Light-induced sulfur transport inside single-walled carbon nanotubes

Sedelnikova, O.V. ; Gurova, O.A. ; Makarova, A.A. ; Fedorenko, A.D. ; Nikolenko, A.D. ; Plyusnin, P.E. ; Arenal, R. (Universidad de Zaragoza) ; Bulusheva, L.G. ; Okotrub, A.V.

Resumen: Filling of single-walled carbon nanotubes (SWCNTs) and extraction of the encapsulated species from their cavities are perspective treatments for tuning the functional properties of SWCNT-based materials. Here, we have investigated sulfur-modified SWCNTs synthesized by the ampoule method. The morphology and chemical states of carbon and sulfur were analyzed by transmission electron microscopy, Raman scattering, thermogravimetric analysis, X-ray photoelectron and near-edge X-ray absorption fine structure spectroscopies. Successful encapsulation of sulfur inside SWCNTs cavities was demonstrated. The peculiarities of interactions of SWCNTs with encapsulated and external sulfur species were analyzed in details. In particular, the donor-acceptor interaction between encapsulated sulfur and host SWCNT is experimentally demonstrated. The sulfur-filled SWCNTs were continuously irradiated in situ with polychromatic photon beam of high intensity. Comparison of X-ray spectra of the samples before and after the treatment revealed sulfur transport from the interior to the surface of SWCNTs bundles, in particular extraction of sulfur from the SWCNT cavity. These results show that the moderate heating of filled nanotubes could be used to de-encapsulate the guest species tuning the local composition, and hence, the functional properties of SWCNT-based materials.

Idioma: Inglés

DOI: 10.3390/nano10050818

Año: 2020

Publicado en: Nanomaterials 10, 5 (2020), 818 [12 pp.]
ISSN: 2079-4991

Factor impacto JCR: 5.076 (2020)

Categ. JCR: PHYSICS, APPLIED rank: 35 / 160 = 0.219 (2020) - Q1 - T1
Categ. JCR: NANOSCIENCE & NANOTECHNOLOGY rank: 51 / 106 = 0.481 (2020) - Q2 - T2
Categ. JCR: CHEMISTRY, MULTIDISCIPLINARY rank: 55 / 178 = 0.309 (2020) - Q2 - T1
Categ. JCR: MATERIALS SCIENCE, MULTIDISCIPLINARY rank: 103 / 333 = 0.309 (2020) - Q2 - T1

Factor impacto SCIMAGO: 0.919 - Materials Science (miscellaneous) (Q1) - Chemical Engineering (miscellaneous) (Q1)

Tipo y forma: Artículo (Versión definitiva)

Área (Departamento): Área Física Materia Condensada (Dpto. Física Materia Condensa.)