Highly uniform nano and mesostructures of silica obtained by reverse micellar and hydrothermal methods

Ganguli, Ashok ; Ganguly, Aparna (2009) Highly uniform nano and mesostructures of silica obtained by reverse micellar and hydrothermal methods Journal of Cluster Science, 20 (2). pp. 417-427. ISSN 1040-7278

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Official URL: http://www.springerlink.com/index/52041460445375R4...

Related URL: http://dx.doi.org/10.1007/s10876-009-0255-4

Abstract

Silica nanoparticles with controlled size and morphology and a high degree of monodispersity have been synthesized using single and double microemulsion systems employing a cationic surfactant (CTAB) and a non-ionic surfactant (Tergitol). Depending on the type of surfactant aggregate acting as templates, very different morphologies were formed. Nanospindles of silica of ~200-300 nm in length and nanofibres could be obtained by suitably controlling the reverse micellar methodology. The hydrothermal method resulted in highly porous and uniform spheres of diameter ~300 nm which appears to be formed from aggregates of small silica nanoparticles of size ~10 nm. The surface area of the nanoparticles (119 m2/g) was found to be much higher than the corresponding bulk SiO2 (500-600 nm) which had a surface area of 22 m2/g. The hydrothermally obtained spheres of size ~300 nm show a surface area of 35 m2/g.

Item Type:Article
Source:Copyright of this article belongs to Springer.
Keywords:Silica Nanostructures; Reverse Micellar Route; Hydrothermal Treatment
ID Code:91640
Deposited On:23 May 2012 14:20
Last Modified:23 May 2012 14:20

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