Carburization of Fe/Ni Catalyst for Efficient Growth of Single‐Walled Carbon Nanotubes

Scale‐up production of single‐walled carbon nanotubes (SWNTs) with high quality and purity is in pursuit, since the subsequent post purification treatment of residual metal or amorphous carbon is complicated and restricts further applications. Here, a compatible method to efficiently synthesize pure...

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Bibliographic Details
Published in:Small (Weinheim an der Bergstrasse, Germany) Germany), 2019-08, Vol.15 (35), p.e1902240-n/a
Main Authors: Lin, Dewu, Zhang, Shuchen, Liu, Weiming, Yu, Yue, Zhang, Jin
Format: Article
Language:English
Subjects:
Carbon
Carbon monoxide
carbon nanotubes
carburization
Carburization (corrosion)
Carburizing
Catalysis
Catalysts
Composite materials
efficiency
Iron
metal catalysts
Metal particles
migration
Nanotechnology
Nickel
Purity
Single wall carbon nanotubes
Vapor phases
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Summary:Scale‐up production of single‐walled carbon nanotubes (SWNTs) with high quality and purity is in pursuit, since the subsequent post purification treatment of residual metal or amorphous carbon is complicated and restricts further applications. Here, a compatible method to efficiently synthesize pure SWNTs on various supporters by using the precarburized Fe/Ni catalysts is reported. The preparation of catalysts is achieved by gas phase deposition together with CO gas at proper temperature, and the carburization of metal particles occurring simultaneously contributes to the size limitation of catalysts. By using micro‐quartz sand as a recyclable supporter, high‐quality SWNTs with a yield of 50 mg h−1 are prepared with 60% metal precursor utilization, 81% carbon source utilization, and only 0.12% (m/m) metal residues. Taking advantage of carburized Fe/Ni catalysts and appropriate supports makes it possible to balance the quantity, purity, and quality among SWNTs growth. Furthermore, this method provides a straightforward pathway to strongly combine SWNTs and diverse composite materials for further potential applications. Single‐walled carbon nanotubes (SWNTs) are efficiently synthesized on various supporters by carburized Fe/Ni catalysts. The precarburization treatment restrains the aggregation of metal catalysts to a great extent. By using micro‐quartz sand as supporters, high‐quality SWNTs are fabricated with 60% metal precursor utilization, 81% carbon source utilization, and only 0.12% (m/m) metal residues.
ISSN:1613-6810
1613-6829
DOI:10.1002/smll.201902240