Photocatalysis using various forms of titanium dioxide is well known, but many of these forms, such as TiO2 thin films or the commercially available Degussa P25 powder, have small particle sizes which makes recovery and handling a challenge. In this hot paper, Rosseinsky and co-workers utilise TiO2–SiO2 core-shell particles to produce an efficient photcatalyst which can be easily separated from aqueous solution. They use atomic layer deposition to deposit anatase TiO2 layers onto SiO2 support particles. The particles can photocatlyse methyl orange with nearly ten times greater efficiency compared to P25 when normalised for TiO2 content.
(J. Mater. Chem., 2012, 2, 20203–20209). Read for free until October 26th!
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