Efficient Synthesis of Carbon Nanotubes over Zeolites By Thermal Chemical Vapor Deposition

2008 ◽  
Author(s):  
A. A. Azira ◽  
N. F. A. Zainal ◽  
T. Soga ◽  
S. Abdullah ◽  
M. Rusop ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Chemical Vapor Deposition ◽  
Vapor Deposition ◽  
Chemical Vapor ◽  
Efficient Synthesis ◽  
Thermal Chemical Vapor Deposition ◽  
Synthesis Of Carbon Nanotubes

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.

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.

Growth of Carbon Nanotubes Using MgO Supported Mo-Co Catalysts by Thermal Chemical Vapor Deposition Technique

2013 ◽  
Vol 24 ◽  
pp. 46-57 ◽  
Author(s):  
C. Santhosh ◽  
M. Saranya ◽  
S. Felix ◽  
R. Ramachandran ◽  
N. Pradeep ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Chemical Vapor Deposition ◽  
Vapor Deposition ◽  
Chemical Properties ◽  
Chemical Vapor ◽  
Simple Method ◽  
Thermal Chemical Vapor Deposition ◽  
Co Catalysts ◽  
Vapor Deposition Technique ◽  
Synthesis Of Carbon Nanotubes

A simple method is developed for the synthesis of carbon nanotubes (CNTs) using Mo-Co/MgO catalyst by a thermal chemical vapor deposition (CVD) technique. Acetylene was used as the source of carbon and nitrogen as carrier gas. A series of MgO supported Mo-Co catalysts were prepared by the combustion route using urea as the fuel at different stoichiometric ratios. It was found that a higher yield of carbon nanotubes was obtained by the developed catalysts. Also, the addition of molybdenum to Co/MgO catalysts could remarkably increase the yield and also improve the quality of CNTs from thermal CVD with acetylene as precursor gas. The morphology of the catalysts and CNTs obtained was studied by field emission scanning electron microscope (FE-SEM). Other techniques like Raman spectroscopy and XRD were also employed to know the physico-chemical properties of the samples.

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