Catalytic Synthesis of Substrate-Free, Aligned and Tailored High Aspect Ratio Multiwall Carbon Nanotubes in an Ultrasonic Atomization Head CVD Reactor
| Autor: | Muataz Ali Atieh, Fahad Ali Rabbani, Zuhair Omar Malaibari, Ammar Jamie |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2016 |
| Předmět: |
chemistry.chemical_classification
Materials science Article Subject Substrate (chemistry) 02 engineering and technology Carbon nanotube Chemical vapor deposition 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences law.invention Catalysis Volumetric flow rate Hydrocarbon chemistry law Specific surface area lcsh:Technology (General) lcsh:T1-995 General Materials Science Composite material 0210 nano-technology Dispersion (chemistry) |
| Zdroj: | Journal of Nanomaterials, Vol 2016 (2016) |
| ISSN: | 1687-4129 1687-4110 |
| Popis: | Chemical vapor deposition (CVD) method has proven its benchmark, over other methods, for the production of different types of carbon nanotubes (CNT) on commercial and lab scale. In this study, an injection vertical CVD reactor fitted with an ultrasonic atomization head was used in a pilot-plant scale (height 274 cm, radius 25 cm) for semicontinuous production of multiwall carbon nanotubes (MWCNTs). p-Xylene was used as a hydrocarbon precursor in which ferrocene was dissolved and provided the cracking catalyst. Atomization of the feed solution resulted in full and even dispersion of the catalytic solution. This dispersion led to the production of high aspect ratio MWCNTs (ranging from 8,000 to 12,000) at 850°C. Different experimental parameters affecting the quality and quantity of the produced CNTs were investigated. These included temperature, reaction time, and flow rate of the reaction and carrier gases. Different properties of the produced CNTs were characterized using SEM and TEM, while TGA was used to evaluate their purity. Specific surface area of selected samples was calculated by BET. |
| Databáze: | OpenAIRE |
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