Synthesis and Characterization of Amorphous Silica Nanoparitcles from Aqueous Silicates Uisng Cationic Surfactants

被引：57

作者：

Abou Rida, Maurice ^{[1
]}

Harb, Faouzi ^{[2
]}

机构：

[1] Lebanese Univ, Lab Mol Chem, Fac Sci 2, Fanar, Lebanon

[2] Lebanese Univ, Lab Solid State React, Fac Sci 2, Fanar, Lebanon

来源：

JOURNAL OF METALS MATERIALS AND MINERALS | 2014年 / 24卷 / 01期

关键词：

Silica; Sodium silicate; Cationic surfactant; Cost-effective; sol-gel; Microwave drying;

D O I：

10.14456/jmmm.2014.7

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

In this work amorphous silica was synthesized using sodium silicate and hydrochloric acid by precipitation according to Stober method. A system of chemical reactions has been developed which permits the controlled growth of silica particles using two different cationic surfactants as the dispersing agents. These surfactants were cetyltrimethylammonium bromide [CTAB] and dodecyltrimethylammonium bromide [DTAB]. The synthesized silicas were characterized by using X-ray diffraction (XRD), Infrared Spectroscopy (IR), Scanning Electron Microscopy (SEM), Energy Dispersive Spectroscopy (EDX) and Dynamic light scattering (DLS). Addition of a dispersing agent in the reaction reduced the particle size of the silica produced. The average size of silica nanoparticles can be finely tuned in the range 148-212 nm by changing the chain length of cationic surfactant. XRD results showed that the synthesized silica was predominantly amorphous.

引用

页码：37 / 42

页数：6