Effects of Catalyst Pretreatment on Carbon Nanotube Synthesis from Methane Using Thin Stainless-Steel Foil as Catalyst by Chemical Vapor Deposition Method.

Autor:	Huynh TM; 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., Nguyen S; 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., Nguyen NTK; 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., Nguyen HM; 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., Do NUP; 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., Nguyen DC; Saigon Hi-Tech Park Research Laboratories, Lot I3, N2 Street, Saigon Hi Tech Park, District 9, Hochiminh City 708400, Vietnam., Nguyen LH; 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., Nguyen CV; NTherma Corporation, 458 S Hillview Dr, Milpitas, CA 95035, USA.
Jazyk:	angličtina
Zdroj:	Nanomaterials (Basel, Switzerland) [Nanomaterials (Basel)] 2020 Dec 28; Vol. 11 (1). Date of Electronic Publication: 2020 Dec 28.
DOI:	10.3390/nano11010050
Abstrakt:	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.
Databáze:	MEDLINE
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