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首页> 外文期刊>RSC Advances >Uniform anatase single-crystal cubes with high thermal stability fully enclosed by active {010} and {001} facets
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Uniform anatase single-crystal cubes with high thermal stability fully enclosed by active {010} and {001} facets

机译：具有高热稳定性的均匀锐钛矿单晶立方体，被有效的{010}和{001}面完全封闭

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摘要

In order to improve the photocatalytic activity of TiO2, synthesis of well-faceted single crystals of anatase TiO2 with a high percentage of reactive facets exposed has attracted much attention due to its fascinating surface atomic configuration. In this study, large anatase single crystal cubes with {001} and {010} facets exposed were prepared for the first time via a facile microwave-assisted method. The preparation involved an aqueous solution of titanium tetrachloride, ionic liquid (1-methyl-imidazolium tetrafluoroborate), and sodium dodecyl benzene sulfonate (SDBS) as titanium precursor, facet-directing agent, and surfactant, respectively. It is demonstrated that these single-crystalline TiO2 crystals with cubic morphology showed better photocatalytic performance than decahedral anatase TiO2 due to the high density of unsaturated surface Ti-5c atoms on cubic TiO2.
机译：为了提高TiO 2的光催化活性，具有高比例暴露的反应面的锐钛矿型TiO 2单晶的合成由于其迷人的表面原子构型而备受关注。在这项研究中，通过便捷的微波辅助方法首次制备了具有{001}和{010}小面暴露的大型锐钛矿单晶立方体。制备过程分别涉及四氯化钛，离子液体（1-甲基咪唑四氟硼酸盐）和十二烷基苯磺酸钠（SDBS）作为钛前体，刻面定向剂和表面活性剂的水溶液。结果表明，这些立方晶型的单晶TiO2晶体比十面体锐钛矿型TiO2表现出更好的光催化性能，这是由于立方TiO2上的不饱和表面Ti-5c原子密度很高。

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