategy for the synthesis of sulfur-doped carbon nanotubes as a highly efficient Pt catalyst support toward the methanol oxidation reaction

2017 ◽  
Vol 5 (36) ◽  
pp. 19467-19475 ◽  
Author(s):  
Jing-Jing Fan ◽  
You-Jun Fan ◽  
Rui-Xiang Wang ◽  
Sheng Xiang ◽  
Hua-Guo Tang ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Oxidation Reaction ◽  
Catalyst Support ◽  
Pt Nanoparticles ◽  
Pt Catalyst ◽  
Methanol Oxidation Reaction ◽  
Multi Walled Carbon Nanotubes ◽  
Novel Strategy ◽  
Walled Carbon Nanotubes ◽  
Functionalized Mwcnts

Sulfur-doped multi-walled carbon nanotubes (S-MWCNTs) derived from PEDOT-functionalized MWCNTs can significantly improve the dispersion of supported Pt nanoparticles and enhance their electrocatalytic performance for the MOR.

Purification of Multi-Walled Carbon Nanotubes Grown by Thermal CVD on Fe-Based Catalyst

2006 ◽  
Vol 48 ◽  
pp. 50-54 ◽  
Author(s):  
Th. Dikonimos Makris ◽  
L. Giorgi ◽  
R. Giorgi ◽  
Nicola Lisi ◽  
Elena Salernitano ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Catalyst Support ◽  
Secondary Phase ◽  
Metal Catalyst ◽  
Purification Method ◽  
Thermal Cvd ◽  
Aluminum Ions ◽  
Before And After ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes

Aiming at the purpose of using carbon nanotubes as secondary phase in composite materials, removal of metal catalyst, catalyst support and amorphous carbon is crucial to make the most of the required properties. A purification method was developed to remove the metal catalyst from multi-walled nanotubes grown by thermal CVD. A nanosized Fe-based catalyst, prepared by coprecipitation of iron and aluminum ions, followed by solid state reaction, was used to catalyze the growth. Carbon nanotubes were subjected to acid purification and a comparison between nitric acid and a mixture of nitric and hydrochloric acid for the removal of Fe and Fe oxides is provided. Morphological and spectroscopic analyses of the materials were performed, both before and after the purification processes.

Characterization of spin-capable multi-walled carbon nanotubes grown an a Fe catalyst film under helium gas

2012 ◽  
Vol 60 (11) ◽  
pp. 1886-1890
Author(s):  
Kyung Hwan Lee ◽  
Lawrence J. Overzet ◽  
Gil S. Lee ◽  
Duck J. Yang ◽  
Byeong-Jun Lee ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Catalyst Film ◽  
Fe Catalyst ◽  
Helium Gas ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes

Influence of Acid and Thermal Treatments on Properties of Carbon Nanotubes

2013 ◽  
Vol 832 ◽  
pp. 394-398 ◽  
Author(s):  
Omid Akbarzadeh ◽  
Noor Asmawati Mohd Zabidi ◽  
Bawadi Abdullah ◽  
Duvvuri Subbarao
Keyword(s):  
Carbon Nanotubes ◽  
Thermal Treatment ◽  
Morphological Changes ◽  
Catalyst Support ◽  
Thermal Treatments ◽  
Tubular Furnace ◽  
Surface Areas ◽  
Multi Walled Carbon Nanotubes ◽  
Ar Gas ◽  
Walled Carbon Nanotubes

The application of carbon nanotubes as a catalyst support has received considerable attention recently. The influence of acid and thermal treatments on the properties of multi-walled carbon nanotubes (MWCNTs) is presented in this paper. MWCNTs were treated with 65 wt% HNO3 at the 120 °C for 14 h in order to open the caps and introduce functional groups on the MWCNTs. Then thermal treatment was carried out at 600, 700, 800, 900 °C for 3 h in flowing Ar gas in a tubular furnace. The MWCNTs were characterized by N2- adsorption, FESEM and Raman spectroscopy. The thermal treatment resulted in slight morphological changes of the MWCNTs. The acid and thermal treatments also increased the BET surface areas and pore volumes of the MWCNTs.

VERTICALLY ALIGNED CARBON NANOTUBES AT DIFFERENT TEMPERATURES BY SPRAY PYROLYSIS TECHNIQUES

2006 ◽  
Vol 20 (29) ◽  
pp. 4965-4972 ◽  
Author(s):  
RAKESH A. AFRE ◽  
T. SOGA ◽  
T. JIMBO ◽  
MUKUL KUMAR ◽  
Y. ANDO ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Spray Pyrolysis ◽  
Morphological Characteristics ◽  
Catalyst Precursor ◽  
Simple Method ◽  
Fe Catalyst ◽  
Different Temperatures ◽  
Multi Walled Carbon Nanotubes ◽  
Vertically Aligned ◽  
Walled Carbon Nanotubes

Vertically aligned arrays of multi-walled carbon nanotubes (VACNTs) were grown by spray pyrolysis of turpentine oil and ferrocene mixture at temperatures higher than 700°C. Using this simple method, we report the successful growth of vertically aligned nanotubes of ~300μm length and diameter in the range of ?20–80 nm on Si (100) substrate. The ferrocene acts as an in situ Fe catalyst precursor, forming the nano-sized metallic iron particles for formation of VACNTs on the Si substrate. The morphological characteristics of VACNTs are confirmed by SEM, TEM and Raman spectroscopy and growth mechanism is discussed in short.

scholarly journals Multi-walled carbon nanotube-based composite materials as catalyst support for water–gas shift and hydroformylation reactions

RSC Advances ◽  
2019 ◽  
Vol 9 (47) ◽  
pp. 27732-27742 ◽  
Author(s):  
Patrick Wolf ◽  
Morten Logemann ◽  
Markus Schörner ◽  
Laura Keller ◽  
Marco Haumann ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Ionic Liquid ◽  
Liquid Phase ◽  
Catalyst Support ◽  
Water Gas Shift ◽  
Supported Ionic Liquid ◽  
Multi Walled Carbon Nanotube ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes ◽  
Water Gas

Multi-walled carbon nanotubes (MWCNT) show promising behavior in supported ionic liquid phase (SILP) catalyzed hydroformylation and water–gas shift reactions.

Selective Synthesis of Single/Double/Multi-walled Carbon Nanotubes on MgO-Supported Fe Catalyst

2008 ◽  
Vol 29 (11) ◽  
pp. 1138-1144 ◽  
Author(s):  
Qiang ZHANG ◽  
Mengqiang ZHAO ◽  
Jiaqi HUANG ◽  
Weizhong QIAN ◽  
Fei WEI
Keyword(s):  
Carbon Nanotubes ◽  
Selective Synthesis ◽  
Fe Catalyst ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes
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