Electrochemical study of Meldola's blue, methylene blue and toluidine blue immobilized on a SiO 2 /Sb 2 O3 binary oxide matrix obtained by the sol-gel processing method

2003 ◽  
Vol 7 (10) ◽  
pp. 665-670 ◽  
Author(s):  
E. S. Ribeiro ◽  
S. S. Rosatto ◽  
Y. Gushikem ◽  
L. T. Kubota
Keyword(s):  
Methylene Blue ◽  
Toluidine Blue ◽  
Sol Gel ◽  
Binary Oxide ◽  
Processing Method ◽  
Electrochemical Study ◽  
Oxide Matrix ◽  
Gel Processing ◽  
Meldola's Blue ◽  
Blue Methylene

scholarly journals The Li+, Na+ and K+ ion exchange reaction process on the surface of mixed oxide SiO2/TiO2/Sb2O5 surface prepared by the sol-gel processing method

2005 ◽  
Vol 30 (1) ◽  
pp. 51-58 ◽  
Author(s):  
C. U. Ferreira ◽  
J. E. Gonçalves ◽  
Y. V. Kholin ◽  
Y. Gushikem
Keyword(s):  
Ion Exchange ◽  
Mixed Oxide ◽  
Exchange Process ◽  
Sol Gel ◽  
Exchange Capacity ◽  
Processing Method ◽  
Exchange Property ◽  
Ion Exchange Process ◽  
Ion Exchange Reaction ◽  
Gel Processing

The porous mixed oxide SiO2/TiO2/Sb2O5 obtained by the sol-gel processing method presented a good ion exchange property and a high exchange capacity towards the Li+, Na+ and K+ ions. In the H+/M+ ion exchange process, the H+ / Na+ could be described as presenting an ideal character. The ion exchange equilibria of Li+ and K+ were quantitatively described with the help of the model of fixed tetradentate centers. The results of simulation evidence that for the H+ / Li+ exchange the usual situation takes place: the affinity of the material to the Li+ ions is decreased with increasing the degree of ion exchange. On the contrary, for K+ the effects of positive cooperativity, that facilitate the H+ / K+ exchange, were revealed.

Local order structure and surface acidity properties of a Nb2O5/SiO2 mixed oxide prepared by the sol–gel processing method

2004 ◽  
Vol 177 (7) ◽  
pp. 2432-2439 ◽  
Author(s):  
Maria Suzana P Francisco ◽  
Richard Landers ◽  
Yoshitaka Gushikem
Keyword(s):  
Mixed Oxide ◽  
Surface Acidity ◽  
Sol Gel ◽  
Processing Method ◽  
Local Order ◽  
Order Structure ◽  
Gel Processing

Synthesis of Nano-Sized SrTiO3 Photocatalyst by Sol-Gel Method

2012 ◽  
Vol 512-515 ◽  
pp. 1673-1676 ◽  
Author(s):  
Wei Zhao ◽  
Jian Jun Yao ◽  
Jing Ya ◽  
Lei E ◽  
Zhi Feng Liu ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Methylene Blue ◽  
Perovskite Phase ◽  
Sol Gel ◽  
Complexing Agent ◽  
Strontium Nitrate ◽  
X Ray Diffraction ◽  
X Ray ◽  
Ph Values ◽  
Gel Processing

A sol-gel processing technology was employed to synthesize fine SrTiO3 powder by using strontium nitrate (Sr(NO3)2) , butyl titanate (Ti(OC4H9)4) as precursors, citric acid (C6H8O6) as complexing agent and (ethylene) glycol (C2H6O2) as stabilizer. Prepared the precursors in liquid phase and then calcined the precursors to achieve nano-sized SrTiO3 powders. The microstructure and composition of the as-synthesized samples were characterized by X-ray diffraction (XRD), Scan Electron Microscopy (SEM), and the photocatalytic activity was studied. The results showed that all the SrTiO3 particles were identified as perovskite phase. The pH values, the content of the acetic acid, the heat treat temperature play important roles on the synthesis of the SrTiO3 photocatalyst. When the pH=1, n(Sr(NO3)2 ) : n(Ti(OC4H9)4) = 1 : 1, n(Sr(NO3)2 ) : n(C6H8O6)=1:1.7, the product has better rate of photodegradation for the Methylene Blue under the ultraviolet condition.

Preparation of alumina gels by a non-hydrolytic sol-gel processing method

1994 ◽  
Vol 170 (3) ◽  
pp. 234-242 ◽  
Author(s):  
S. Acosta ◽  
R.J.P. Corriu ◽  
D. Leclercq ◽  
P. Lefèvre ◽  
P.H. Mutin ◽  
...  
Keyword(s):  
Sol Gel ◽  
Processing Method ◽  
Alumina Gels ◽  
Gel Processing

Novel route for the epitaxial growth of (SrBa)Nb2O6 thick films by the sol-gel method using a self-template layer

2001 ◽  
Vol 16 (11) ◽  
pp. 3179-3183 ◽  
Author(s):  
A-D. Li ◽  
C. L. Mak ◽  
K. H. Wong ◽  
D. Wu ◽  
Naiben Ming
Keyword(s):  
Sol Gel ◽  
Pulsed Laser ◽  
Processing Method ◽  
Laser Deposition ◽  
Morphological Properties ◽  
Promising Technique ◽  
High Quality ◽  
Homoepitaxial Growth ◽  
Device Applications ◽  
Gel Processing

A novel sol-gel processing method has been developed to fabricate epitaxial (SrBa)Nb2O6 (SBN) thin films on MgO substrates. It involves the introduction of a SBN self-template layer on MgO by pulsed laser deposition (PLD). Effects of the SBN self-template layer on the structural and morphological properties of the sol-gel-derived SBN films were investigated. Compared to the sol-gel-derived SBN films without a self-template layer, our new technique produces SBN films of excellent epitaxy and more dense grains with uniform distribution. This can be explained by the self-template-layer-induced homoepitaxial growth. The innovative processing method with combination of PLD and sol-gel is a promising technique in preparing high-quality, thick epitaxial SBN films for electro-optics device applications.

scholarly journals Adsorption of hidrogen peroxide on the surface of silica - titania mixed oxide obtained by the sol-gel processing method

2007 ◽  
Vol 32 (2) ◽  
pp. 41-45 ◽  
Author(s):  
J. E. Gonçalves ◽  
U.P. R. Filho ◽  
D.W. Franco ◽  
Y. Gushikem
Keyword(s):  
Mixed Oxide ◽  
Sol Gel ◽  
Processing Method ◽  
Gel Processing
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