The elemental analysis and multi-nuclear NMR study of an alkali molten salt used to digest reference and commercial SWCNT powders
KAUST DepartmentKing Abdullah University of Science and Technology (KAUST)
Imaging and Characterization Core Lab
Physical Science and Engineering (PSE) Division
Material Science and Engineering Program
Embargo End Date2021-10-09
Permanent link to this recordhttp://hdl.handle.net/10754/665529
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AbstractFor quite some time, alkaline oxidation (or fusion) has been used to solubilize refractory materials and mineral ores. Recently, its application scope was extended to facilitate batch-scale elemental analysis of nanomaterials such as carbon nanotubes. Here, a sodium tetraborate salt was used to digest four different types of single-walled carbon nanotubes. These samples were produced employing Co–Mo or Fe catalyst systems. Their graphitic matrix was exposed to different melt temperatures for a short period of time, following which the concentration of six transition metals was measured. Recoveries in excess of 80% were obtained, with the melt temperature affecting more the elemental extraction in Fe-catalyzed nanotubes. Together with previous results, the work described allows drawing pertinent conclusions on the advantages and limitations of alkaline oxidation as an alternative sample digestion approach for the routine chemical analysis of nanocarbons.
CitationSimoes, F. R. F., Abou-Hamad, E., Kamenik, J., Kučera, J., & Costa, P. M. F. J. (2020). The elemental analysis and multi-nuclear NMR study of an alkali molten salt used to digest reference and commercial SWCNT powders. Journal of Analytical Atomic Spectrometry. doi:10.1039/d0ja00325e
SponsorsKAUST is acknowledged for funding (URF/1/2980-01-01 and BAS/1/1346-01-01). We are grateful for the continuous assistance and availability of the facilities at the Core Labs, KAUST.
PublisherRoyal Society of Chemistry (RSC)