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Pregled bibliografske jedinice broj: 495778

Study of the mechanism of formation of nano-crystalline zeolite X in heterogeneous system


Kosanović, Cleo; Havenscak, Karoly; Subotić, Boris; Svetličić, Vesna; Mišić Radić, Tea; Cziraki, Agnes; Huhn, Gabriella; Buljan, Iva; Smrečki, Vilko
Study of the mechanism of formation of nano-crystalline zeolite X in heterogeneous system // Microporous and mesoporous materials, 142 (2011), 1; 139-146 doi:10.1016/j.micromeso.2010.11.027 (međunarodna recenzija, članak, znanstveni)


Naslov
Study of the mechanism of formation of nano-crystalline zeolite X in heterogeneous system

Autori
Kosanović, Cleo ; Havenscak, Karoly ; Subotić, Boris ; Svetličić, Vesna ; Mišić Radić, Tea ; Cziraki, Agnes ; Huhn, Gabriella ; Buljan, Iva ; Smrečki, Vilko

Izvornik
Microporous and mesoporous materials (1387-1811) 142 (2011), 1; 139-146

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

Ključne riječi
Aluminosilicate gel ; zeolite 13X ; atomic force microscopy ; microstructure ; nucleation

Sažetak
Aggregates of nano-sized zeolite 13X were synthesized at 373 K in order to study the mechanism of the nucleation and crystal growth processes of its formation. For this purpose solid phase (gel) separated from freshly prepared hydrogel having the batch molar composition: 10.94Na2O.Al2O3.5.03SiO2.417.90H2O as well as the solids drawn off the reaction mixture, during its hydrothermal treatment at 100 C and the crystallization end product (1.66 Na2O.Al2O3.2.5SiO2.6.6H2O) were analyzed by different methods such as powder X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), scanning-electron microscopy (SEM), electron diffraction (ED), atomic force microscopy (AFM), 29Si nuclear magnetic resonance spectroscopy (29Si-NMR) and thermal analysis methods (DTG, DSC). AFM analysis has shown that the freshly prepared gel is mainly composed of disc-shaped primary particles having height 0.6 nm and average diameter 2.4 nm. AFM analysis of the solids separated from the hydrogel at various stages of its hydrothermal treatment (heating at 100 C)indicates that the particles of the partially and/or fully crystalline phase detected in gel are nuclei for further crystallization of zeolite, consisting mainly of D6Rs. Such observation was also confirmed by the other used methods.

Izvorni jezik
Engleski

Znanstvena područja
Kemija



POVEZANOST RADA


Projekt / tema
098-0982904-2953 - Studij utjecaja svojstava alumosilikatnih prekursora na njihove transformacije (Josip Bronić, )
098-0982929-2917 - Spektroskopija NMR i modeliranje bioaktivnih molekula (Dejan Plavšić, )
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


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