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Mesopore Connectivity Improving Aerosol-Assisted Synthesis of Mesoporous Alumina Powders with High Surface Area.
- Source :
-
Langmuir : the ACS journal of surfaces and colloids [Langmuir] 2018 Nov 13; Vol. 34 (45), pp. 13781-13787. Date of Electronic Publication: 2018 Oct 26. - Publication Year :
- 2018
-
Abstract
- Considering the closed packing of supramolecular mediated cage-type (spherical) mesopores inside spherical particles that are typically obtained by the aerosol-assisted process, uniform mesopores cannot be packed so periodically and then the mesopores are less connected and/or occasionally isolated, leading to the formation of low-surface-area mesoporous particles. In this study, we proposed the controlled swelling of such cage-type mesopores for improving their connectivity. Actually, we succeeded in preparing high-surface-area mesoporous alumina powders using poly(oxyethylene)- block-poly(oxypropylene)- block-poly(oxyethylene) (EO <subscript>n</subscript> PO <subscript>m</subscript> EO <subscript>n</subscript> ) type triblock copolymers such as Pluronic P123. The surface area of the mesoporous alumina powders was originally low (278 m <superscript>2</superscript> g <superscript>-1</superscript> without organic additives), which can be drastically increased up to ca. 540 m <superscript>2</superscript> g <superscript>-1</superscript> through the controlled welling with suitable addition of 1,3,5-trimethylbenzene and 1,3,5-triisopropylbenzene. The insight is promising for further development of the aerosol-assisted approach for recovering high-quality mesoporous powders and helpful for rational catalyst design by utilizing mesoporous alumina powders with extremely high surface area.
Details
- Language :
- English
- ISSN :
- 1520-5827
- Volume :
- 34
- Issue :
- 45
- Database :
- MEDLINE
- Journal :
- Langmuir : the ACS journal of surfaces and colloids
- Publication Type :
- Academic Journal
- Accession number :
- 30336058
- Full Text :
- https://doi.org/10.1021/acs.langmuir.8b02880