科研之友
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摘要
Newly designed TiO2-on-Cu2O nanocubes have been constructed as visible-light-driven photocatalysts with high efficiency by means of a facile self-assembly approach at room temperature. In the resultant TiO2-on-Cu2O nanocubes, the TiO2 nanoparticles with a diameter of 6-8nm show a well-monodispersed distribution of the 200-300nm-sized Cu2O single-crystal nanocubes, which can form sub-monolayer, monolayer, and multilayer coverage through controlling the ratio of the two phases. In particular, the coupling of the wide-bandgap semiconductor TiO2 with narrow-bandgap Cu2O can lead to the markedly enhanced high visible-light photocatalytic activity in the TiO2-on-Cu2O nanocomposite systems toward the photodegradation of rhodamineB, which is induced by the bandgap-adjusting effect. This promising self-assembly route can be extended to the preparation of other nanocomposite materials.
- 出版日期2014-2
- 单位同济大学
