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Catalytic Hollow-Fiber Membranes Prepared Using Layer-by-Layer Adsorption of Polyelectrolytes and Metal Nanoparticles

Ouyang, Lu and Dotzauer, David M. and Hogg, Seth R. and Macanas, Jorge and Lahitte, Jean-Francois and Bruening, Merlin L. Catalytic Hollow-Fiber Membranes Prepared Using Layer-by-Layer Adsorption of Polyelectrolytes and Metal Nanoparticles. (2010) Catalysis Today, vol. 156 (n° 3-4). pp. 100-106. ISSN 0920-5861

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Official URL: http://dx.doi.org/10.1016/j.cattod.2010.02.040

Abstract

Immobilization of metal nanoparticles in hollow fiber membranes via alternating adsorption of polyelectrolytes and negatively charged Au nanoparticles yields catalytic reactors with high surface areas. SEM images show that this technique deposits a high density of unaggregated metal nanoparticles both on the surfaces and in the pores of the hollow fibers. Catalytic reduction of 4-nitrophenol with NaBH4, which can be easily monitored by UV-Vis spectrophotometry, demonstrates that the nanoparticles in the hollow fiber membrane are highly catalytically active. In a single pass through the membrane, >99% of the 4-nitrophenol is reduced to 4-aminophenol, but this conversion decreases over time. The conversion decline may stem from catalyst fouling caused by byproducts of 4-aminophenol oxidation.

Item Type:Article
Additional Information:Thanks to Elsevier editor. The definitive version is available at http://www.sciencedirect.com The original PDF of the article can be found at Catalysis Today website : http://www.sciencedirect.com/science/journal/09205861
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT
Other partners > Michigan State University - MSU (USA)
Université de Toulouse > Université Paul Sabatier-Toulouse III - UPS
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Deposited By: Jean-Francois LAHITTE
Deposited On:09 Nov 2010 14:20

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