Sonochemical synthesis of silica particles and their size control
Sonochemical synthesis of silica particles and their size control
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DOI：
10.1016/j.apsusc.2015.12.048
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发表时间：
2016-09-01
影响因子：
6.7
通讯作者：
Kim, Bonghwan
中科院分区：
文献类型：
--
作者：
Kim, Hwa-Min;Lee, Chang-Hyun;Kim, Bonghwan
采用超声波辅助的溶胶-凝胶法，以乙醇、水和正硅酸乙酯为原料，以氨为催化剂，在室温下成功地合成了形状均匀、单分散、大小可控的球形二氧化硅颗粒。二氧化硅粒子的直径分布在40~400 nm之间，扫描电子显微镜对其形貌进行了很好的表征。可以通过选择合适的氢氧化铵和水的浓度来调整二氧化硅颗粒的大小，这反过来又决定了反应过程中颗粒的成核和生长速度。这种基于声化学的二氧化硅合成方法提供了一种在相对较短的反应时间内制备球形二氧化硅颗粒的替代方法。因此，我们认为，这种简单、低成本、高效的制备各种尺寸的均匀二氧化硅颗粒的方法将具有实用和广泛的工业适用性。(C)2015爱思唯尔B.V.保留所有权利。
Using an ultrasound-assisted sol-gel method, we successfully synthesized very uniformly shaped, monodisperse, and size-controlled spherical silica particles from a mixture of ethanol, water, and tetraethyl orthosilicate in the presence of ammonia as catalyst, at room temperature. The diameters of the silica particles were distributed in the range from 40 to 400 nm; their morphology was well characterized by scanning electron microscopy. The silica particle size could be adjusted by choosing suitable concentrations of ammonium hydroxide and water, which in turn determined the nucleation and growth rates of the particles during the reaction. This sonochemical-based silica synthesis offers an alternative way to produce spherical silica particles in a relatively short reaction time. Thus, we suggest that this simple, low-cost, and efficient method of preparing uniform silica particles of various sizes will have practical and wide-ranging industrial applicability. (C) 2015 Elsevier B.V. All rights reserved.