Monolithic Solid Based on Single-Walled Carbon Nanohorns: Preparation, Characterization, and Practical Evaluation as a Sorbent
View/ Open
Author
Fresco-Cala, B.
López-Lorente, A.I.
Cárdenas, Soledad
Publisher
MDPIDate
2018Subject
Carbon monolithCarbon nanoparticles
Volatile organic compounds
Headspace microextraction
Single-walled carbon nanohorns
Gas chromatography
METS:
Mostrar el registro METSPREMIS:
Mostrar el registro PREMISMetadata
Show full item recordAbstract
A monolithic solid based solely on single walled carbon nanohorns (SWNHs) was prepared
without the need of radical initiators or gelators. The procedure involves the preparation of a wet
jelly-like system of pristine SWNHs followed by slow drying (48 h) at 25 C. As a result, a robust
and stable porous network was formed due to the interaction between SWNHs not only via - and
van der Waals interactions, but also via the formation of carbon bonds similar to those observed
within dahlia aggregates. Pristine SWNHs and the SWNH monolith were characterized by several
techniques, including scanning electron microscopy (SEM), transmission electron microscopy (TEM),
confocal laser scanning microscopy, Raman spectroscopy, X-ray photoelectron spectroscopy (XPS),
and nitrogen intrusion porosimetry. Taking into account the efficiency of carbon nanoparticles in
sorption processes, the potential applicability of the SWNH-monolith in this research field was
explored using toluene; m-, p-, and o-xylene; ethylbenzene; and styrene, as target analytes. Detection
limits were 0.01 g L�����1 in all cases and the inter-day precision was in the interval 7.4–15.7%.
The sorbent performance of the nanostructured monolithic solid was evaluated by extracting the
selected compounds from different water samples with recovery values between 81.5% and 116.4%.