Now showing items 31-40 of 157
Ecofriendly liquid phase oxidation with hydrogen peroxide of 2,6-dimethylphenol to 2,6-dimethyl-1,4-benzoquinone catalyzed by TiO2-CeO2 mixed xerogels
(Elsevier Science, 2009-03-03)
Titania–ceria mixed xerogels were prepared with 10% (w/w) CeO2 and different pH values during the sol–gel process. The gels were dried in air and calcined at different temperature. Moreover, a sample without cerium, 100% ...
CATALIZADORES Ru/SiO2 y Ru/Al2O3 PREPARADOS POR SOL-GEL PARA HIDROGENACION DE TOLUENO
(Sociedad Chilena de Química, 2000)
Structural Characterization of Nanocrystalline Sb-Doped SnO2 Xerogels by Multiedge X-ray Absorption Spectroscopy
(Amer Chemical Soc, 2010-11-18)
Multiedge XAS data are presented for Sb-doped SnO2 xerogels dried at 200 degrees C and fired at 550 degrees C, aiming to determine the location of antimony doping in the host matrix and then to understand the role that the ...
Study of Hybrid Silica-Polyethyleneglycol Xerogels by Eu3+ Luminescence Spectroscopy
Good optical quality Eu3+-doped silica-polyethyleneglycol hybrids were prepared by the sol-gel process. Thermomechanical analysis showed an increase of the glass transition temperature, due to the stiffness of the polymeric ...
Aluminoxane-epoxi-siloxane hybrids waveguides
(Elsevier B.V., 2008-11-01)
Boehmite-GPTS (GKS-glycidoxypropyltrimethoxysilane) hybrids (BGS) have been prepared by the sol-gel methodology. Spectroscopic properties and structural features have been evaluated from the initial sols to xerogels as a ...
Magnetic resonance study of a vanadium pentoxide gel
In this work we report results from continuous-wave (CW) and pulsed electron paramagnetic resonance (EPR) and proton nuclear magnetic resonance (NMR) studies of the vanadium pentoxide xerogel V2O5:nH(2)O (n approximate to ...
Random laser emission from a Rhodamine B-doped GPTS/TEOS-derived organic/silica monolithic xerogel
A Rhodamine B-doped 3-glycidoxypropyltrimethoxysilane (GPTS)/tetraethyl orthosilicate (TEOS)-derived organic/silica monolithic xerogel with excellent optical properties was prepared and its potential as a random laser host ...