Liu Jiali, Wen Ming, Chen Hanxing, Li Jing, Wu Qing-Sheng
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.
Chempluschem. 2014 Feb;79(2):298-303. doi: 10.1002/cplu.201300278. Epub 2014 Jan 2.
Newly designed TiO -on-Cu O 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 TiO -on-Cu O nanocubes, the TiO nanoparticles with a diameter of 6-8 nm show a well-monodispersed distribution of the 200-300 nm-sized Cu O 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 TiO with narrow-bandgap Cu O can lead to the markedly enhanced high visible-light photocatalytic activity in the TiO -on-Cu O 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.
通过在室温下采用简便的自组装方法，新设计的TiO₂负载于Cu₂O的纳米立方体已被构建为高效的可见光驱动光催化剂。在所得的TiO₂负载于Cu₂O的纳米立方体中，直径为6 - 8 nm的TiO₂纳米颗粒在尺寸为200 - 300 nm的Cu₂O单晶纳米立方体上呈现出良好的单分散分布，通过控制两相比例可形成亚单层、单层和多层覆盖。特别地，宽带隙半导体TiO₂与窄带隙Cu₂O的耦合可导致TiO₂负载于Cu₂O的纳米复合体系中对罗丹明B的光降解具有显著增强的高可见光光催化活性，这是由带隙调节效应引起的。这种有前景的自组装路线可扩展到其他纳米复合材料的制备。
