Effect of synthesis method of nanocopper catalysts on the morphologies of carbon nanofibers prepared by catalytic decomposition of acetylene

Direct Growth of Carbon Nanotubes on Metal Supports by Chemical Vapor Deposition

“…Thus, it is very interesting to directly grow CNTs on Cu substrate. It is known that Cu can act as effective catalyst for CNT growth under certain conditions (Gan, et al 2001& Qin, et al 2004). However, the grown carbon nanostructures catalyzed by Cu are spaghetti-like and the catalytic activity of copper is accepted to be much lower than Fe, Co and Ni .…”

Carbon Nanotube and Nanofiber Growth on Zn-Based Catalysts

“…Zinc based catalyst precursors were prepared (tartrate, and oxalate) by starting from chloride forms by modifying the previously described methods (21). The pH of the solution was adjusted to 11 to 12 by addition The formation of NaCl in the structure motivated us to use of NaCl as the support of the catalytic material.…”

Growth of helical carbon nanofibers in the presence of Ni−Cu catalysts

“…The internal structures of CNFs are closely related to both the shape and material of the catalyst particles [3,4,6,7,8]. The simple structures of CNFs are understood from the shape of the catalyst particles: platelet CNFs grow from a well-faceted plane, while herringbone CNFs grow simultaneously from two or more intersecting faceted planes [9].…”

“…Recently, helical CNFs were synthesized intentionally using metallic catalysts, including Fe-based alloys [10], Zn [11], Cu [7,12,13], Pd [14], and Ni [15]. In the case of Cu catalysts, Ni-Cu alloy catalysts containing more than 25 at.% Cu or surface-enriched with Cu have been reported to produce octopus carbon with poor crystallinity [16][17][18].…”