A reverse slipping strategy for bulk-reduced TiO2-x preparation from Magneli phase Ti4O7
文献类型：期刊论文
| 作者 | Huang, JT; Che, XL; Xu, JJ; Zhao, W; Xu, FF; Huang, FQ |
| 刊名 | INORGANIC CHEMISTRY FRONTIERS
 |
| 出版日期 | 2020-01-07 |
| 期号 | 1页码:212 |
| ISSN号 | 2052-1553 |
| DOI | 10.1039/c9qi01042d |
| 文献子类 | Article |
| 英文摘要 | Black TiO2-x is an attractive material due to its adjustable band structure, useful in different applications, and has been heavily investigated and developed. The current reduction of TiO2 involves a process from surface to center: thus, the issue of either insufficient or excessive reduction seems inevitable. To the best of our knowledge, it is rarely reported that a homogeneous defect distribution can be facilely achieved inside black TiO2-x. In this study, a bulk-reduced rutile TiO2-x was obtained via a circuitous two-step approach, with an intermediate Magneli phase (TinO2n-1). With the decomposition of a solid atmosphere creator (e.g. KClO4 grains) at a high temperature, the missing oxygen ions in Ti4O7 could be replenished quantitatively. The TEM and SAED results reveal that the oxidation process is not just a surface reaction, but it involves reverse displacement or structural rearrangement inside the crystal. In particular, the periodic variation of crystallographic sheer planes was the direct evidence of the above bulk reaction, i.e. unified long period for Ti4O7 and varied long period for critical ratio sample. The as-prepared samples showed different band gaps and colors, based on their oxygen content. KClO4, with a critical mixing ratio of around 17.5 mol%, could almost oxidize Ti4O7 to black rutile TiO2-x. Furthermore, the sample formed at the critical ratio showed a considerable photo-thermal response speed of 1.7 degrees C s(-1) and an equilibrium temperature of up to 70 degrees C under irradiation with light above 400 nm, which can be an evidence for the enhancement of non-intrinsic absorption. In short, this study provides a new route for the controllable preparation of black TiO2-x, and a possibility for further development of other solid atmosphere creators. |
| WOS关键词 | TITANIUM-DIOXIDE ; BLACK TITANIA ; PHOTOCATALYTIC HYDROGEN ; SOLAR ABSORPTION ; NANOTUBE ARRAYS ; WATER ; PHOTOOXIDATION ; SEMICONDUCTOR ; LOCALIZATION ; ENERGY |
| WOS研究方向 | Chemistry |
| 语种 | 英语 |
| 出版者 | ROYAL SOC CHEMISTRY |
| 源URL | [http://ir.sic.ac.cn/handle/331005/28385]  |
| 专题 | 中国科学院上海硅酸盐研究所 |
| 推荐引用方式 GB/T 7714 | Huang, JT,Che, XL,Xu, JJ,et al. A reverse slipping strategy for bulk-reduced TiO2-x preparation from Magneli phase Ti4O7[J]. INORGANIC CHEMISTRY FRONTIERS,2020(1):212. |
| APA | Huang, JT,Che, XL,Xu, JJ,Zhao, W,Xu, FF,&Huang, FQ.(2020).A reverse slipping strategy for bulk-reduced TiO2-x preparation from Magneli phase Ti4O7.INORGANIC CHEMISTRY FRONTIERS(1),212. |
| MLA | Huang, JT,et al."A reverse slipping strategy for bulk-reduced TiO2-x preparation from Magneli phase Ti4O7".INORGANIC CHEMISTRY FRONTIERS .1(2020):212. |
入库方式： OAI收割
来源：上海硅酸盐研究所
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