Iron oxide nanoparticle impregnated mesoporous silicas as platforms for the growth of carbon nanotubes

被引:30
作者
Barreca, D.
Blau, W. J.
Croke, G. M.
Deeney, F. A.
Dillon, F. C. [1 ]
Holmes, J. D.
Kufazvinei, C.
Morris, M. A.
Spalding, T. R.
Tondello, E.
机构
[1] Univ Coll Cork, Dept Chem, Cork, Ireland
[2] Univ Padua, Dept Chem, CNR, INSTM, I-35131 Padua, Italy
[3] Univ Dublin Trinity Coll, Dept Phys, Dublin 2, Ireland
[4] Univ Coll Cork, Dept Phys, Cork, Ireland
关键词
mesoporous silica; carbon nanotubes; catalytic chemical vapour deposition; mossbauer spectroscopy; transmission electron microscopy;
D O I
10.1016/j.micromeso.2007.01.041
中图分类号
O69 [应用化学];
学科分类号
081704 ;
摘要
Iron oxide nanoparticles have been deposited on the exterior of and inside the pores of hexagonal mesoporous silica by a direct synthesis technique with iron phthalocyanine as precursor. Iron loadings were between 0.4 wt.% - 3.2 wt.%. XPS and Mossbauer spectroscopic studies showed that the initial form of the iron oxide nanoparticles was [Fe2O3]. Samples of these iron-loaded materials were stirred in nitric acid to remove the iron oxide existing on the exterior surface of the silica. No significant loss in mesophase ordering was seen in the TEM, PXRD or nitrogen physisorption analysis of the acid washed samples. Both as-prepared and acid-washed silicas were used to grow multi-walled carbon nanotubes (MWCNTs) from acetylene feedstock in a catalytic chemical vapour deposition reactor at 800 degrees C. In both systems the density of the carbon nanotubes (CNTs) was found to increase with increasing metal loadings. Whereas the as-prepared samples produced CNTs with a range of diameters from 10 nm to 90 run, the acid treated samples showed CNTs with much more uniform diameters between 5 nm - 15 nm. Raman spectroscopy of the products showed that the carbon nanotubes were highly graphitised and of good quality. (C) 2007 Elsevier Inc. All rights reserved.
引用
收藏
页码:142 / 149
页数:8
相关论文
共 47 条
[1]   CVD growth of single-walled carbon nanotubes with narrow diameter distribution over Fe/MgO catalyst and their fluorescence spectroscopy [J].
Ago, H ;
Imamura, S ;
Okazaki, T ;
Saitoj, T ;
Yumura, M ;
Tsuji, M .
JOURNAL OF PHYSICAL CHEMISTRY B, 2005, 109 (20) :10035-10041
[2]   Synthesis, characterization, and stability of Fe-MCM-41 for production of carbon nanotubes by acetylene pyrolysis [J].
Amama, PB ;
Lim, S ;
Ciuparu, D ;
Yang, YH ;
Pfefferle, L ;
Haller, GL .
JOURNAL OF PHYSICAL CHEMISTRY B, 2005, 109 (07) :2645-2656
[3]   Strain induced photoluminescence from silicon and germanium nanowire arrays [J].
Audoit, G ;
Ní Mhuircheartaigh, T ;
Lipson, SM ;
Morris, MA ;
Blau, WJ ;
Holmes, JD .
JOURNAL OF MATERIALS CHEMISTRY, 2005, 15 (45) :4809-4815
[4]   Narrow (n,m)-distribution of single-walled carbon nanotubes grown using a solid supported catalyst [J].
Bachilo, SM ;
Balzano, L ;
Herrera, JE ;
Pompeo, F ;
Resasco, DE ;
Weisman, RB .
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2003, 125 (37) :11186-11187
[5]  
Barreca D., 2001, Surface Science Spectra, V8, P240, DOI 10.1116/11.20020302
[6]   Influence of process parameters on the morphology of Au/SiO2 nanocomposites synthesized by radio-frequency sputtering [J].
Barreca, D ;
Gasparotto, A ;
Tondello, E ;
Bruno, G ;
Losurdo, M .
JOURNAL OF APPLIED PHYSICS, 2004, 96 (03) :1655-1665
[7]   THE USE OF FE-57 MOSSBAUER-SPECTROSCOPY IN ASSIGNING THE TYPES OF IRON CARBONYL UNITS PRESENT IN FE-CONTAINING CLUSTERS [J].
BRINT, RP ;
COLLINS, MP ;
SPALDING, TR ;
DEENEY, FA .
JOURNAL OF ORGANOMETALLIC CHEMISTRY, 1983, 258 (03) :C57-C60
[8]   STUDY BY PHOTOELECTRON-SPECTROSCOPY OF SURFACE DEGRADATION OF FES2, CUFES2 ZNS AND PBS EXPOSED TO AIR AND WATER [J].
BRION, D .
APPLICATIONS OF SURFACE SCIENCE, 1980, 5 (02) :133-152
[9]  
CARTHY B, 2001, NANOTECHNOLOGY, V12, P187
[10]  
Chambers S. A., 1998, Surface Science Spectra, V5, P219, DOI 10.1116/1.1247873