Bandgap narrowing of titanium oxide nanosheets: homogeneous doping of molecular iodine for improved photoreactivity
文献类型：期刊论文
| 作者 | G. Liu ; C. H. Sun ; L. Z. Wang ; S. C. Smith ; G. Q. Lu ; H. M. Cheng |
| 刊名 | Journal of Materials Chemistry
 |
| 出版日期 | 2011 |
| 卷号 | 21期号:38页码:14672-14679 |
| 关键词 | visible-light photocatalysis doped tio2 surface science tantalum oxide photoactivity dioxide anatase degradation irradiation mechanisms |
| ISSN号 | 0959-9428 |
| 中文摘要 | We developed a new strategy for homogeneous doping of iodine molecules (I(2)) to achieve bandgap narrowing of semiconducting metal oxide nanosheets. This was realized by electrostatic interactions between nonpolar I(2) molecules and negatively charged exfoliated metal oxide nanosheets, mediated by the partial polarizability of the molecular iodine. Flocculated titania nanosheets doped with I(2) molecules (I(2)-Ti(0.91)O(2) sheets) were explored as a model system to demonstrate the effectiveness of this strategy. We observed an extension of the intrinsic absorption edge into the visible light region through a shifting of the valence band maximum at high doping levels of I(2) molecules. Importantly, at the same time the geometric structure of the host retained its integrity. The experimental together with first-principles calculations reveal the molecular nature of adsorbed iodine atoms and imply that the mechanism of electronic structure modulation in the titania layers changes depending on the concentration of I(2) molecules. This simple and efficient strategy may be suitable for other charged metal oxide nanosheets with large bandgaps to facilitate the design of new functional materials. |
| 原文出处 | |
| 公开日期 | 2012-04-13 |
| 源URL | [http://210.72.142.130/handle/321006/30516]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 推荐引用方式 GB/T 7714 | G. Liu,C. H. Sun,L. Z. Wang,et al. Bandgap narrowing of titanium oxide nanosheets: homogeneous doping of molecular iodine for improved photoreactivity[J]. Journal of Materials Chemistry,2011,21(38):14672-14679. |
| APA | G. Liu,C. H. Sun,L. Z. Wang,S. C. Smith,G. Q. Lu,&H. M. Cheng.(2011).Bandgap narrowing of titanium oxide nanosheets: homogeneous doping of molecular iodine for improved photoreactivity.Journal of Materials Chemistry,21(38),14672-14679. |
| MLA | G. Liu,et al."Bandgap narrowing of titanium oxide nanosheets: homogeneous doping of molecular iodine for improved photoreactivity".Journal of Materials Chemistry 21.38(2011):14672-14679. |
入库方式： OAI收割
来源：金属研究所
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