Phase transition between nanostructures of titanate and titanium dioxides via simple wet-chemical reactions
文献类型：期刊论文
| 作者 | Zhu, HY; Lan, Y; Gao, XP; Ringer, SP; Zheng, ZF; Song, DY; Zhao, JC |
| 刊名 | JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
 |
| 出版日期 | 2005-05-11 |
| 卷号 | 127期号:18页码:6730-6736 |
| ISSN号 | 0002-7863 |
| DOI | 10.1021/ja044689+ |
| 英文摘要 | Titanate nanofibers of various sizes and layered structure were prepared from inorganic titanium compounds by hydrothermal reactions. These fibers are different from "refractory" mineral substances because of their dimension, morphology, and significant large ratio of surface to volume, and, surprisingly, they are highly reactive. We found, for the first time, that phase transitions from the titanate nanostructures to TiO2 polymorphs take place readily in simple wet-chemical processes at temperatures close to ambient temperature. In acidic aqueous dispersions, the fibers transform to anatase and rutile nanoparticles, respectively, but via different mechanisms. The titanate fibers prepared at lower hydrothermal temperatures transform to TiO2 polymorphs at correspondingly lower temperatures because they are thinner, possess a larger surface area and more defects, and possess a less rigid crystal structure, resulting in lower stability. The transformations are reversible: in this case, the obtained TiO2 nanocrystals reacted with concentrate NaOH solution, yielding hollow titanate nanotubes. Consequently, there are reversible transformation pathways for transitions between the titanates and the titanium dioxide polymorphs, via wet-chemical reactions at moderate temperatures. The significance of these findings arises because such transitions can be engineered to produce numerous delicate nanostructures under moderate conditions. To demonstrate the commercial application potential of these processes, we also report titanate and TiO2 nanostructures synthesized directly from rutile minerals and industrial-grade rutiles by a new scheme of hydrometallurgical reactions. |
| 语种 | 英语 |
| WOS记录号 | WOS:000229055800047 |
| 出版者 | AMER CHEMICAL SOC |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/56245]  |
| 专题 | 中国科学院化学研究所 |
| 通讯作者 | Zhu, HY |
| 作者单位 | 1.Univ Sydney, Australian Key Ctr Microanal & Microscopy, Sydney, NSW 2006, Australia 2.Univ Sydney, Sch Chem, Sydney, NSW 2006, Australia 3.Nankai Univ, Inst New Energy Mat Chem, Dept Chem Mat, Tianjin 300071, Peoples R China 4.Chinese Acad Sci, Inst Chem, Beijing 100080, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhu, HY,Lan, Y,Gao, XP,et al. Phase transition between nanostructures of titanate and titanium dioxides via simple wet-chemical reactions[J]. JOURNAL OF THE AMERICAN CHEMICAL SOCIETY,2005,127(18):6730-6736. |
| APA | Zhu, HY.,Lan, Y.,Gao, XP.,Ringer, SP.,Zheng, ZF.,...&Zhao, JC.(2005).Phase transition between nanostructures of titanate and titanium dioxides via simple wet-chemical reactions.JOURNAL OF THE AMERICAN CHEMICAL SOCIETY,127(18),6730-6736. |
| MLA | Zhu, HY,et al."Phase transition between nanostructures of titanate and titanium dioxides via simple wet-chemical reactions".JOURNAL OF THE AMERICAN CHEMICAL SOCIETY 127.18(2005):6730-6736. |
入库方式： OAI收割
来源：化学研究所
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