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Surface modification of titania aerogel films by oxygen plasma treatment for enhanced dye adsorption

Alwin, S and Shajan, Sahaya X and Menon, Ranjini and Nabhiraj, PY and Warrier, KGK and Rao, Mohan G (2015) Surface modification of titania aerogel films by oxygen plasma treatment for enhanced dye adsorption. In: THIN SOLID FILMS, 595 (A). pp. 164-170.

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Official URL: http://dx.doi.org/10.1016/j.tsf.2015.10.071


Titania aerogels were synthesized by sol-gel route followed by ambient pressure subcritical drying technique. The aerogels synthesized in the present work possess a maximum surface area of 252 m(2)/g. The pore size distribution is between 2 and 30 nm which confirms their mesoporosity. The oxygen plasma treatment on titania aerogel thin films improved the surface area up to 273 m(2)/g and produced additional hydrophilic groups on the surface. It is confirmed by BET surface area, XPS and thermal analysis in conjunction with dye adsorption studies. After plasma treatment the dye adsorption capacity was increased 2.5 times higher than that of untreated aerogel film. The increased surface area and the hydrophilic groups generated on the titania aerogel surface during plasma treatment are responsible for enhanced dye adsorption. The overall nanoporous morphology of titania aerogel is preserved after plasma treatment. (C) 2015 Elsevier B.V. All rights reserved.

Item Type: Journal Article
Additional Information: Copy right for this article belongs to the ELSEVIER SCIENCE SA, PO BOX 564, 1001 LAUSANNE, SWITZERLAND
Keywords: Mesoporous materials; Hydrophilic; Solvent exchange; Sol-gel; Anatase; Bandgap
Department/Centre: Division of Physical & Mathematical Sciences > Instrumentation Appiled Physics
Date Deposited: 06 Jan 2016 05:39
Last Modified: 06 Jan 2016 05:39
URI: http://eprints.iisc.ac.in/id/eprint/53006

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