A novel method for synthesis of silica nanoparticles
A novel method for synthesis of silica nanoparticles
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DOI：
10.1016/j.jcis.2005.02.019
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发表时间：
2005-09-01
影响因子：
9.9
通讯作者：
Makino, K
中科院分区：
文献类型：
--
作者：
Rao, KS;El-Hami, K;Makino, K
首次采用序贯法制备了单分散、大小均匀的二氧化硅纳米颗粒。通过正硅酸乙酯(TEOS)在乙醇介质中的水解制得二氧化硅颗粒，并详细研究了不同试剂对二氧化硅颗粒大小的影响。合成了20-460 nm的不同尺寸的纳米粒子。分别用氨(2.8~2 8m ol L-1)、乙醇(1~8m o l L-1)、水(3~14m o l L-1)和正硅酸乙酯(0.012-0.12m o l L-1)试剂，在扫描电子显微镜和透射电子显微镜下观察其粒径。此外，还研究了温度对颗粒大小的影响。本研究得到的结果与用紫外可见分光光度法测量二氧化硅颗粒的电子吸收行为的结果是一致的。(C)2005 Elsevier Inc.保留所有权利。
A sequential method has been used, for the first time, to prepare monodisperse and uniform-size silica nanoparticles using ultrasonication by sol-gel process. The silica particles were obtained by hydrolysis of tetraethyl orthosilicate (TEOS) in ethanol medium and a detailed study was carried out on the effect of different reagents on particle sizes. Various-sized particles in the range 20-460 nm were synthesized. The reagents ammonia (2.8-28 mol L-1), ethanol (1-8 mol L-1), water (3-14 mol L-1), and TEOS (0.012-0.12 mol L-1) were used and particle size was examined under scanning electron microscopy and transmission electron microscopy. In addition to the above observations, the effect of temperature on particle size was studied. The results obtained in the present study are in agreement with the results observed for the electronic absorption behavior of silica particles, which was measured by UV-vis spectrophotometry. (c) 2005 Elsevier Inc. All rights reserved.