Effects of Catalyst Pretreatment on Carbon Nanotube Synthesis from Methane Using Thin Stainless-Steel Foil as Catalyst by Chemical Vapor Deposition Method
Thuan Minh Huynh,
Sura Nguyen,
Ngan Thi Kim Nguyen,
Huan Manh Nguyen,
Noa Uy Pham Do,
Danh Cong Nguyen,
Luong Huu Nguyen,
Cattien V. Nguyen
Affiliations
Thuan Minh Huynh
Petrovietnam R&D Center for Petroleum Processing, Vietnam Petroleum Institute, Lot E2b-5, D1 Street, Saigon Hi-Tech Park, District 9, Hochiminh City 708400, Vietnam
Sura Nguyen
Petrovietnam R&D Center for Petroleum Processing, Vietnam Petroleum Institute, Lot E2b-5, D1 Street, Saigon Hi-Tech Park, District 9, Hochiminh City 708400, Vietnam
Ngan Thi Kim Nguyen
Petrovietnam R&D Center for Petroleum Processing, Vietnam Petroleum Institute, Lot E2b-5, D1 Street, Saigon Hi-Tech Park, District 9, Hochiminh City 708400, Vietnam
Huan Manh Nguyen
Petrovietnam R&D Center for Petroleum Processing, Vietnam Petroleum Institute, Lot E2b-5, D1 Street, Saigon Hi-Tech Park, District 9, Hochiminh City 708400, Vietnam
Noa Uy Pham Do
Petrovietnam R&D Center for Petroleum Processing, Vietnam Petroleum Institute, Lot E2b-5, D1 Street, Saigon Hi-Tech Park, District 9, Hochiminh City 708400, Vietnam
Danh Cong Nguyen
Saigon Hi-Tech Park Research Laboratories, Lot I3, N2 Street, Saigon Hi Tech Park, District 9, Hochiminh City 708400, Vietnam
Luong Huu Nguyen
Petrovietnam R&D Center for Petroleum Processing, Vietnam Petroleum Institute, Lot E2b-5, D1 Street, Saigon Hi-Tech Park, District 9, Hochiminh City 708400, Vietnam
Cattien V. Nguyen
NTherma Corporation, 458 S Hillview Dr, Milpitas, CA 95035, USA
Synthesis of carbon nanotubes (CNTs) was carried out using methane as a carbon source via the chemical vapor deposition (CVD) method. A thin stainless-steel foil was used as catalyst for CNT growth. Our results revealed that pretreatment step of the stainless-steel foil as a catalyst plays an important role in CNT formation. In our experiments, a catalyst pretreatment temperature of 850 °C or 950 °C was found to facilitate the creation of Fe- and Cr-rich particles are active sites on the foil surface, leading to CNT formation. It is noted that the size of metallic particles after pretreatment is closely related to the diameter of the synthesized CNTs. It is interesting that a shorter catalyst pretreatment brings the growth of semiconducting typed CNTs while a longer pretreatment creates metallic CNTs. This finding might lead to a process for improving the quality of CNTs grown on steel foil as catalyst.
