Synthesis of oriented MFI zeolite films by template-free secondary growth

Xiu Feng Liu; Bao Quan Zhang; Yue Sheng Lin

Synthesis of oriented MFI zeolite films by template-free secondary growth

Xiu Feng Liu, Bao Quan Zhang, Yue Sheng Lin

Research output: Contribution to journal › Article › peer-review

Abstract

The seed layer oriented in b-&h0h-axes was covered on the porous α-Al₂O₃ substrate using a spin coater. In the absence of organic templates, the morphology and orientation of the zeolite film over the seed layer could be regulated by changing the ratios of OH ^-/Si and H₂O/Si, and the reaction temperature. As far as the synthesis system of 1SiO₂ =4EtOH:xNaOH:yH₂O is concerned, the SEM and XRD measurements revealed that the morphology and orientation of zeolite films were closely related to the values of both x and y. When x=0.56, the orientation of the zeolite film would be changed from random to b-axis by increasing y, which was accompanied by substantial morphology change. When y=270, the continuous and preferentially b-oriented MFI zeolite film of ca. 4 μm thick could be obtained.

Original language	English (US)
Pages (from-to)	1679-1683
Number of pages	5
Journal	Chinese Journal of Inorganic Chemistry
Volume	24
Issue number	10
State	Published - Oct 1 2008
Externally published	Yes

Keywords

Clear gel
Crystal orientation
Secondary growth
Template-free
Zeolite membrane

ASJC Scopus subject areas

Inorganic Chemistry

Cite this

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title = "Synthesis of oriented MFI zeolite films by template-free secondary growth",

abstract = "The seed layer oriented in b-&h0h-axes was covered on the porous α-Al2O3 substrate using a spin coater. In the absence of organic templates, the morphology and orientation of the zeolite film over the seed layer could be regulated by changing the ratios of OH -/Si and H2O/Si, and the reaction temperature. As far as the synthesis system of 1SiO2 =4EtOH:xNaOH:yH2O is concerned, the SEM and XRD measurements revealed that the morphology and orientation of zeolite films were closely related to the values of both x and y. When x=0.56, the orientation of the zeolite film would be changed from random to b-axis by increasing y, which was accompanied by substantial morphology change. When y=270, the continuous and preferentially b-oriented MFI zeolite film of ca. 4 μm thick could be obtained.",

keywords = "Clear gel, Crystal orientation, Secondary growth, Template-free, Zeolite membrane",

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T1 - Synthesis of oriented MFI zeolite films by template-free secondary growth

AU - Liu, Xiu Feng

AU - Zhang, Bao Quan

AU - Lin, Yue Sheng

PY - 2008/10/1

Y1 - 2008/10/1

N2 - The seed layer oriented in b-&h0h-axes was covered on the porous α-Al2O3 substrate using a spin coater. In the absence of organic templates, the morphology and orientation of the zeolite film over the seed layer could be regulated by changing the ratios of OH -/Si and H2O/Si, and the reaction temperature. As far as the synthesis system of 1SiO2 =4EtOH:xNaOH:yH2O is concerned, the SEM and XRD measurements revealed that the morphology and orientation of zeolite films were closely related to the values of both x and y. When x=0.56, the orientation of the zeolite film would be changed from random to b-axis by increasing y, which was accompanied by substantial morphology change. When y=270, the continuous and preferentially b-oriented MFI zeolite film of ca. 4 μm thick could be obtained.

AB - The seed layer oriented in b-&h0h-axes was covered on the porous α-Al2O3 substrate using a spin coater. In the absence of organic templates, the morphology and orientation of the zeolite film over the seed layer could be regulated by changing the ratios of OH -/Si and H2O/Si, and the reaction temperature. As far as the synthesis system of 1SiO2 =4EtOH:xNaOH:yH2O is concerned, the SEM and XRD measurements revealed that the morphology and orientation of zeolite films were closely related to the values of both x and y. When x=0.56, the orientation of the zeolite film would be changed from random to b-axis by increasing y, which was accompanied by substantial morphology change. When y=270, the continuous and preferentially b-oriented MFI zeolite film of ca. 4 μm thick could be obtained.

KW - Clear gel

KW - Crystal orientation

KW - Secondary growth

KW - Template-free

KW - Zeolite membrane

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Synthesis of oriented MFI zeolite films by template-free secondary growth

Abstract

Keywords

ASJC Scopus subject areas

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