Titania sols and gels synthesized from reverse micelles

TiO 2 nanoparticles are synthesized in water/AOT/isooctane reverse micelles by hydrolysis of titanium (IV) n-butoxide. The molar ratios of the three components defines the size of nanoparticles as determined from the uv-visible absorption onset of the disperse system. Depending on the relative conte...

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Detalles Bibliográficos
Autores principales: Ginzberg, B., Bilmes, S.A.
Formato: SER
Materias:
Gel
Nanoparticles
Reverse micelles
Sol-gel
Titanium dioxide
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_0340255X_v102_n_p51_Ginzberg
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_0340255X_v102_n_p51_Ginzberg
record_format dspace
spelling todo:paper_0340255X_v102_n_p51_Ginzberg2023-10-03T15:25:34Z Titania sols and gels synthesized from reverse micelles Ginzberg, B. Bilmes, S.A. Gel Nanoparticles Reverse micelles Sol-gel Titanium dioxide TiO 2 nanoparticles are synthesized in water/AOT/isooctane reverse micelles by hydrolysis of titanium (IV) n-butoxide. The molar ratios of the three components defines the size of nanoparticles as determined from the uv-visible absorption onset of the disperse system. Depending on the relative content of each component this sol undergoes a gel phase. The kinetics of sol-gel process is monitored for different Ti(BuO) 4 ./ water/AOT molar ratios, and as a function of temperature by static viscosity, and by the optical density of the system in the spectral range where light scattering is the dominant optical process. The water content of the system and the Ti(BuO) 4 /water molar ratio have great influence on the kinetics of the gelation process. An activation energy of (91 ± 9) kJmol -1 was obtained from Arrhenius plots. Fil:Bilmes, S.A. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. SER info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_0340255X_v102_n_p51_Ginzberg
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Gel
Nanoparticles
Reverse micelles
Sol-gel
Titanium dioxide
spellingShingle Gel
Nanoparticles
Reverse micelles
Sol-gel
Titanium dioxide
Ginzberg, B.
Bilmes, S.A.
Titania sols and gels synthesized from reverse micelles
topic_facet Gel
Nanoparticles
Reverse micelles
Sol-gel
Titanium dioxide
description TiO 2 nanoparticles are synthesized in water/AOT/isooctane reverse micelles by hydrolysis of titanium (IV) n-butoxide. The molar ratios of the three components defines the size of nanoparticles as determined from the uv-visible absorption onset of the disperse system. Depending on the relative content of each component this sol undergoes a gel phase. The kinetics of sol-gel process is monitored for different Ti(BuO) 4 ./ water/AOT molar ratios, and as a function of temperature by static viscosity, and by the optical density of the system in the spectral range where light scattering is the dominant optical process. The water content of the system and the Ti(BuO) 4 /water molar ratio have great influence on the kinetics of the gelation process. An activation energy of (91 ± 9) kJmol -1 was obtained from Arrhenius plots.
format SER
author Ginzberg, B.
Bilmes, S.A.
author_facet Ginzberg, B.
Bilmes, S.A.
author_sort Ginzberg, B.
title Titania sols and gels synthesized from reverse micelles
title_short Titania sols and gels synthesized from reverse micelles
title_full Titania sols and gels synthesized from reverse micelles
title_fullStr Titania sols and gels synthesized from reverse micelles
title_full_unstemmed Titania sols and gels synthesized from reverse micelles
title_sort titania sols and gels synthesized from reverse micelles
url http://hdl.handle.net/20.500.12110/paper_0340255X_v102_n_p51_Ginzberg
work_keys_str_mv AT ginzbergb titaniasolsandgelssynthesizedfromreversemicelles
AT bilmessa titaniasolsandgelssynthesizedfromreversemicelles
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