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Pyrogenic silica; controlling the flow


Publisher
Elsevier Science
Year
2005
Weight
36 KB
Volume
2005
Category
Article
ISSN
1364-5439

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Chemisorption and hydrolysis of TiCl4 on
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A series of titania-silicas containing from 5 to 30% by mass of TiO 2 has been synthesized by repeating a cycle of chemi-sorption on the SiO2 surface followed by hydrolysis. In the IR spectra of the synthesized samples there is no absorption at 950 cm -1, which shows that the Si-O-(Ti) bond as well

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In 1956, Sears had introduced a simple empirical method to determine the surface area of colloidal silicas. This technique consists in the titration of silanol groups using sodium hydroxide solution and relies on the assumption that the silanol group density is constant. When porosimetric methods be