|
|||||
|
|
| Preparation of High-Surface Area Nano-CeO2 by Template-Assisted Precipitation Method | |
| 引用本文： | 王月娟 马静萌 罗孟飞 方萍 何迈. Preparation of High-Surface Area Nano-CeO2 by Template-Assisted Precipitation Method[J]. 中国稀土学报(英文版), 2007, 25(1): 58-62. DOI: 10.1016/S1002-0721(07)60045-3 |
| 作者姓名： | 王月娟 马静萌 罗孟飞 方萍 何迈 |
| 作者单位： | Zhejiang Key Laboratory for Reactive Chemistry on Solid Surfaces, Institute of Physical Chemistry, ZhejiangNormal University, Jinhua 321004, China |
| 基金项目： | Project supported by the National Natural Science Foundation of China （20473075） |
| 摘 要： | The high-surface area nano-CeO2 was prepared by Ce（NO3）3 by precipitation method, with surfactant cetyhrimethyl ammonium bromide （CTAB） as templating agent. The effects of the precipitating agents, reaction temperature, ageing time, and calcination temperature on the surface area, as well as the pore structure and the mean crystallite size of nano-CeO2 were studied. It was found that the reaction of Ce（NO3）3 with NaOH in the presence of CTAB at 90℃ for 12 h yieldsed a cerium oxide/surfaetant mixture, which after calcination at 400℃ resulted in high-surface area nano-CeO2. The mean crystallite size of CeO2 was approximately 6 nm, surface area was in excess of 200 m^2· g ^- 1, pore size was approximately 9 nm, and the pore distribution was concentrative. Moreover, the surface area can still reach 147 m^2·g^- 1 after calcination at 700 ℃, which showed the good thermal stability of the CeO2. The number of oxygen vacancies in the structure of CeO2 corresponded with the surface area of CeO2, and the high surface area was propitious to the formalion of oxygen vacancies. |
| 关 键 词： | 纳米二氧化铈 稀土元素 纳米技术 表面积 模板辅助沉淀法 |
| 文章编号： | 1002-0721（2007）01-0058-05 |
| 收稿时间： | 2006-04-17 |
| 修稿时间： | 2006-04-172006-09-06 |
Preparation of High-Surface Area Nano-CeO2 by Template-Assisted Precipitation Method |
|
| Wang , Ma Jingmeng, Luo Mengfei, Fang Ping,He Mai. Preparation of High-Surface Area Nano-CeO2 by Template-Assisted Precipitation Method[J]. Journal of Rare Earths, 2007, 25(1): 58-62. DOI: 10.1016/S1002-0721(07)60045-3 | |
| Authors: | Wang Ma Jingmeng Luo Mengfei Fang Ping He Mai |
| Affiliation: | Zhejiang Key Laboratory for Reactive Chemistry on Solid Surfaces, Institute of Physical Chemistry, Zhejiang Normal University, Jinhua 321004, China |
| Abstract: | The high-surface area nano-CeO2 was prepared by Ce(NO3)3 by precipitation method, with surfactant cetyltrimethyl ammonium bromide (CTAB) as templating agent. The effects of the precipitating agents, reaction temperature, ageing time, and calcination temperature on the surface area, as well as the pore structure and the mean crystallite size of nano-CeO2 were studied. It was found that the reaction of Ce(NO3)3 with NaOH in the presence of CTAB at 90 ℃ for 12 h yieldsed a cerium oxide/surfactant mixture, which after calcination at 400 ℃ resulted in high-surface area nano-CeO2. The mean crystallite size of CeO2 was approximately 6 nm, surface area was in excess of 200 m2·g-1, pore size was approximately 9 nm, and the pore distribution was concentrative. Moreover, the surface area can still reach 147 m2·g-1 after calcination at 700 ℃, which showed the good thermal stability of the CeO2. The number of oxygen vacancies in the structure of CeO2 corresponded with the surface area of CeO2, and the high surface area was propitious to the formation of oxygen vacancies. |
| Keywords: | nano-ceria CTAB surface area rare earths |
| 本文献已被 维普 ScienceDirect 等数据库收录！ | |