TY - JOUR
T1 - Microstructural evolution of condensed aggregates during the crystallization of ZSM-5 from a heterogeneous system
AU - Cardenas, Edgar
AU - Aguilar-Mamani, Wilson
AU - Tai, Cheuk Wai
AU - Cabrera, Saul
AU - Hedlund, Jonas
AU - Mouzon, Johanne
N1 - Publisher Copyright:
© 2021 Elsevier B.V.
PY - 2021/8/15
Y1 - 2021/8/15
N2 - The microstructural evolution of precursors of ZSM-5 zeolite crystallized from a heterogeneous system using fumed silica, sodium aluminate and tetrapropylammonium ions as reagents is investigated. Entities previously described by Ren et al. (Chem. Mater. 2012, 24, 10, 1726-1737) as condensed aggregates, were extensively studied using scanning electron microscopy, and energy dispersive spectroscopy. It was observed that the condensed aggregates first comprise a core of nanocrystals that is enveloped by a shell of amorphous gel phase. During crystallization, the amorphous shell surrounding the core is converted into ZSM-5 crystals that grow to a film surrounding the core. The crystals in the film grow competitively with nutrients provided by the liquid phase from the surroundings, while the nanocrystals in the core show little or no signs of growth.
AB - The microstructural evolution of precursors of ZSM-5 zeolite crystallized from a heterogeneous system using fumed silica, sodium aluminate and tetrapropylammonium ions as reagents is investigated. Entities previously described by Ren et al. (Chem. Mater. 2012, 24, 10, 1726-1737) as condensed aggregates, were extensively studied using scanning electron microscopy, and energy dispersive spectroscopy. It was observed that the condensed aggregates first comprise a core of nanocrystals that is enveloped by a shell of amorphous gel phase. During crystallization, the amorphous shell surrounding the core is converted into ZSM-5 crystals that grow to a film surrounding the core. The crystals in the film grow competitively with nutrients provided by the liquid phase from the surroundings, while the nanocrystals in the core show little or no signs of growth.
KW - A1. Characterization
KW - A1. Crystal morphology
KW - A2. Hydrothermal crystal growth
KW - B1. Zeolite
UR - http://www.scopus.com/inward/record.url?scp=85107136834&partnerID=8YFLogxK
U2 - 10.1016/j.jcrysgro.2021.126188
DO - 10.1016/j.jcrysgro.2021.126188
M3 - Artículo
AN - SCOPUS:85107136834
SN - 0022-0248
VL - 568-569
JO - Journal of Crystal Growth
JF - Journal of Crystal Growth
M1 - 126188
ER -