Expanding mesoporosity of triblock-copolymer-templated silica under weak synthesis acidity
文献类型：期刊论文
| 作者 | Li, Jinjun ; Hu, Qin ; Tian, Hua ; Ma, Chunyan ; Li, Landong ; Cheng, Jie ; Hao, Zhengping ; Qiao, Shizhang |
| 刊名 | JOURNAL OF COLLOID AND INTERFACE SCIENCE
 |
| 出版日期 | 2009-11-01 |
| 卷号 | 339期号:1页码:160-167 |
| 关键词 | SBA-15 Weak acidity Large pore volume Short mesochannel Mesoporous silica Wormhole structure Textural porosity |
| 中文摘要 | With initial aging at low temperature for enough time, silicas with large mesoporosity were synthesized using triblock copolymer as template agent under weak acidities. SBA-15 with periodic mesostructure and short mesochannels could be synthesized at pH 2.5-3.0 within weak acidity range, and the surface areas, pore diameters and pore volumes reached up to ca. 1000 m(2)/g, 8.8 nm and 2.0 cm(3)/g, respectively, which were significantly higher than those of the conventional SBA-15 synthesized under strong acidities. Mesoporous silica with wormhole structure and abundant textural porosity was formed at pH similar to 3.5. The increased hydrophobic volume of the copolymer micelles at elevated pH values was responsible for the enlargement of mesoporosity in the products. The materials synthesized under weak acidities showed lower hexagonal ordering in comparison to the general SBA-15 synthesized under strong acidities because the decreased hydronium ion concentration induced relatively weaker assembly forces during the synthesis. Nonetheless, the short mesochannels and large pore diameter in the products might be beneficial to some applications in which fast diffusion of molecules is required. (C) 2009 Elsevier Inc. All rights reserved. |
| WOS记录号 | WOS:000272262900019 |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/21597]  |
| 专题 | 生态环境研究中心_环境纳米材料实验室 |
| 推荐引用方式 GB/T 7714 | Li, Jinjun,Hu, Qin,Tian, Hua,et al. Expanding mesoporosity of triblock-copolymer-templated silica under weak synthesis acidity[J]. JOURNAL OF COLLOID AND INTERFACE SCIENCE,2009,339(1):160-167. |
| APA | Li, Jinjun.,Hu, Qin.,Tian, Hua.,Ma, Chunyan.,Li, Landong.,...&Qiao, Shizhang.(2009).Expanding mesoporosity of triblock-copolymer-templated silica under weak synthesis acidity.JOURNAL OF COLLOID AND INTERFACE SCIENCE,339(1),160-167. |
| MLA | Li, Jinjun,et al."Expanding mesoporosity of triblock-copolymer-templated silica under weak synthesis acidity".JOURNAL OF COLLOID AND INTERFACE SCIENCE 339.1(2009):160-167. |
入库方式： OAI收割
来源：生态环境研究中心
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