Effects of Catalyst Pretreatment on Carbon Nanotube Synthesis from Methane Using Thin Stainless-Steel Foil as Catalyst by Chemical Vapor Deposition Method
| Autor: | Luong Huu Nguyen, Huan Manh Nguyen, Noa Uy Pham Do, Sura Nguyen, Cattien V. Nguyen, Danh Cong Nguyen, Ngan Thi Kim Nguyen, Thuan Minh Huynh |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
inorganic chemicals
Materials science General Chemical Engineering Chemical vapor deposition Carbon nanotube Methane Article Catalysis law.invention chemical vapor deposition Metal lcsh:Chemistry chemistry.chemical_compound law Carbon source General Materials Science FOIL method carbon nanotubes business.industry organic chemicals fungi technology industry and agriculture semiconductor pretreatment stainless-steel foil catalyst Semiconductor chemistry Chemical engineering lcsh:QD1-999 visual_art visual_art.visual_art_medium business |
| Zdroj: | Nanomaterials Volume 11 Issue 1 Nanomaterials, Vol 11, Iss 50, p 50 (2021) |
| ISSN: | 2079-4991 |
| DOI: | 10.3390/nano11010050 |
| Popis: | 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: | OpenAIRE |
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