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Pregled bibliografske jedinice broj: 316373

Study of the microstructure of amorphous aluminosilicate gel before and after its hydrothermal treament


Kosanović, Cleo; Bosnar, Sanja; Subotić, Boris; Svetličić, Vesna; Mišić, Tea; Dražić, Goran; Havenscak, Karoly
Study of the microstructure of amorphous aluminosilicate gel before and after its hydrothermal treament // Microporous and Mesoporous Materials, 110 (2008), 2-3; 177-185 (međunarodna recenzija, članak, znanstveni)


Naslov
Study of the microstructure of amorphous aluminosilicate gel before and after its hydrothermal treament
(Study of the microstructure of amorphous aluminosilicate gel before and after its hydrothermal treatment)

Autori
Kosanović, Cleo ; Bosnar, Sanja ; Subotić, Boris ; Svetličić, Vesna ; Mišić, Tea ; Dražić, Goran ; Havenscak, Karoly

Izvornik
Microporous and Mesoporous Materials (1387-1811) 110 (2008), 2-3; 177-185

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
Aluminosilicate gel; Atomic force microscopy; Microstructure; Nucleation; Zeolite A

Sažetak
Solid phase (gel) separated from freshly prepared sodium aluminosilicate hydrogel as well as during its hydrothermal treatment at 353 K were analyzed by different methods such as powder X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), Differential thermal gravimetry (DTG), High-resolution transmission electron microscopy (HR-TEM) and Atomic force microscopy (AFM). Analysis of the obtained results have shown that the freshly prepared gel is mainly composed of disc-shaped primary particles, but also partially or even fully crystalline entities were observed by AFM analysis. AFM analysis of the solids separated from the hydrogel at various stages of its hydrothermal treatment (heating at 353 K) indicates that the particles of the partially and/or fully crystalline phase are nuclei for further crystallization of zeolite. Although it is assumed that the nuclei have structure of faujasite rather than zeolite A, further growth of zeolite A was readily explained by the fact that regardless the “ structure” of nuclei, the type of zeolite to be formed is determined by the concentrations of silicon and aluminum in the liquid phase of the crystallizing system.

Izvorni jezik
Engleski

Znanstvena područja
Kemija



POVEZANOST RADA


Projekt / tema
098-0982904-2953 - Studij utjecaja svojstava alumosilikatnih prekursora na njihove transformacije (Josip Bronić, )
098-0982934-2744 - Površinske sile na atomskoj skali u istraživanju mora i nanotehnologiji (Vesna Svetličić, )

Ustanove
Institut "Ruđer Bošković", Zagreb

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