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Assembly of TiO2-on-Cu2O Nanocubes with Narrow-Band Cu2O-Induced Visible-Light-Enhanced Photocatalytic Activity

Authors

  • Jiali Liu,

    1. Department of Chemistry, Key Laboratory of Yangtze River Water Environment, Ministry of Education, Tongji University, 1239 Siping Road, Shanghai 200092 (China), Fax: (+86) 21-65981097
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    • These authors contributed equally to this work.

  • Prof. Ming Wen,

    1. Department of Chemistry, Key Laboratory of Yangtze River Water Environment, Ministry of Education, Tongji University, 1239 Siping Road, Shanghai 200092 (China), Fax: (+86) 21-65981097
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    • These authors contributed equally to this work.

  • Hanxing Chen,

    1. Department of Chemistry, Key Laboratory of Yangtze River Water Environment, Ministry of Education, Tongji University, 1239 Siping Road, Shanghai 200092 (China), Fax: (+86) 21-65981097
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  • Dr. Jing Li,

    1. Department of Chemistry, Key Laboratory of Yangtze River Water Environment, Ministry of Education, Tongji University, 1239 Siping Road, Shanghai 200092 (China), Fax: (+86) 21-65981097
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    • These authors contributed equally to this work.

  • Prof. Qing-Sheng Wu

    Corresponding author
    1. Department of Chemistry, Key Laboratory of Yangtze River Water Environment, Ministry of Education, Tongji University, 1239 Siping Road, Shanghai 200092 (China), Fax: (+86) 21-65981097
    • Department of Chemistry, Key Laboratory of Yangtze River Water Environment, Ministry of Education, Tongji University, 1239 Siping Road, Shanghai 200092 (China), Fax: (+86) 21-65981097

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Abstract

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 6–8 nm show a well-monodispersed distribution of the 200–300 nm-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 rhodamine B, which is induced by the bandgap-adjusting effect. This promising self-assembly route can be extended to the preparation of other nanocomposite materials.

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