Evaluation of first-row transition metal oxides supported on clay minerals for catalytic growth of carbon nanostructures
Φόρτωση...
Ημερομηνία
Συγγραφείς
Tsoufis, T.
Jankovic, L.
Gournis, D.
Trikalitis, P. N.
Bakas, T.
Τίτλος Εφημερίδας
Περιοδικό ISSN
Τίτλος τόμου
Εκδότης
Elsevier
Περίληψη
Τύπος
Είδος δημοσίευσης σε συνέδριο
Είδος περιοδικού
peer reviewed
Είδος εκπαιδευτικού υλικού
Όνομα συνεδρίου
Όνομα περιοδικού
Materials Science and Engineering B-Advanced Functional Solid-State Materials
Όνομα βιβλίου
Σειρά βιβλίου
Έκδοση βιβλίου
Συμπληρωματικός/δευτερεύων τίτλος
Περιγραφή
In the present work we employed various transition metals (Cr, Mn, Fe, Co, Ni, Cu and Zn) loaded on different smectite clays (laponite and montmorillonite) as catalysts in synthesis of carbon nanostructures (mainly nanotubes) and we report the effect of the nature of the catalytic centers and type of aluminosilicate layers in the morphology, quality and structure on the final products. Owing to their unique swelling, ion-exchange and intercalation properties smectite clays were easily. uniformly and reproducibly loaded with metal cations. Different homoionic forms of montmorillonite and laponite were prepared containing first-row transition metals and the synthesis of carbon nanostructures was carried out at 700 degrees C using an acetylene/nitrogen mixture. A variety of analytical techniques (XRD, Raman. SEM, TEM and thermal analysis) were used to fully characterize the final materials. Iron-, cobalt-, nickel- and manganese-exchanged clays showed to be effective catalysts for the production of carbon nanotubes, while acetylene decomposition over copper-exchanged clays resulted to the creation of carbon spheres. The resulting hybrid systems are particularly attractive for polymer reinforcing applications since the combined action of clay-carbon nanotubes in polymer matrixes can provide outstanding properties to the resulting composite materials. (C) 2008 Elsevier B.V. All rights reserved.
Περιγραφή
Λέξεις-κλειδιά
carbon nanotubes, clay minerals, catalytic chemical vapour deposition, carbon nanostructures, transition metals, chemical-vapor-deposition, large-scale synthesis, nanotube synthesis, structured carbon, decomposition, quality, cvd, nanocomposites, nanocrystals, oxidation
Θεματική κατηγορία
Παραπομπή
Σύνδεσμος
<Go to ISI>://000261480600010
Γλώσσα
en
Εκδίδον τμήμα/τομέας
Όνομα επιβλέποντος
Εξεταστική επιτροπή
Γενική Περιγραφή / Σχόλια
Ίδρυμα και Σχολή/Τμήμα του υποβάλλοντος
Πανεπιστήμιο Ιωαννίνων. Σχολή Θετικών Επιστημών. Τμήμα Μηχανικών Επιστήμης Υλικών