Key Laboratory for Ultrafine Materials of Ministry of Education, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai 200237, China.
Inorg Chem. 2009 Oct 19;48(20):9732-6. doi: 10.1021/ic901235n.
Anatase TiO(2) nanoshuttles have been successfully prepared via a hydrothermal method under alkaline conditions by employing titanate nanowires as the self-sacrificing precursors. The experimental results showed that a radical structural rearrangement took place from titanate wires to anatase TiO(2) shuttles during the hydrothermal reaction on the basis of a dissolution-recrystallization process. The surface of titanate nanowires plays a key role in the transformation process by providing both the structural units (e.g., TiO(6) octahedra) to realize anatase transformation and locations for the deposition and rearrangement of the dissolved structural units, while the formation of shuttle morphology is attributed to the minimization of surface energy with thermodynamically stable (101) facets of anatase TiO(2). The shape and phase transformation process were foundto be dependent on the hydrothermal reaction time. Raman and photoluminescence spectra confirmed the crystalline nature of the TiO(2) nanoshuttles.
锐钛矿 TiO(2) 纳米梭通过在碱性条件下的水热法成功制备，以钛酸盐纳米线为自牺牲前体制备。实验结果表明，在水热反应过程中，基于溶解-再结晶过程，钛酸盐纳米线发生了自由基结构重排，形成锐钛矿 TiO(2) 纳米梭。钛酸盐纳米线的表面在转化过程中起着关键作用，它提供了结构单元（例如，TiO(6) 八面体）来实现锐钛矿转化，以及为溶解结构单元的沉积和重排提供位置，而纳米梭形态的形成则归因于锐钛矿 TiO(2) 的热力学稳定（101）面的表面能最小化。发现形状和相转变过程取决于水热反应时间。拉曼和光致发光光谱证实了 TiO(2) 纳米梭的结晶性质。
