Nitrogen-doped titanium dioxide photocatalysts for visible response prepared by using organic compounds
Nitrogen-doped titanium dioxide photocatalysts for visible response prepared by using organic compounds
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DOI：
10.1016/j.stam.2004.11.006
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发表时间：
2005-03-01
影响因子：
5.5
通讯作者：
Nosaka, AY
中科院分区：
文献类型：
--
作者：
Nosaka, Y;Matsushita, M;Nosaka, AY
为了在光催化反应中利用可见光，利用尿素和胍等有机化合物在市售光催化TiO2粉末中掺杂氮原子。x射线光电子能谱（XPS）分析表明，N原子被掺入到TiO2体相的两个不同位置。在可见光区观察到吸收边缘向较低能量和较高吸收的显著移动。这些n掺杂TiO2粉末在可见光照射下对水溶液中2-丙醇的分解表现出光催化活性。光催化活性随O位掺杂N原子的减少而增加，随其他位掺杂N原子的减少而降低。在水悬浮液体系中观察到基于氮原子释放的光催化活性降解。(c) 2005 Elsevier Ltd版权所有。
In order to utilize visible light in photocatalytic reactions, nitrogen atoms were doped in commercially available photocatalytic TiO2 powders by using an organic compound such as urea and guanidine. Analysis by X-ray photoelectron spectroscopy (XPS) indicated that N atoms were incorporated into two different sites of the bulk phase of TiO2. A significant shift of the absorption edge to a lower energy and a higher absorption in the visible light region were observed. These N-doped TiO2 powders exhibited photocatalytic activity for the decomposition of 2-propanol in aqueous solution under visible light irradiation. The photocatalytic activity increased with the decrease of doped N atoms in O site, while decreased with decrease of the other sites. Degradation of photocatalytic activity based on the release of nitrogen atoms was observed for the reaction in the aqueous suspension system. (c) 2005 Elsevier Ltd. All rights reserved.