暴露高能晶面锐钛矿型TiO_2研究进展

Research progress in high energy facets dominated anatase TiO_2

在总结TiO2晶体的形貌结构理论预测研究的基础上,全面且深入地评述了不同形貌的暴露高能晶面锐钛矿相TiO2材料的合成方法及其调控机制。在合成出微米级单晶的基础上,暴露高能晶面的锐钛矿型TiO2纳米晶以及由基本纳米结构单元构成的三维纳米结构聚集体被陆续被制备出来。此外,本文还介绍了暴露高能晶面锐钛矿型TiO2材料的掺杂改性研究,阐述了新合成出的暴露高能晶面锐钛矿型TiO2材料在光催化降解污染物和分解水、太阳电池以及锂离子电池等领域的应用性能。最后,指出了暴露高能晶面TiO2在制备和应用研究上存在的不足和今后的发展方向。

Theoretical predictions on morphologies of TiO2 crystals are summarized, and the synthesis processes and related control mechanisms of the high energy facets dominated anatase TiO2 crystals with different morphologies are systematically reviewed. Besides the anatase TiO2 crystals with micro-scale sizes, the high energy facets dominated anatase TiO2 nanocrystals and the nanostructures composed of nanoscale units are synthesized by controlling the preparing processes as well as adjusting Ti resources and structure-directing agents. Researches on doping high energy facets dominated anatase TiO2 with different elements to improve their optical absorption properties and photocatalysis activities are also described in this paper. Moreover, the performances of the high energy facets dominated anatase TiO2 materials in the application fields, including photocatalytic degradation of pollutants, and water splitting to produce hydroten, solar cells, and Li-ion batteries, are introduced. It is shown that the high energy facets dominated anatase TiO2 materials exhibit superior activities compared with traditional TiO2 materials. The problems related to the research on the synthesis and applications of high energy facets dominated anatase TiO2 and the future development are presented.