Pregled bibliografske jedinice broj: 1203982
Thermal evolution of gels prepared by chelation of aluminum sec‑butoxide with ethyl acetoacetate in various amounts
Thermal evolution of gels prepared by chelation of aluminum sec‑butoxide with ethyl acetoacetate in various amounts // Journal of thermal analysis and calorimetry, 148 (2023), 4; 1231-1239 doi:10.1007/s10973-022-11448-8 (međunarodna recenzija, članak, znanstveni)
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Naslov
Thermal evolution of gels prepared by chelation of
aluminum sec‑butoxide with ethyl acetoacetate in
various amounts
Autori
Kurajica, Stanislav ; Mužina, Katarina ; Simčić, Ivan ; Mandić, Vilko
Izvornik
Journal of thermal analysis and calorimetry (1388-6150) 148
(2023), 4;
1231-1239
Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni
Ključne riječi
alumina ; sol–gel ; chelation ; thermal analysis
Sažetak
This work presents a thermal evolution study of gels obtained by chelation of aluminum sec- butoxide (Asb) with ethyl acetoacetate (Eaa) in various amounts. Samples were characterized by scanning electron microscopy (SEM), low angle laser light scattering (LALLS), differential thermal and thermo-gravimetric analysis (DTA/TGA), Fourier-transformed infra-red spectroscopy (FTIR) and X-ray diffraction (XRD). It was established that samples with a low Eaa/Asb ratio are mainly amorphous, whilst the samples with greater Eaa/Asb ratio are predominantly chelate. The crystallization of γ-Al2O3 takes place between 600 and 1000 °C in two separate processes for all investigated samples. On the other hand, a complete transition to α-Al2O3 at 1200 °C occurs exclusively in samples with high Eaa/Asb ratio, while it is only partial for samples with low Eaa/Asb ratio. The observed mass loss is in concordance with the hypothesis that the overall gel content in the samples could be represented by a simplified formula Al(Eaa)xO(3−x)/2, where x is the Eaa/Asb ratio. In addition to thermal evolution, the gel-chelate duality of the samples is reflected in the morphology and particle size distribution.
Izvorni jezik
Engleski
Znanstvena područja
Kemija, Kemijsko inženjerstvo, Temeljne tehničke znanosti
POVEZANOST RADA
Projekti:
HRZZ-IP-2018-01-2963 - Hidrotermalna sinteza dopiranog cerij oksidnog nanokatalizatora (HOuDiNI) (Kurajica, Stanislav, HRZZ - 2018-01) ( CroRIS)
HRZZ-UIP-2019-04-2367 - Fenomeni na površini tijekom priprave naprednih nanokompozita infiltracijom i funkcionalizacijom poroznih materijala (SLIPPERYSLOPE) (Mandić, Vilko, HRZZ - 2019-04) ( CroRIS)
MZO-RH-RSLO-N/A - NMR karakterizacija aluminijeva sec-butoksida modificiranog s etil acetoacetatom u različitim udjelima (Kurajica, Stanislav, MZO - Znanstveno-tehnološka suradnja sa Slovenijom 2014.-2015.) ( CroRIS)
--PZS-2019-02-1555 - Fotonaponska-geopolimerna fasada: uloga vode-kisika u naprednom sklapanju filmova kompozitnih materijala (PV-WALL) (Mandić, Vilko; Pavić, Luka) ( CroRIS)
Ustanove:
Fakultet kemijskog inženjerstva i tehnologije, Zagreb,
PLIVA HRVATSKA d.o.o.
Citiraj ovu publikaciju:
Časopis indeksira:
- Current Contents Connect (CCC)
- Web of Science Core Collection (WoSCC)
- Science Citation Index Expanded (SCI-EXP)
- SCI-EXP, SSCI i/ili A&HCI
- Scopus
Uključenost u ostale bibliografske baze podataka::
- CA Search (Chemical Abstracts)