极稀溶液体系中自组装合成纳米介孔氧化硅及其铝修饰材料

高等学校化学学报 ›› 2009, Vol. 30 ›› Issue (6): 1055.

极稀溶液体系中自组装合成纳米介孔氧化硅及其铝修饰材料

成红云^1,2, 史彦涛², 南海明², 耿怡², 陈保华¹, 蔡强²

1. 兰州大学化学化工学院, 功能有机分子化学国家重点实验室, 兰州 730000;
2. 清华大学材料科学与工程系先进材料实验室, 北京 100084

收稿日期:2009-02-25 出版日期:2009-06-10 发布日期:2009-06-10
通讯作者: 陈保华, 男, 博士, 教授, 博士生导师, 主要从事有机化学研究. E-mail: chbh@lzu.edu.cn
基金资助:
国家自然科学基金(批准号: 50572046, 50573043)和教育部重点项目基金(批准号: 107108)资助.

Preparation of Nano-sized Mesoporous Silica Dioxide and Al-doped Silica Dioxide at Extremely Low Reactant Concentration

CHENG Hong-Yun^1,2, SHI Yan-Tao², NAN Hai-Ming², GENG Yi², CHEN Bao-Hua¹*, CAI Qiang²

1. State Key Laboratory of Applied Organic Chemistry, Department of Chemistry & Chemical Engineering, Lanzhou University, Lanzhou 730000, China;
2. Laboratory of Advanced Materials, Department of Materials Science & Engineering, Tsinghua University, Beijing 100084, China

Received:2009-02-25 Online:2009-06-10 Published:2009-06-10
Contact: CHEN Bao-Hua, E-mail: chbh@lzu.edu.cn
Supported by:
国家自然科学基金(批准号: 50572046, 50573043)和教育部重点项目基金(批准号: 107108)资助.

摘要/Abstract

摘要：

在极稀溶液中, 通过改变反应溶剂去离子水的量或原料中铝源的量, 可控合成了不同粒径(20~70 nm)、形貌和孔道结构的纳米介孔氧化硅颗粒和纳米介孔铝掺杂氧化硅材料. 这种材料具有高比表面积(BET比表面积1000 m²/g)和较大的孔容(1.1~1.8 cm³/g). 反应物浓度降低或反应物中添加铝源后, 介孔材料的有序性下降, 粒径减小, 孔容增大, 并产生大量的间隙孔. 通过小角X射线衍射(SAXRD)、透射电镜和氮气吸附-脱附实验表征了样品.

关键词: 极稀溶液, 纳米介孔氧化硅, 自组装, 形貌控制, 铝掺杂

Abstract:

Syntheses of nano-sized mesoporous silica dioxide and that with Al doped were preformed at extremely low reactant concentration, and the products were controllable in size(20—70 nm), morphology and pore structure by changing the amount of deionized water or Al source in the reaction. The samples were of high BET surface area(more than 1000 m²/g) and pore volume(1.1—1.8 cm³/g). The pore structure became less ordered, the particle size decreased, the pore volume increased and a certain accumulation of holes appeared when decreasing reactants concentration or introducing Al source in the reaction. The nano-sized mesoporous samples were characterized by transmission electron microscopy(TEM), small-angle X-ray diffraction, and nitrogen adsorption/desorption techniques.

Key words: Extremely low reactant concentration, Nano-sized mesoporous silica dioxide, Self-assembly, Morphology control, Al-doped

中图分类号:

O614

TrendMD:

成红云, 史彦涛, 南海明, 耿怡, 陈保华, 蔡强. 极稀溶液体系中自组装合成纳米介孔氧化硅及其铝修饰材料. 高等学校化学学报, 2009, 30(6): 1055.

CHENG Hong-Yun, SHI Yan-Tao, NAN Hai-Ming, GENG Yi, CHEN Bao-Hua*, CAI Qiang. Preparation of Nano-sized Mesoporous Silica Dioxide and Al-doped Silica Dioxide at Extremely Low Reactant Concentration. Chem. J. Chinese Universities, 2009, 30(6): 1055.

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