The Interaction Effects of Synthesis Reaction Temperature and Catalyst Loading on Carbon Nanotubes (CNTs) Yield

This research intend to investigate the effects of some synthesis parameters, namely, reaction temperature, catalyst loading on Vertical CVD growth of CNTs. Therefore more data investigations are required for Vertical CVD synthesis of CNTs. However, there is no clear relation between synthesis parameters and CNTs growth. In present study, CNTs were produced through decomposition of acetone over a prepared catalyst Iron and Molybdenum supported on Alumina (Fe-Mo/AL2O3). The effects of those parameters on Vertical CVD synthesis of CNTs were studied using analysis of variance (ANOVA). After each run the product, including deposited carbon and catalyst, was characterized using different analysis techniques. The morphology of as grown CNTs was observed by Scanning Electron Microscope (SEM). Thermo Gravimetric Analysis (TGA) was applied as this technique can reveal different forms of the carbon deposits (eg. amorphous and CNTs) according to their different thermal stabilities. It was proved that there is a significant interaction between parameters under observation. In other words, synthesis parameters are not independent variable. As a result of that the quality and yield of the CNTs were appropriate achieved at 750°C reaction temperature, 40 min deposition time and 5 gr catalysts loading.