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Bioinspired Au/TiO₂ photocatalyst derived from butterfly wing (Papilio Paris)

Author:
Chen, Jianjun, Su, Huilan, Song, Fang, Moon, Won-Jin, Kim, Yang-Soo, Zhang, Di
Source:
Journal of colloid and interface science 2012 v.370 no.1 pp. 117-123
ISSN:
0021-9797
Subject:
Papilio, butterflies, gold, methyl orange, nanocomposites, nanogold, photocatalysis, photocatalysts, powders, titanium, titanium dioxide, wings
Abstract:
The reticular hierarchical structure of butterfly wings (Papilio Paris) is introduced as template for Au/TiO₂ photocatalyst by depositing the Au nanoparticles on TiO₂ matrix, which is carried out by a water–ethanol sol–gel procedure combined with subsequent calcination. The obtained Au/TiO₂ nanocomposites present the reticular hierarchical structure of butterfly wings, and Au nanoparticles with an average size of 7nm are homogeneously dispersed in TiO₂ substrate. Benefiting from such unique reticular hierarchical structure and composition, the biomorphic Au/TiO₂ exhibits high-harvesting capability and presents superior photocatalytic activity. Especially, the biomorphic Au/TiO₂ at the nominal content of gold to titanium of 8wt% shows the highest photocatalytic activity and can completely decompose methyl orange within 80min, which is obviously higher than that of commercial Degussa P25 powders.
Agid:
1008063