Self-doped TiO2−x nanowires with enhanced photocatalytic activity: Facile synthesis and effects of the Ti3+
Self-doped TiO2−x nanowires with enhanced photocatalytic activity: Facile synthesis and effects of the Ti3+
复制标题
具有增强光催化活性的自掺杂 TiO2-x 纳米线：Ti3 的简易合成和效果
DOI：
10.1016/j.apsusc.2015.08.029
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发表时间：
2015
影响因子：
6.7
通讯作者：
Baibiao Huang
中科院分区：
文献类型：
--
作者：
Junpeng Wang;Ping Yang;Baibiao Huang
合成高稳定性的Ti3+自掺杂tio2对于了解Ti3+缺陷在光催化过程中的作用是非常必要的。在这项研究中，我们报告了一种简单的策略，以Ti2O3as前驱体制备稳定的Ti3+自掺杂tio2纳米线。拉曼光谱和XPS光谱证实了Ti3+和氧空位的存在。与纯TiO2相比，在紫外光照射下，Ti3+自掺杂TiO2的光催化活性增强，而在可见光照射下，纯TiO2和自掺杂TiO2样品都没有表现出光催化活性，尽管自掺杂TiO2在可见光区吸收增强。在实验结果的基础上，提出了Ti3+在光催化过程中的可能机理。
Synthesis of Ti3+self-doped TiO2with high stability is very necessary to understand the role of Ti3+defects in photocatalytic process. In this study, we report a simple strategy for preparing stable Ti3+self-doped TiO2nanowires with Ti2O3as precursors. Raman and XPS spectrum confirmed the existence of Ti3+and oxygen vacancies. Compared with the pure TiO2, the photocatalytic activity of the Ti3+self-doped TiO2enhanced under UV light irradiation, however, neither pure TiO2nor the self-dope TiO2samples exhibit photocatalytic activity while irradiated under visible light, though the self-doped TiO2have an enhanced absorption in visible region. On the basis of the experimental results, the possible mechanism of Ti3+in photocatalytic process is proposed.