Department of Mechanical Engineering and Berkeley Sensor and Actuator Center 497 Cory Hall, University of California at Berkeley, Berkeley, CA 94720, USA.
Nanotechnology. 2010 Dec 3;21(48):485601. doi: 10.1088/0957-4484/21/48/485601. Epub 2010 Nov 8.
Titanium dioxide (TiO(2)) is one of the most widely studied and important materials for catalysis, photovoltaics, and surface science applications, but the ability to consistently control the relative exposure of higher surface energy facets during synthesis remains challenging. Here, we present the repeatable synthesis of highly reactive, rutile {001} or {101} facets on broad, sword-shaped TiO(2) nanostructures rapidly synthesized in minutes. Growth occurs along planes of lower surface energy, repeatedly yielding nanostructures with large, high energy facets. The quantitative photocatalytic reactivity of the nanoswords, demonstrated by the photoreduction of silver, is over an order of magnitude higher than reference low energy TiO(2){110} substrates. Therefore, the higher surface energy dominated TiO(2) nanoswords are ideal structures for characterizing the physicochemical properties of rutile TiO(2), and may be used to enhance a variety of catalytic, optical, and clean-technology applications.
二氧化钛（TiO(2)）是催化、光电和表面科学应用中研究最多和最重要的材料之一，但在合成过程中始终如一地控制更高表面能晶面的相对暴露的能力仍然具有挑战性。在这里，我们提出了在几分钟内快速合成的宽剑形 TiO(2) 纳米结构上重复合成高反应性锐钛矿{001}或{101}晶面的方法。生长沿表面能较低的平面进行，反复得到具有大的高能晶面的纳米结构。纳米剑的定量光催化活性，通过银的光还原来证明，比参考低能 TiO(2){110}衬底高一个数量级以上。因此，高表面能主导的 TiO(2)纳米剑是锐钛矿 TiO(2)物理化学性质表征的理想结构，可用于增强各种催化、光学和清洁技术应用。
