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GENERAL PRINCIPLES OF SOL - GEL

Year 2013, Volume: 31 Issue: 4, 456 - 476, 01.12.2013

Abstract

The sol–gel synthesis based on the hydrolysis and condensation of molecular precursors is used to prepare a wide range of inorganic materials. The sol-gel technique is a very convenient method of obtaining both inorganic and hybrid organic-inorganic polymers. Basic advantage of this technique is carrying out the whole process at very gentle conditions. In contrast to solid-state processes, sol- gel processes offer the possibility to control the reaction pathways on a molecular level during the transformation of the precursor species to the final product. In this way, sol-gel processes enable the synthesis of nanoparticles with well-defined and uniform crystal morphologies and with superior purity and homogeneity. Sol-gel chemistry is a quite complex process, on the one hand due to the high reactivity of the metal oxide precursors towards water and the double role of water as ligand and solvent, and, on the other hand, due to the large number of reaction parameters that have to be strictly controlled (hydrolysis and condensation rate of the metal oxide precursors, pH, temperature, method of mixing, rate of oxidation, etc.) in order to provide good reproducibility of the synthesis protocol. Therefore, the main target of the present review is to explain the basic principles of sol-gel process and to evaluate the parameters that are effective in the sol- gel processes.

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There are 64 citations in total.

Details

Primary Language English
Subjects Chemical Engineering
Journal Section Reviews
Authors

Şafak Toygun This is me

Gülhan Köneçoğlu This is me

Yasemen Kalpaklı This is me

Publication Date December 1, 2013
Submission Date November 16, 2012
Published in Issue Year 2013 Volume: 31 Issue: 4

Cite

Vancouver Toygun Ş, Köneçoğlu G, Kalpaklı Y. GENERAL PRINCIPLES OF SOL - GEL. SIGMA. 2013;31(4):456-7.

IMPORTANT NOTE: JOURNAL SUBMISSION LINK https://eds.yildiz.edu.tr/sigma/