| 离子交换法制备钛酸钾纳米纤维及其表征 |
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| 引用本文： | 王晓冬,金振声,张经纬,杨建军,张治军.离子交换法制备钛酸钾纳米纤维及其表征[J].无机材料学报,2007,22(2):237-242. |
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| 作者姓名： | 王晓冬 金振声 张经纬 杨建军 张治军 |
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| 作者单位： | 1. 中国科学院兰州化学物理研究所, 固体润滑国家重点实验室, 兰州 730000; 2. 河南大学特种功能材料重点实验室, 开封 475001; 3. 中国科学院研究生院, 北京 100049 |
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| 摘 要： | 采用离子交换法, 即以KOH溶液与钛酸纳米管(H2Ti2O4(OH)2)反应, 制备了钛酸钾纳米纤维. 透射电镜(TEM)和X射线衍射分析(XRD)结果表明, 经过离子交换, 形貌由纳米管变为纳米纤维, 晶体结构亦发生改变. 利用原子吸收分光光度法, 比色法和X射线光电子能谱(XPS)对离子交换产物的Ti, K元素的原子比和化学价态进行分析, 结果表明, 离子交换产物的经验式为: K1.34H0.66Ti2O4(OH)2与H2Ti2O4(OH)2纳米管相比, 钛酸钾纳米纤维的热稳定性较好, 700℃以上的热处理才使其晶型发生改变, 出现单斜型的K2Ti4O9. 高温处理导致钛酸钾纳米纤维的直径增加, 但仍保持较大长径比. 该材料的BET比表面积为104m2·g-1.
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| 关 键 词： | 钛酸纳米管 钛酸钾 纳米纤维 离子交换 |
| 文章编号： | 1000-324X（2007）02-0237-06 |
| 收稿时间： | 2006-4-3 |
| 修稿时间： | 2006-04-032006-05-31 |
Preparation and Characterization of Potassium Titanate Nanofiber |
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| WANG Xiao-Dong,JIN Zhen-Sheng,ZHANG Jing-Wei,YANG Jian-Jun,ZHANG Zhi-Jun.Preparation and Characterization of Potassium Titanate Nanofiber[J].Journal of Inorganic Materials,2007,22(2):237-242. |
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| Authors: | WANG Xiao-Dong JIN Zhen-Sheng ZHANG Jing-Wei YANG Jian-Jun ZHANG Zhi-Jun |
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| Affiliation: | 1. State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China; 2. Laboratory for Special Functional Materials, Henan University, Kaifeng 475001, China; 3. Graduate University of the Chinese Academy of Sciences, Beijing 100049, China |
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| Abstract: | Potassium titanate nanofibers ( K1.34H0.66Ti2O4(OH)2) were prepared by using ion-exchange reaction between KOH solution and titanic acid nanotube (H2Ti2O4(OH)2). TEM and XRD results show that the nanotubes change into nanofibers and the crystalline structure alters. K/Ti atomic ratio, chemical state of K and Ti elements for the product were determined by means of atomic absorption spectrophotometry, colorimetric method, and X-ray photoelectron spectroscopy. The results indicate that the empirical formula of the product is K1.34H0.66Ti2O4(OH)2. Compared with H2Ti2O4(OH)2 nanotubes, the thermal-stability of potassium titanate nanofibers is higher. At T>700℃, the crystalline structure of this material changes into monoclinic phase K2Ti4O9. High temperature treatment results in nanofibers’ sizes increasing, but the aspect ratio is still high. The BET surface area of the material is 104m 2·g-1. |
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| Keywords: | titanate acid nanotube potassium titanate nanofiber ion-exchange |
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