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Hongmei Li, Prof. Yangsu Zeng, Prof. Tongcheng Huang, Prof. Lingyu Piao, Dr. Zijie Yan and Dr. Min Liu Hierarchical TiO2 Nanospheres with Dominant {001} Facets: Facile Synthesis, Growth Mechanism, and Photocatalytic Activity Chemistry - A European Journal 18

Article first published online: 12 APR 2012 | DOI: 10.1002/chem.201103087

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A one-pot hydrothermal method was used for facile synthesis of hierarchical TiO2 nanospheres with controlled surface morphologies and up to 78 % {001} facets (see figure). The influence of reaction temperature, reaction time, and HF concentration was systematically studied. A possible growth mechanism of the hierarchical TiO2 nanostructures with exposed {001} facets was proposed. Owing to their hierarchical architecture and high percentage of exposed {001} facets, the hierarchical TiO2 nanospheres exhibit much enhanced photocatalytic efficiency (almost fourfold) compared to P25 TiO2.

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