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The effect of H2O/SiO2 ratio in precursor solution on the crystal size and morphology of zeolite ZSM-5. / Sashkina, Kseniya A.; Qi, Zhiye; Wu, Wei и др.
в: Microporous and Mesoporous Materials, Том 244, 15.05.2017, стр. 93-100.Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
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TY - JOUR
T1 - The effect of H2O/SiO2 ratio in precursor solution on the crystal size and morphology of zeolite ZSM-5
AU - Sashkina, Kseniya A.
AU - Qi, Zhiye
AU - Wu, Wei
AU - Ayupov, Artem B.
AU - Lysikov, Anton I.
AU - Parkhomchuk, Ekaterina V.
N1 - Publisher Copyright: © 2017 Elsevier Inc.
PY - 2017/5/15
Y1 - 2017/5/15
N2 - A series of zeolites ZSM-5 has been synthesized in hydrothermal conditions under various ratios of H2O/SiO2ranging from 10 to 300. Materials have been characterized by X-ray diffraction, scanning and transmission electron microscopy, nitrogen adsorption measurements, X-ray fluorescence spectrometry, inductively coupled plasma optical emission spectrometry and temperature-programmed desorption of ammonia. The effect of H2O/SiO2ratio in precursor solution on ZSM-5 product yield, crystallinity, crystal size, crystal size distribution, morphology, texture and acidity has been studied. The increase of H2O/SiO2ratio in precursor solution from 10 to 300 results in decreasing the average crystal size from 1250 to 180 nm, the higher H2O/SiO2ratio, the wider crystal size distribution. Aggregate-like mesoporous/hollow ellipsoid crystals and smooth pill-shaped crystals have been produced from precursor solutions with H2O/SiO2 = 25–100 and H2O/SiO2 = 10; 300, respectively. The average size of domains forming aggregate-like crystals is 40−50 nm. The specific acidity of ZSM-5 samples, synthesized from precursor solutions with different H2O/SiO2molar ratios and the same Si/Al, has a trend to decrease along with the average crystal size increase.
AB - A series of zeolites ZSM-5 has been synthesized in hydrothermal conditions under various ratios of H2O/SiO2ranging from 10 to 300. Materials have been characterized by X-ray diffraction, scanning and transmission electron microscopy, nitrogen adsorption measurements, X-ray fluorescence spectrometry, inductively coupled plasma optical emission spectrometry and temperature-programmed desorption of ammonia. The effect of H2O/SiO2ratio in precursor solution on ZSM-5 product yield, crystallinity, crystal size, crystal size distribution, morphology, texture and acidity has been studied. The increase of H2O/SiO2ratio in precursor solution from 10 to 300 results in decreasing the average crystal size from 1250 to 180 nm, the higher H2O/SiO2ratio, the wider crystal size distribution. Aggregate-like mesoporous/hollow ellipsoid crystals and smooth pill-shaped crystals have been produced from precursor solutions with H2O/SiO2 = 25–100 and H2O/SiO2 = 10; 300, respectively. The average size of domains forming aggregate-like crystals is 40−50 nm. The specific acidity of ZSM-5 samples, synthesized from precursor solutions with different H2O/SiO2molar ratios and the same Si/Al, has a trend to decrease along with the average crystal size increase.
KW - Aggregate-like hollow crystals
KW - Crystal size/morphology control
KW - ZSM-5
KW - CRYSTALLIZATION
KW - PARTICLES
KW - MECHANISM
KW - BEHAVIOR
KW - LIGHT-SCATTERING
KW - MOLECULAR-SIEVES
KW - INITIAL-STAGE
KW - TPA-SILICALITE-1
KW - GROWTH
KW - NUCLEATION
UR - http://www.scopus.com/inward/record.url?scp=85013803999&partnerID=8YFLogxK
U2 - 10.1016/j.micromeso.2017.02.060
DO - 10.1016/j.micromeso.2017.02.060
M3 - Article
AN - SCOPUS:85013803999
VL - 244
SP - 93
EP - 100
JO - Microporous and Mesoporous Materials
JF - Microporous and Mesoporous Materials
SN - 1387-1811
ER -
ID: 8716673