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The junction boosts the function: With a combination of surface-sensitive techniques, the photocatalytic activity of TiO2 was found to be directly related to the surface-phase structure, and can be greatly enhanced when anatase TiO2 nanoparticles are highly dispersed on the surface of rutile TiO2 to form anatase–rutile surface-phase junctions (see picture for calcination progression). Supporting information for this article is available on the WWW under http: //www. wiley-vch. de/contents/jc₂002/2008/z704788ₛ. pdf or from the author. Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article.
Zhang et al. (Tue,) studied this question.