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Influence of the initial chemical conditions on the rational design of silica particles

Bourebrab, Marion A.; Oben, Delphine T.; Durand, Géraldine G.; Taylor, Peter G.; Bruce, James I.; Bassindale, Alan R. and Taylor, Alan (2018). Influence of the initial chemical conditions on the rational design of silica particles. Journal of Sol-Gel Science and Technology, 88(2) pp. 430–441.

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DOI (Digital Object Identifier) Link: https://doi.org/10.1007/s10971-018-4821-9
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Abstract

The influence of the water content in the initial composition on the size of silica particles produced using the Stöber process is well known. We have shown that there are three morphological regimes defined by compositional boundaries. At low water levels (below stoichiometric ratio of water:tetraethoxysilane), very high surface area and aggregated structures are formed; at high water content (>40 wt%) similar structures are also seen. Between these two boundary conditions, discrete particles are formed whose size are dictated by the water content. Within the compositional regime that enables the classical Stöber silica, the structural evolution shows a more rapid attainment of final particle size than the rate of formation of silica supporting the monomer addition hypothesis. The clearer understanding of the role of the initial composition on the output of this synthesis method will be of considerable use for the establishment of reliable reproducible silica production for future industrial adoption.

Item Type: Journal Item
Copyright Holders: 2018 The Authors
ISSN: 1573-4846
Keywords: Nanoparticles; Silica particles; Sol-gel; Stöber process
Academic Unit/School: Faculty of Science, Technology, Engineering and Mathematics (STEM) > Life, Health and Chemical Sciences
Faculty of Science, Technology, Engineering and Mathematics (STEM)
Item ID: 57349
SWORD Depositor: Jisc Publications-Router
Depositing User: Jisc Publications-Router
Date Deposited: 29 Oct 2018 10:34
Last Modified: 02 May 2019 09:20
URI: http://oro.open.ac.uk/id/eprint/57349
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