Alan G. MacDiarmid Institute, College of Chemistry, Jilin University, Changchun 130012, China.
Chemistry. 2009 Nov 16;15(45):12521-7. doi: 10.1002/chem.200901193.
Near-monodisperse Bi-doped anatase TiO(2) nanospheres with almost uniform diameters in the range of 117 to 87 nm were prepared simply by introducing different amounts of bismuth nitrate pentahydrate into the reaction system and subsequent calcinations. X-ray diffraction, UV-visible diffuse reflectance spectra, and X-ray photoelectron spectroscopy confirm that the doped ions substitute some of the lattice titanium atoms, and furthermore, Bi(3+) and Bi(4+) ions coexist. All the Bi-doped TiO(2) samples show much better photocatalytic activity than pure TiO(2) in the degradation of rhodamine B (RhB) under the irradiation of visible light (lambda>420 nm), and, interestingly, it was found that the degradation mechanism is different from the conventional one, which has already been reported elsewhere. The detailed mechanism is discussed in this article.
近单分散 Bi 掺杂锐钛矿 TiO(2) 纳米球，其直径在 117 至 87nm 范围内几乎均匀，通过在反应体系中引入不同量的五水合硝酸铋，并随后进行煅烧来简单制备。X 射线衍射、紫外-可见漫反射光谱和 X 射线光电子能谱证实，掺杂离子取代了部分晶格钛原子，而且，Bi(3+)和 Bi(4+) 离子共存。所有 Bi 掺杂的 TiO(2) 样品在可见光（lambda>420nm）照射下，在罗丹明 B（RhB）的降解中表现出比纯 TiO(2) 更好的光催化活性，有趣的是，发现降解机制不同于已经在其他地方报道的常规机制。本文讨论了详细的机制。
