Copper doped TiO2 nanoparticles characterized by X-ray absorption spectroscopy, total scattering, and powder diffraction - a benchmark structure-property study
文献类型：期刊论文
| 作者 | Lock, N ; Jensen, EML ; Mi, JL ; Mamakhel, A ; Noren, K ; Meng, QB ; Iversen, BB |
| 刊名 | DALTON TRANSACTIONS
 |
| 出版日期 | 2013 |
| 卷号 | 42期号:26页码:9555 |
| ISSN号 | 1477-9226 |
| 通讯作者 | Iversen, BB (reprint author), Ctr Mat Crystallog, Dept Chem, DK-8000 Aarhus C, Denmark. |
| 中文摘要 | Metal functionalized nanoparticles potentially have improved properties e. g. in catalytic applications, but their precise structures are often very challenging to determine. Here we report a structural benchmark study based on tetragonal anatase TiO2 nanoparticles containing 0-2 wt% copper. The particles were synthesized by continuous flow synthesis under supercritical water-isopropanol conditions. Size determination using synchrotron PXRD, TEM, and X-ray total scattering reveals 5-7 nm monodisperse particles. The precise dopant structure and thermal stability of the highly crystalline powders were characterized by X-ray absorption spectroscopy and multi-temperature synchrotron PXRD (300-1000 K). The combined evidence reveals that copper is present as a dopant on the particle surfaces, most likely in an amorphous oxide or hydroxide shell. UV-VIS spectroscopy shows that copper presence at concentrations higher than 0.3 wt% lowers the band gap energy. The particles are unaffected by heating to 600 K, while growth and partial transformation to rutile TiO2 occur at higher temperatures. Anisotropic unit cell behavior of anatase is observed as a consequence of the particle growth (a decreases and c increases). |
| 资助信息 | Danish Strategic Research Council (Center for Energy Materials); Danish National Research Foundation (Center for Materials Crystallography, DNRF93); Villum Foundation; Danish Research Council of Nature and Universe (Danscatt) |
| 语种 | 英语 |
| 公开日期 | 2014-01-16 |
| 源URL | [http://ir.iphy.ac.cn/handle/311004/56846]  |
| 专题 | 物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文 |
| 推荐引用方式 GB/T 7714 | Lock, N,Jensen, EML,Mi, JL,et al. Copper doped TiO2 nanoparticles characterized by X-ray absorption spectroscopy, total scattering, and powder diffraction - a benchmark structure-property study[J]. DALTON TRANSACTIONS,2013,42(26):9555. |
| APA | Lock, N.,Jensen, EML.,Mi, JL.,Mamakhel, A.,Noren, K.,...&Iversen, BB.(2013).Copper doped TiO2 nanoparticles characterized by X-ray absorption spectroscopy, total scattering, and powder diffraction - a benchmark structure-property study.DALTON TRANSACTIONS,42(26),9555. |
| MLA | Lock, N,et al."Copper doped TiO2 nanoparticles characterized by X-ray absorption spectroscopy, total scattering, and powder diffraction - a benchmark structure-property study".DALTON TRANSACTIONS 42.26(2013):9555. |
入库方式： OAI收割
来源：物理研究所
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