|
|||||
|
|
| 离子液体对TiO2结构特点的影响研究 | |
| 引用本文： | 闫智英,彭鹏,朱丽荣,郑文君.离子液体对TiO2结构特点的影响研究[J].云南大学学报(自然科学版),2009,31(4):400-405. |
| 作者姓名： | 闫智英 彭鹏 朱丽荣 郑文君 |
| 作者单位： | 1. 云南大学化学科学与工程学院, 云南昆明 650091; 2. 南开大学化学学院, 材料化学系, 天津 300071; 3. 南开大学高分子研究所, 天津 300071 |
| 摘 要： | 采用低温水热法,以离子液体-水为混合溶剂制备了TiO2纳米颗粒,用XRD,TEM,SAED,N2吸附等技术对产物进行了表征,研究了离子液体对TiO2的晶形、结晶度、晶粒尺寸等结构特点的影响;结果表明:体系中离子液体的含量对TiO2的结晶度、晶粒尺寸有很大影响.当体系中离子液体含量低于水量时,增加离子液体可促进TiO2结晶,反之,则抑制TiO2结晶;在VIL/(VIL+VH2O)=0.5时所得产物有最高锐钛矿相结晶度.此外,在一定范围内,离子液体可调控TiO2的晶粒尺寸.从离子液体-水溶液的粘度、电导率及溶液微结构变化等方面讨论了离子液体对TiO2形成的影响. |
| 关 键 词： | TiO2 晶相 结晶度 离子液体 |
| 收稿时间： | 2008-9-27 |
Effect of ionic liquid on the structural characteristics of TiO2 |
|
| YAN Zhi-ying,PENG Peng,ZHU Li-rong,ZHENG Wen-jun.Effect of ionic liquid on the structural characteristics of TiO2[J].Journal of Yunnan University(Natural Sciences),2009,31(4):400-405. | |
| Authors: | YAN Zhi-ying PENG Peng ZHU Li-rong ZHENG Wen-jun |
| Institution: | 1. School Chemical of Science and Technology, Yunnan University, Kunming 650091, China; 2. Department of Materials Chemistry, Nankai University, Tianjin 300071, China; 3. Key Laboratory of Functional Polymer Materials Ministry of Education, Nankai University, Tianjin 300071, China |
| Abstract: | Alow-temperature hydrothermal method with room temperature ionic liquid(IL,1-ethyl-3-methyl-imidazole acetate) and water mixture as solvent was used to prepare nanocrystalline TiO2 powders.The crystal phase,morphology,and grain size of the products were characterized by using X-ray diffraction(XRD),transmission electron microscopy(TEM) and selected area electron diffraction(SAED) techniques.It was found that high crystalline anatase TiO2 nanoparticles could be obtained at specific ILconcentrations.When ILvolume fraction was <0.5,crystallization of TiO2 could be enhanced with increasing the amount of ILin reaction medium,and vice versa.Besides,grain size of TiO2 nanoparticles could be tuned in a certain extent by changing the ratio of water and IL.These results were thought to be related with the ionic strength,viscosity and micro-structure of IL-water solution. |
| Keywords: | |
| 点击此处可从《云南大学学报(自然科学版)》浏览原始摘要信息 | |
| 点击此处可从《云南大学学报(自然科学版)》下载免费的PDF全文 | |