Double-Shelled TiO2 Hollow Spheres Assembled with TiO2 Nanosheets

作者：Zhang, Chao; Zhou, Yuming^*; Zhang, Yiwei^*; Zhao, Shuo; Fang, Jiasheng; Sheng, Xiaoli; Zhang, Tao; Zhang, Hongxing

来源：Chemistry - A European Journal, 2017, 23(18): 4336-4343.

DOI：10.1002/chem.201602654

• double-shelled hollow spheres
• hydrothermal treatment
• mesoporous SiO2
• nanosheets
• nanostructures
• TiO2

High-quality double-shelled TiO2 hollow spheres (DHS-Ti) assembled with TiO2 nanosheets have been synthesized for the first time through a simple hydrothermal treatment of sSiO(2)@TiO2 (TiO2-coated solid SiO2 spheres). The double-shelled structure shows a high BET surface area up to 417.6 m(2)g(-1). Anatase DHS-Ti of high crystallinity can be obtained without structural collapse by calcination treatment. The effects of cetyl trimethylammonium bromide (CTAB) concentration, pH, and hydrothermal reaction temperature have also been investigated with a series of contrast experiments. A formation mechanism involving the in situ growth of amorphous TiO2 nanosheets followed by the redeposition of dissolved silica species is proposed. Lastly, the DHS-Ti forming strategy can be extended as a general strategy to fabricate various morphological hollow nanostructures and double-shelled Pt nanocatalysts by rationally selecting functional sSiO(2) nanoparticles as core materials. This work could open up a new strategy for controllable synthesis of complex hollow structures and other functional materials.

• 出版日期2017-3-28
• 单位东南大学