Enhanced Synthesis of Carbon Nanomaterials Using Acoustically Excited Methane Diffusion Flames
نویسندگان
چکیده
منابع مشابه
Enhanced Synthesis of Carbon Nanomaterials Using Acoustically Excited Methane Diffusion Flames
Acoustically modulated methane jet diffusion flames were used to enhance carbon nanostructure synthesis. A catalytic nickel substrate was employed to collect the deposit materials at sampling position z = 10 mm above the burner exit. The fabrication of carbon nano-onions (CNOs) and carbon nanotubes (CNTs) was significantly enhanced by acoustic excitation at frequencies near the natural flickeri...
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We have conducted an experimental study to investigate the synthesis of multi-walled carbon nanotubes (CNTs) in counterflow methane–air diffusion flames, with emphasis on effects of catalyst, temperature, and the air-side strain rate of the flow on CNTs growth. The counterflow flame was formed by fuel (CH4 or CH4 + N2) and air streams impinging on each other. Two types of substrates were used t...
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Introduction A hydrocarbon flame can naturally and readily provide an appropriate high-temperature environment with abundant radical concentrations required for the growth of carbon nanotubes (CNTs) [1] or carbon nano-onions (CNOs) [2]. Therefore, flame synthesis shows a more promising potential for inexpensive and mass production of high-purity carbon nanostructures than other synthesis method...
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Vertically well-aligned multi-walled carbon nanotubes (MWNTs) with uniform diameters ( 15 nm) were grown on catalytic probes at high yield rates in an inverse diffusion flame (IDF) of a co-flow jet configuration using methane as fuel. Varied parameters investigated included: alloy composition (e.g. Fe, Ni/Cu, Ni/Cr/Fe), sampling positions within the flame structure, and voltage bias applied to ...
متن کاملCarbon nanotube synthesis on catalytic metal alloys in methane/air counterflow diffusion flames
Various morphologies of multi-walled carbon nanotubes (MWNTs) are grown catalytically on metalalloy probes in counterflow diffusion flames using methane as fuel. Carbon nanotube (CNT) properties and morphologies are investigated as functions of local gas-phase temperatures, C-related species concentrations (e.g. C2H2, CO), sampling positions, C2H2 adding to the fuel, and metal-alloy composition...
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ژورنال
عنوان ژورنال: Materials
سال: 2015
ISSN: 1996-1944
DOI: 10.3390/ma8084805