Papers by Author: Ke Ao Hu

Abstract: Porous carbon monolith was used as substrate for microwave plasma chemical vapor deposition. The depositing time was set as 1 hour, 3hours, and 5 hours respectively. The deposited samples were characterized with Raman spectroscope and scanning electron microscope. It was proved that diamond was formed on the surface of all the samples. However, the surface morphology and phase composition of the chemical vapor deposition layer changed with depositing time. It was deduced that the porous carbon monolith was a carbon resource, and it gave out small molecules containing carbon element during the deposition. This changed the ratio of carbon to hydrogen in the growing atmosphere, and correspondingly influenced the growth of carbon on the substrate. With a low ratio of carbon to hydrogen, mainly diamond grew. Or else, other types of carbon would grow on the surface of the porous carbon monolith substrate.

Abstract: In this paper, porous carbon was made from biomass derived carbonaceous mesophase and carbonaceous fillers, and further applied as the substrate for CVD grow of nano carbon materials. With the assistance of microwave plasma, the acetone gas was decomposed into carbon and grew on the surface of the porous carbon, which produce ballas diamonds, carbon tubes, nets, petal, and other structures.