Selective Oxidation of ᴅ-Galactose over Gold Catalysts

  • ChemPubSoc Europe Logo
  • Author: ChemViews
  • Published Date: 26 September 2011
  • Source / Publisher: ChemCatChem/Wiley-VCH
  • Copyright: Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim
thumbnail image: Selective Oxidation of ᴅ-Galactose over Gold Catalysts

Related Societies

Woody biomass consists of lignocellulosic material, which is made up of three primary fractions: hemicellulose, cellulose, and lignin. Extraction of hemicelluloses, and the rare and specialty sugars they contain such as ᴅ-galactose, can be easily achieved in water at moderate temperatures. This makes them prime candidates for sustainable feedstocks for fine chemicals.


To demonstrate how these sugars could be used as feedstocks, Dmitry Yu Murzin and co-workers, Åbo Akademi University, Finland, have studied the oxidation of ᴅ-galactose to galactonolactone then to galactonic acid (see scheme). They used molecular oxygen and Au nanoparticles supported on Al2O3 to oxidize ᴅ-galactose and investigated the influence of nanoparticle size and the pH values of the reaction medium.

Oxidation of galactose by gold nanoparticles

Nanoparticles with a mean particle size of 2.6 nm exhibited the highest activity. Alkaline conditions gave high catalyst activity and selectivity to galactonic acid, while inhibition of the catalytic activity and poor selectivity were seen in the acidic medium.


Article Views: 2476

Sign in Area

Please sign in below

Additional Sign In options

Please note that to comment on an article you must be registered and logged in.
Registration is for free, you may already be registered to receive, e.g., the newsletter. When you register on this website, please ensure you view our terms and conditions. All comments are subject to moderation.

Article Comments - To add a comment please sign in

Bookmark and Share

If you would like to reuse any content, in print or online, from ChemistryViews.org, please contact us first for permission. more


CONNECT:

ChemistryViews.org on Facebook

ChemistryViews.org on Twitter ChemistryViews.org on YouTube ChemistryViews.org on LinkedIn Sign up for our free newsletter


A product of ChemPubSoc Europe (16 European Chemical Societies)and Wiley-VCH