Universities Center for Photocatalytic Treatment of Pollutants in Yunnan Province

Kunming, China

Universities Center for Photocatalytic Treatment of Pollutants in Yunnan Province

Kunming, China
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He J.,Universities Center for Photocatalytic Treatment of Pollutants in Yunnan Province | Chen D.,Universities Center for Photocatalytic Treatment of Pollutants in Yunnan Province | Li Y.,Universities Center for Photocatalytic Treatment of Pollutants in Yunnan Province | Shao J.,Universities Center for Photocatalytic Treatment of Pollutants in Yunnan Province | And 4 more authors.
Applied Physics A: Materials Science and Processing | Year: 2013

The siliceous frustules with sophisticated optical structure endow diatoms with superior solar light-harvesting abilities for effective photosynthesis. The preserved frustules of diatom (Cocconeis placentula) cells, as biophotonic crystals, were thus employed as both hard templates and silicon resources to synthesize TiO2 photocatalyst. Characterizations by a combination of physicochemical techniques proved that the bio-inspired sample is TiO 2-coated SiO2 with biogenic C self-doped in. It was found that the synthesized composites exhibited similar morphologies to the original diatom templates. In comparison with commercial Degussa P25 TiO2, the C-doped TiO2/SiO2 catalyst exhibited more light absorption in the visible region and higher photocatalytic efficiency for photodegradation of rhodamine B under visible light due to the biomorphic hierarchical structures, TiO2 coating and C-doping. © 2013 Springer-Verlag Berlin Heidelberg.

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