Microstructural investigations of tubular α-Al2O3-supported γ-Al2O3 membranes and their hydrothermal improvement

Md Hasan Zahir; Takayuki Nagano; Mohammad Mizanur Rahman; Khalid Alhooshani; Shakhawat Chowdhury; Md Abdul Aziz

doi:10.1016/j.jeurceramsoc.2017.02.036

Microstructural investigations of tubular α-Al₂O₃-supported γ-Al₂O₃ membranes and their hydrothermal improvement

Md Hasan Zahir^*, Takayuki Nagano, Mohammad Mizanur Rahman, Khalid Alhooshani, Shakhawat Chowdhury, Md Abdul Aziz

^*Corresponding author for this work

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

27 Scopus citations

Abstract

γ-Al₂O₃ meso-porous membranes supported by tubular α-Al₂O₃ substrates were prepared by using the sol-gel method and their nanostructural characterizations were performed for the first time with high-resolution transmission electron microscopy (HRTEM) before and after hydrothermal treatment at 500 °C. The HRTEM images and pore size distribution (PSD) analyses revealed that the morphologies as well as the characteristics of the powder and membrane samples prepared from the same boehmite are not identical. γ-Al₂O₃ and La₂O₃-Ga₂O₃ doped-γ-Al₂O₃ (LGA) membranes supported by α-Al₂O₃ were also fabricated and characterized under thermal and hydrothermal conditions for the purpose of comparisons. Finally, two type α-Al₂O₃/γ-Al₂O₃/SiO₂ (AA-SiO₂) and α-Al₂O₃/La₂O₃-Ga₂O₃-γ-Al₂O₃/SiO₂ (ALGA-SiO₂) membranes have been synthesized and the gas permeance of the membrane were measured in the temperature range 100–500 °C.

Original language	English
Pages (from-to)	2637-2647
Number of pages	11
Journal	Journal of the European Ceramic Society
Volume	37
Issue number	7
DOIs	https://doi.org/10.1016/j.jeurceramsoc.2017.02.036
State	Published - 1 Jul 2017

Bibliographical note

Publisher Copyright:
© 2017 Elsevier Ltd

Keywords

Alumina
High temperature
Hydrothermal treatment
Micro- and macrostructures
Supported membrane

ASJC Scopus subject areas

Ceramics and Composites
Materials Chemistry

Access to Document

10.1016/j.jeurceramsoc.2017.02.036

Cite this

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title = "Microstructural investigations of tubular α-Al2O3-supported γ-Al2O3 membranes and their hydrothermal improvement",

abstract = "γ-Al2O3 meso-porous membranes supported by tubular α-Al2O3 substrates were prepared by using the sol-gel method and their nanostructural characterizations were performed for the first time with high-resolution transmission electron microscopy (HRTEM) before and after hydrothermal treatment at 500 °C. The HRTEM images and pore size distribution (PSD) analyses revealed that the morphologies as well as the characteristics of the powder and membrane samples prepared from the same boehmite are not identical. γ-Al2O3 and La2O3-Ga2O3 doped-γ-Al2O3 (LGA) membranes supported by α-Al2O3 were also fabricated and characterized under thermal and hydrothermal conditions for the purpose of comparisons. Finally, two type α-Al2O3/γ-Al2O3/SiO2 (AA-SiO2) and α-Al2O3/La2O3-Ga2O3-γ-Al2O3/SiO2 (ALGA-SiO2) membranes have been synthesized and the gas permeance of the membrane were measured in the temperature range 100–500 °C.",

keywords = "Alumina, High temperature, Hydrothermal treatment, Micro- and macrostructures, Supported membrane",

author = "Zahir, {Md Hasan} and Takayuki Nagano and Rahman, {Mohammad Mizanur} and Khalid Alhooshani and Shakhawat Chowdhury and Aziz, {Md Abdul}",

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AU - Zahir, Md Hasan

AU - Nagano, Takayuki

AU - Rahman, Mohammad Mizanur

AU - Alhooshani, Khalid

AU - Chowdhury, Shakhawat

AU - Aziz, Md Abdul

PY - 2017/7/1

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AB - γ-Al2O3 meso-porous membranes supported by tubular α-Al2O3 substrates were prepared by using the sol-gel method and their nanostructural characterizations were performed for the first time with high-resolution transmission electron microscopy (HRTEM) before and after hydrothermal treatment at 500 °C. The HRTEM images and pore size distribution (PSD) analyses revealed that the morphologies as well as the characteristics of the powder and membrane samples prepared from the same boehmite are not identical. γ-Al2O3 and La2O3-Ga2O3 doped-γ-Al2O3 (LGA) membranes supported by α-Al2O3 were also fabricated and characterized under thermal and hydrothermal conditions for the purpose of comparisons. Finally, two type α-Al2O3/γ-Al2O3/SiO2 (AA-SiO2) and α-Al2O3/La2O3-Ga2O3-γ-Al2O3/SiO2 (ALGA-SiO2) membranes have been synthesized and the gas permeance of the membrane were measured in the temperature range 100–500 °C.

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