Tetraalkylammonium acetates and tetraalkylammonium tetrafluoroborates as new templates for room-temperature synthesis of mesoporous silica spheres
PBN-AR
Instytucja
Wydział Technologii i Inżynierii Chemicznej (Zachodniopomorski Uniwersytet Technologiczny w Szczecinie)
Informacje podstawowe
Główny język publikacji
angielski
Czasopismo
JOURNAL OF POROUS MATERIALS (25pkt w roku publikacji)
ISSN
1380-2224
EISSN
1573-4854
Wydawca
SPRINGER
DOI
Rok publikacji
2018
Numer zeszytu
3
Strony od-do
935-943
Numer tomu
25
Identyfikator DOI
Liczba arkuszy
Słowa kluczowe
angielski
structure-directing agent
MCM-41 silica spheres
protein immobilization
Bacitracin
insulin
lipase
Streszczenia
Język
angielski
Treść
Six surface active compounds containing: hexadecyltrimethylammonium [HDTMA], dodecyltrimethylammonium [DDTMA] or didecyldimethylammonium [DDA] cation and tetrafluoroborate [BF4] or acetate [OAc] anion were synthesized, purified and characterized, and subsequently applied for the synthesis of mesoporous silica materials of MCM-41 type. The materials were characterized using X-ray diffraction, Scanning Electron microscopy, and nitrogen physisorption method. Their structures were compared with that of reference MCM-41 material obtained with the conventional template [HDTMA][Br]. Nanosized silica spheres with size distribution in the range of 200–800 nm are obtained with the novel templates. The pore size of the obtained materials was in the range of 2.1–3.1 nm, and it was dependent only on the cation structure of the templates. The MCM-41 materials obtained with the acetate-based templates were characterized with a higher specific surface area in comparison with the reference material. On the basis of SEM, XRD and nitrogen physisorption data could be concluded that all tetraalkylammonium acetates used as templates lead to mesoporous silica nanospheres with very good textural characteristics, while in case of tetraalkylammonium tetrafluoroborates the best results in terms of particle uniformity and surface properties are obtained with [DDTMA][BF4]. MCM-41-[HDTMA][OAc] exhibited excellent loading capacity (374.1 mg/g) for the cyclic peptide antibiotic bacitracin, and moderate to good loading capacity for larger peptide and proteins such as insulin (70.3 mg/g) and lipase from porcine pancreas (70.8 mg/g).
Inne
System-identifier
PANEL-1006003
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