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Title of Journal: J SolGel Sci Technol

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Abbravation: Journal of Sol-Gel Science and Technology

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Springer US

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DOI

10.1002/9783527628964.fmatter

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1573-4846

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Smallangle Xray scattering from wet gels prepare

Authors: Dario A Donatti A Ibañez Ruiz Marcio R Vicelli Dimas R Vollet
Publish Date: 2009/04/10
Volume: 51, Issue: 2, Pages: 222-227
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Abstract

Smallangle Xray scattering was used to study the structure of wet gels prepared from cohydrolysis of tetraethoxysilane TEOS and vinyltriethoxysilane VTES in the VTES/VTES + TEOS molar ratio ranging from 0 to 1 The wet gels at pH = 6 behave as a massfractal structure with characteristic size ξ and fractal dimension D both increasing with the amount of VTES from ξ = 678 nm and D = 225 for pure TEOS until an almost homogenous structure with ξ ~ 249 nm and D ~ 285 is obtained for the wet gel prepared with pure VTES The massfractal structures are built up by small primary clusters of characteristic size between ~035 and ~085 nm the size increasing with the quantity of VTES These small particles of the gels are formed by a restructuring process of a few larger macromolecules in the stable sols pH = 2 on passing from the acid to the increasedpH step of the process

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  9. Removal of Pb(II) ions from aqueous systems using thiol-functionalized cobalt-ferrite magnetic nanoparticles
  10. Simple synthesis of Co 3 O 4 nanoflakes using a low temperature sol–gel method suitable for photodegradation of dyes
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  12. Antiwetting silica–gelatin nanohybrid and transparent nano coatings synthesised through an aqueous sol–gel process
  13. Comparison of structure and phase change characteristic of microencapsulated core/shell Al–Si alloy microparticles synthesized by two methods
  14. Bioencapsulation of living yeast ( Pichia pastoris ) with silica after transformation with lysozyme gene
  15. Optical properties of yellow-light-emitting LiZnVO 4 :Eu 3+ phosphor prepared by sol–gel method
  16. CuAl 2 O 4 powder synthesis by sol-gel method and its photodegradation property under visible light irradiation
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  18. Effect of thermal annealing on Nd 2 O 3 -doped silica powder prepared by the solgel process
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  20. Synthesis of LiCoO 2 by l -apple acid assisted sol–gel method and its electrochemical behavior in aqueous lithium-ion battery
  21. Investigation of Br–N Co-doped TiO 2 photocatalysts: preparation and photocatalytic activities under visible light
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