Κατεύθυνση Ανόργανη Χημεία και Εφαρμογές της στη Βιομηχανία
Library of the School of Science

2024-06-20

2024

Zoi Artemisia

Πατρίνα Παρασκευοπούλου, Καθηγήτρια Τμήμα Χημείας ΕΚΠΑ (Επιβλέπουσα)
Παναγιώτης Κυρίτσης, Καθηγητής Τμήμα Χημείας ΕΚΠΑ,
Κωνσταντίνος Μεθενίτης, Αναπληρωτής Καθηγητής Τμήμα Χημείας ΕΚΠΑ

Σύνθεση και χαρακτηρισμός αεροπηκτωμάτων Μ-αλγινικών (Μ: Pd, Ca, Cu) δικτυωμένων με αλειφατική πολυουρία

Greek

Synthesis and characterization of aerogels of M-alginates (M: Pd, Ca, Cu) cross-linked with aliphatic polyurea

In the present thesis the preparation of polyurea-crosslinked palladium alginate (X-Pd-Alg-IP) aerogels is presented. The new aerogels are macroporous/mesoporous materials with BET surface areas in the range of 351-361 m2 g-1, while Pd can be in oxidation state II, IV or 0. X-Pd(0)-Alg-IP aerogels were prepared via hydrogenation of X-Pd(II)-Alg-IP with Η2 in water. Hydrogenation does not affect the surface area or the nanostructure of the material. All aerogels were characterized with ATR-FTIR, ICP-MS, nitrogen porosimetry and He pycnometry.
In addition, the effect of different drying methods (supercritical fluid (SCF) CO2 drying or drying from pentane) on the properties of X-Ca-Alg-IP and X-Cu-Alg-IP aerogels was studied. SCF drying provided macroporous/mesoporous aerogels with BET surface areas in the range of 346-370 m2 g-1 (X-Ca-Alg-IP-SCF) and 456-479 m2 g-1 (X-Cu-Alg-IP-SCF), while drying from pentane provided mesoporous aerogels with BET surface areas in the range of 289-332 m2 g-1 (X-Ca-Alg-IP-pent) and 354-375 m2 g-1 (X-Cu-Alg-IP-pent).

Science

aerogels, alginates, polyurea, polyurea crosslinked alginate aerogels (X-alginates), adsorption, palladium

Yes

3

Yes

87

91

File access is restricted until 2027-06-21.

https://pergamos.lib.uoa.gr/uoa/dl/object/3401517