Metal-Organic Framework as Catalyst Precursor of Floating Catalyst Chemical Vapor Deposition for Single-Walled Carbon Nanotube Manufacture

摘要

ZIF-67 is acheap and nontoxic catalyst precursor for SWCNTsmanufacture and multiple macrostructures by using the FCCVD method. @@@ The floating catalyst chemical vapor deposition (FCCVD)methodis one of the most important technologies for the mass manufactureof single-walled carbon nanotubes (SWCNTs). In this paper, we firstattempt to use metal-organic frameworks (MOF) as the catalystprecursor of FCCVD and successfully obtain high-quality SWCNTs withoutgaseous carbon sources. The preparation experiment was conducted byinjection of the ZIF-67 dispersion in ethanol solution into a tubularfurnace at 1100 & DEG;C under H-2 atmosphere. ZIF-67, ethanol,and H-2 acted as the catalyst precursor, carbon source,and carrier gas, respectively. The presence of H-2 aroundthe ZIF-67 prevents the Co nanocatalysts from quick aggregation, andethanol significantly accelerates ZIF-67 decomposition and SWCNTsformation during FCCVD. The as-prepared SWCNTs feature a narrow diameterdistribution and high purity and demonstrate promise for buildingmultiple macrostructures and the application of an antibacterial fieldas an efficient photocatalyst. Compared with the traditional catalystprecursor of ferrocene, ZIF-67 is cheap and nontoxic. Moreover, thegaseous carbon sources are replaced by ethanol, which greatly decreasesthe manufacture cost and harm to environments. Our investigation displayedthe great potential of MOF in FCCVD, offering an efficient and low-costmethod to manufacture SWCNTs.

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