NDLI: Formation of Silica Gels Composed of Micrometer-Sized Particles by the Sol–Gel Method

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Formation of Silica Gels Composed of Micrometer-Sized Particles by the Sol–Gel Method

Content Provider	Scilit
Author	Bergna, Horacio E. Roberts, William O.
Copyright Year	2005
Description	Micrometer-Sized Particles . . . . . . . . . . . . . . . . . . . . 92 Process for Making Gels . . . . . . . . . . . . . . . . . . . . . 92 Effect of H2O and Hcl Content of the Starting Solutions . . . . . . . . . . . . . . . . . . . . . . . . . . 92 Effect of the Concentration of the Solutions . . . . . . 93 Effect of the Kind of Alkoxides, Acids, and Alcohols . . . . . . . . . . . . . . . . . . . . . . . . 93 Mechanism of the Formation of Micrometer-Sized Particles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93 29Si NMR Spectra of the Gels . . . . . . . . . . . . . . . . . 93 Instability of Particles in Organic Liquids . . . . . . . 94 Instability of Particles under Centrifugation . . . . . . 94 Mechanism of the Formation of Round Particles . . 95 Surface Changes in the Ambient Atmosphere . . . . 95 Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96 References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97 Formation of silica gels composed of micrometer-sized particles from highly acidic solutions of tetramethox- ysilane (TMOS) is described. In this method a limited amount of H2O and a large amount of HCl are used in hydrolyzing TMOS. Detailed conditions and the mechanism of the formation of micrometer-sized particles in the solutions are discussed. Applications of the gels are also described. Book Name: Colloidal Silica
Related Links	https://content.taylorfrancis.com/books/download?dac=C2009-0-08403-6&isbn=9780429116582&doi=10.1201/9781420028706-14&format=pdf
Ending Page	126
Page Count	8
Starting Page	119
DOI	10.1201/9781420028706-14
Language	English
Publisher	Informa UK Limited
Publisher Date	2005-12-19
Access Restriction	Open
Subject Keyword	Book Name: Colloidal Silica Instability Micrometer Sized Particles
Content Type	Text
Resource Type	Chapter

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