Ordered mesoporous CoO(x)/MCM-41 materials exhibiting long-range self-organized nanostructured morphology
Φόρτωση...
Ημερομηνία
Συγγραφείς
Katsoufidis, A. P.
Petrakis, D. E.
Armatas, G. S.
Trikalitis, P. N.
Pomonis, P. J.
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
Microporous and Mesoporous Materials
Όνομα βιβλίου
Σειρά βιβλίου
Έκδοση βιβλίου
Συμπληρωματικός/δευτερεύων τίτλος
Περιγραφή
A novel class of nanostructured silicious materials of MCM-41 type containing cobalt, CoO(x)/MCM-41. and exhibiting remarkable long-range self-organized morphology has been developed. The method of synthesis is a one step procedure and includes the use of poly-acrylic acid, complexed with CTAB by a zip-type mechanism, as a backbone of the structure. On the external surface of this mesostructure, hydrolysis of TEOS and Co(NO(3))(2) takes place at various pH values. The loading of cobalt (9 < Si/Co < 37) in the final solid can be controlled by the pH values at which the material is isolated in the range 5.5 < pH < 9.5. The isolated mesostructures, after drying (80 degrees C), as well as the resulting mesoporous solids after calcination (600 degrees C), exhibit remarkable self-organized morphology of the order of pm. In XRD, both the dried mesostructured as well as the calcined solids, exhibit typical patterns of MCM-41 type, which are blurred as the amount of cobalt increases. The surface area of those nanostructured mesoporous solids CoO(x)/MCM-41 was determined in the range 910-1250 m(2)/g by nitrogen porosimetry and their pore volume in the range 0.7-0.9 cm(3)/g. The pore diameter D was found to be around 3.1 nm while the pore anisotropy b = L/D, where L-the length of the pores, was determined in the range 15-380 depending on the sample. (c) 2006 Elsevier Inc. All rights reserved.
Περιγραφή
Λέξεις-κλειδιά
mcm-41, cobalt oxide, self-assembly, pore anisotropy, morphosynthesis, molecular-sieve mcm-41, hydrophilic block-copolymers, calcium-carbonate, reverse micelles, silica mcm-41, baso4 fibers, solids, facile, co, superstructures
Θεματική κατηγορία
Παραπομπή
Σύνδεσμος
<Go to ISI>://000238473200010
http://ac.els-cdn.com/S1387181106000096/1-s2.0-S1387181106000096-main.pdf?_tid=edafab1abc1d19d0147435e02f79d47d&acdnat=1333035532_febe52b15b3c1d17aee306b41393f6ac
http://ac.els-cdn.com/S1387181106000096/1-s2.0-S1387181106000096-main.pdf?_tid=edafab1abc1d19d0147435e02f79d47d&acdnat=1333035532_febe52b15b3c1d17aee306b41393f6ac
Γλώσσα
en
Εκδίδον τμήμα/τομέας
Όνομα επιβλέποντος
Εξεταστική επιτροπή
Γενική Περιγραφή / Σχόλια
Ίδρυμα και Σχολή/Τμήμα του υποβάλλοντος
Πανεπιστήμιο Ιωαννίνων. Σχολή Θετικών Επιστημών. Τμήμα Χημείας