Structure and contribution to photocatalytic activity of the interfaces in nanofibers with mixed anatase and TiO2(B) phases
文献类型：期刊论文
| 作者 | Zheng, Zhanfeng1; Liu, Hongwei1; Ye, Jianping2; Zhao, Jincai2; Waclawik, Eric R.1; Zhu, Huaiyong1 |
| 刊名 | JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL
 |
| 出版日期 | 2010-02-01 |
| 卷号 | 316期号:1-2页码:75-82 |
| 关键词 | Interface Structure Anatase Tio2(b) Photocatalytic Activity Nanofibers |
| ISSN号 | 1381-1169 |
| DOI | 10.1016/j.molcata.2009.10.002 |
| 英文摘要 | Fibril photocatalyst of mixed TiO2(B) and anatase phases, pure TiO2(B) and pure anatase are obtained by calcining titanate nanofibers prepared via hydrothermal reaction at different temperatures between 300 and 700 degrees C. They are used to verify the theory that the difference between the conduction band edges of the two phases may produce charge transfer from one phase to the other. which results in effectively the photo-generated charge separation and thus facilitates the redox reaction involving these charges. Indeed, the mixed-phase nanofibers exhibit higher photocatalytic activity for degradation of sulforhodamine B (SRB) under UV light than the nanofibers of either pure phase alone, or the mechanical mixtures of the two pure phase nanofibers with a similar phase composition. The interfaces between the two phases have a function of preventing charge recombination and enhancing the activity for photocatalytic oxidation. These interfaces are not random contacts between the crystals of the two phases, but form from well-matched lattice planes of the two phases. For instance, (202) planes in anatase and (202) planes of TiO2(B) are similar in cl-spaces similar to 0.18 nm, and they join together to form a stable interface. Such an interface structure is advanced for charge transfer crossing the interfaces, which reduces the recombination between the photo-generated electrons and holes. The knowledge acquired in this study is important not only for design of efficient TiO2 photocatalysts but also for understanding the photocatalysis process. (C) 2009 Elsevier B.V. All rights reserved. |
| 语种 | 英语 |
| WOS记录号 | WOS:000273890300010 |
| 出版者 | ELSEVIER SCIENCE BV |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/69959]  |
| 专题 | 中国科学院化学研究所 |
| 通讯作者 | Zhu, Huaiyong |
| 作者单位 | 1.Queensland Univ Technol, Sch Phys & Chem Sci, Inorgan Mat Res Program, Brisbane, Qld 4001, Australia 2.Chinese Acad Sci, Inst Chem, Beijing 100080, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zheng, Zhanfeng,Liu, Hongwei,Ye, Jianping,et al. Structure and contribution to photocatalytic activity of the interfaces in nanofibers with mixed anatase and TiO2(B) phases[J]. JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL,2010,316(1-2):75-82. |
| APA | Zheng, Zhanfeng,Liu, Hongwei,Ye, Jianping,Zhao, Jincai,Waclawik, Eric R.,&Zhu, Huaiyong.(2010).Structure and contribution to photocatalytic activity of the interfaces in nanofibers with mixed anatase and TiO2(B) phases.JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL,316(1-2),75-82. |
| MLA | Zheng, Zhanfeng,et al."Structure and contribution to photocatalytic activity of the interfaces in nanofibers with mixed anatase and TiO2(B) phases".JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL 316.1-2(2010):75-82. |
入库方式： OAI收割
来源：化学研究所
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