High Efficient Synthesis of Carbon Nanocoils by Catalysts Produced by a Fe and Sn Containing Solution

2009 ◽  
Vol 60-61 ◽  
pp. 251-255 ◽  
Author(s):  
Da Wei Li ◽  
Lu Jun Pan ◽  
Juan Juan Qian ◽  
He Ma
Keyword(s):  
Carbon Nanotubes ◽  
Chemical Vapor Deposition ◽  
Vapor Deposition ◽  
Chemical Vapor ◽  
Efficient Synthesis ◽  
Key Factors ◽  
Thermal Chemical Vapor Deposition ◽  
Helical Growth ◽  
High Efficient ◽  
Composition Ratios

Chemical vapor deposition, Catalyst, Carbon nanocoils, High efficient growth Abstract: Carbon nanocoils (CNCs) were prepared by thermal chemical vapor deposition (CVD) using a Fe and Sn containing solution as the catalyst predecessor. The solutions of Fe2(SO4)3/SnCl2, FeCl3/SnCl2 and Fe(NO3)3/SnCl2 with the mol ratios of 3:0.1 to 3:1 were used as catalysts. Comparing the catalysts in different composition ratios with the grown deposits after CVD, we found that the optimum mol ratio between Fe and Sn is 6:0.1. It is noted that the catalyst combination of Fe2(SO4)3 /SnCl2 obviously increases the quantity of the grown carbon deposits indicating that it has the largest catalytic activity among the three kinds of combinations. Large surface area of catalyst films formed by release of SO3 from the decomposition of Fe2(SO4)3 over the temperature of 480 °C is very good for the carbon nanocoils growth and the introduction of sulfide impurities are the key factors leading to the high efficient growth for carbon nanocoils. It is known that Fe-additions lead to the growth of carbon nanotubes or nanofibers, while Sn induces their helical growth and a little sulfur impurities may induce the efficient growth of carbon nanocoils.

Highly efficient synthesis of carbon nanocoils on alumina spheres

RSC Advances ◽  
2016 ◽  
Vol 6 (36) ◽  
pp. 30125-30129 ◽  
Author(s):  
Ruixue Cui ◽  
Lujun Pan ◽  
He Ma ◽  
Peng Wang ◽  
Muhammad Asif
Keyword(s):  
Carbon Nanotubes ◽  
Chemical Vapor Deposition ◽  
Vapor Deposition ◽  
Chemical Vapor ◽  
Chemical Vapor Deposition Method ◽  
Deposition Method ◽  
Efficient Synthesis ◽  
Thermal Chemical Vapor Deposition ◽  
Molar Ratios ◽  
Highly Efficient

Carbon nanocoils (CNCs) and carbon nanotubes (CNTs) can be selectively synthesized on the surfaces of alumina spheres using an Fe2(SO4)3/SnCl2 catalyst with different molar ratios of Fe to Sn by a thermal chemical vapor deposition method.

Structure Controlled Synthesis of Vertically Aligned Carbon Nanotubes Using Thermal Chemical Vapor Deposition Process

2010 ◽  
Vol 133 (3) ◽  
Author(s):  
Myung Gwan Hahm ◽  
Young-Kyun Kwon ◽  
Ahmed Busnaina ◽  
Yung Joon Jung
Keyword(s):  
Carbon Nanotubes ◽  
Chemical Vapor Deposition ◽  
Vapor Deposition ◽  
Large Scale ◽  
Chemical Vapor ◽  
Controlled Synthesis ◽  
Full Potential ◽  
Thermal Chemical Vapor Deposition ◽  
Vertically Aligned ◽  
Walled Carbon Nanotubes

Due to their unique one-dimensional nanostructure along with excellent mechanical, electrical, and optical properties, carbon nanotubes (CNTs) become a promising material for diverse nanotechnology applications. However, large-scale and structure controlled synthesis of CNTs still have many difficulties due to the lack of understanding of the fundamental growth mechanism of CNTs, as well as the difficulty of controlling atomic-scale physical and chemical reactions during the nanotube growth process. Especially, controlling the number of graphene wall, diameter, and chirality of CNTs are the most important issues that need to be solved to harness the full potential of CNTs. Here we report the large-scale selective synthesis of vertically aligned single walled carbon nanotubes (SWNTs) and double walled carbon nanotubes (DWNTs) by controlling the size of catalyst nanoparticles in the highly effective oxygen assisted thermal chemical vapor deposition (CVD) process. We also demonstrate a simple but powerful strategy for synthesizing ultrahigh density and diameter selected vertically aligned SWNTs through the precise control of carbon flow during a thermal CVD process.

Large field emission from carbon nanotubes grown on patterned catalyst thin film by thermal chemical vapor deposition

2002 ◽  
Vol 323 (1-4) ◽  
pp. 171-173 ◽  
Author(s):  
Takashi Ikuno ◽  
Tetsuro Yamamoto ◽  
Motoki Kamizono ◽  
Syunji Takahashi ◽  
Hiroshi Furuta ◽  
...  
Keyword(s):  
Thin Film ◽  
Carbon Nanotubes ◽  
Chemical Vapor Deposition ◽  
Field Emission ◽  
Vapor Deposition ◽  
Chemical Vapor ◽  
Large Field ◽  
Thermal Chemical Vapor Deposition
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