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Author

Kwon, Young-Nam
Superior Membrane-based Advanced Research & Technology (SMART) Lab
Research Interests
  • Membrane, Reverse(Forward) osmosis, Membrane distillation, Hydrate-induced ice desalination

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Preparation and Characterization of Titania-Deposited Silica Composite Hollow Fiber Membranes with High Hydrothermal Stability

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Title
Preparation and Characterization of Titania-Deposited Silica Composite Hollow Fiber Membranes with High Hydrothermal Stability
Author
Kwon, Young-NamKim, In-Chul
Keywords
Nickel Hollow Fiber Membrane; Nickel-Supported Silica Composite Membrane; Titania Deposition; Hydrothermal Stability
Issue Date
201311
Publisher
AMER SCIENTIFIC PUBLISHERS
Citation
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY, v.13, no.11, pp.7658 - 7663
Abstract
Hydrothermal stability of a porous nickel-supported silica membrane was successfully improved by deposition of titania multilayers on colloidal silica particles embedded in the porous nickel fiber support. Porous nickel-supported silica membranes were prepared by means of a dipping-freezing-fast drying (DFF) method. The titania layers were deposited on colloidal silica particles by repeating hydrolysis and condensation reactions of titanium isopropoxide on the silica particle surfaces. The deposition of thin titania layers on the nickel-supported silica membrane was verified by various analytical tools. The water flux and the solute rejection of the porous Ni fiber-supported silica membranes did not change after titania layer deposition, indicating that thickness of titania layers deposited on silica surface is enough thin not to affect the membrane performance. Moreover, improvement of the hydrothermal stability in the titania-deposited silica membranes was confirmed by stability tests, indicating that thin titania layers deposited on silica surface played an important role as a diffusion barrier against 90 °C water into silica particles.
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DOI
http://dx.doi.org/10.1166/jnn.2013.7835
ISSN
1533-4880
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