THE SYNTHESIS OF CARBON NANOTUBES VIA THE CATALYTIC DECOMPOSTION OF HYDROCARBON GASES AND THE CARBON-ARC METHOD
Dr. Frans Prinsloo
Monday, October 18, 1999 3:30 pm
KCTCS Conference Center
Center for Applied Energy Research
The topic of my Ph.D thesis was the "pH dependence of a few biological important reaction systems". In this work I studied the mechanism of complex-formation between antitumor metal complexes and DNA components with the emphasis on the influence of pH on the reaction mechanism. After I have finished my Ph.D I did post-doctoral work in Germany on the kinetics and mechanism of complex-formation beween Fe(II/III) and complexes theroff and manganese(II/III) complexes and sulfite and nitrogen-sulfur compounds.
During this period I also studied the labilisation of the trans position in a square planar palladium compound by introducing a sulfur atom trans to a coordinating water/Cl- molecule. I also did a substantial amount of work on the substitution kinetics of the water molecule in vitamin B12. After this period I was employed by Sasol in the R& D division where I have joined the Coal and Derived Products Department.
Originally I was involved with the production of activated carbon and gasification kinetics. I also did some work on the beneficiation of coal. Last year we started a research program on the synthesis of carbon nanotubes via the carbon arc and catalytic decomposition of hydrocarbons methods. The work is still very premature and we have no specific applications for the carbon nanotubes in mind as yet.
During the talk I will show some pictures of the instrumentation that we are currently employing for the synthesis of carbon nanotubes. We are capable of synthesising approximately 200 - 500 g of carbon nanotubes per trial utilising the catalytic decomposition route.