洋葱状富勒烯的CCVD法制备及其形貌特征

Onion-like fullerenes (OFs) were prepared by catalytic chemical vapor deposition (CCVD), and their morphologies and microstructure were characterized by high resolution transmission electron microscope. Results show that OFs can be obtained under the conditions where Co+2 supported by the zeolite (NaY) was used as catalyst, and acetylene was used as carbonaceous gas with the reaction temperature controlled at 700℃. The carbon yield per weight of catalyst can reach 60% and the portion of OFs can reach above 20%. From their vapor-solid formation pattern it is speculated, that graphitization occurs in successive stages from the core to the surface.