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Drying of SnO2 hydrogels: effect of the electrolyte
(1992-12-01)
The effect of the electrolyte (NH+ 4, Cl-) on the drying of SnO2 hydrogels was investigated by linear shrinkage, mass loss, gravimetric thermal analysis and infrared spectroscopy. Results show that the drying mechanism for ...
Oxygen related defects excitation and photoconductivity dependence of SnO2 sol-gel films with several light sources
(1999-12-01)
Since oxygen vacancies act as donors in SnO2, the electrical properties are related to deviation from stoichiometric composition. Depending on stoichiometry SnO2 can be highly insulating or may exhibit fairly high n-type ...
2-Mercaptoimidazole covalently bonded to a silica gel surface for the selective separation of mercury(II) from an aqueous solution
(Marcel Dekker Inc, 1997-01-01)
Silica gel with a specific surface area of 365 m(2).g(-1) and an average pore diameter of 60 Angstrom was chemically modified with 2-mercaptoimidazole. The degree of functionalization of the covalently attached molecule, ...
CHEMISORPTION OF SOME DIVALENT-CATIONS ON SILICA MODIFIED THROUGH THE REACTION OF PENTANE-2,4-DIONE WITH 3-PROPYLETHYLENEDIAMINE SILICA-GEL
(Elsevier Science BvAmsterdamHolanda, 1992)
Thermochemical investigation on the adsorption of some divalent cations on modified silicas obtained from sol-gel process
(Elsevier Science BvAmsterdamHolanda, 2000)
2-Mercaptoimidazole covalently bonded to a silica gel surface for the selective separation of mercury(II) from an aqueous solution
(Marcel Dekker IncNew York, 1997)
Estudo do efeito cicatrizante do gel de papaína a 2% em feridas cutâneas experimentais em equinos
(2012)
In order to study the healing power of papain gel 2% in skin wounds in horses, six adult animals were used. The wounds were caused experimentally with the help of a 2 cm punch on the left side lumbar area of the animals. ...
Sol-gel synthesis and characterization of Fe(2)O(3) center dot CeO(2) doped with Pr ceramic pigments
(Springer, 2008-07-01)
Undoped x center dot alpha-Fe(2)O(3) y center dot CeO(2) and doped with praseodymium ceramic pigments were obtained by the sol-gel method after heat treatment at 800 degrees C for 2 h. These pigments were characterized by ...
Pore size distribution of unsupported SnO2 membranes prepared by sol-gel process - Code: EP21
(1994-01-01)
Unsupported SnO2 membranes were prepared by sol-gel process and characterized by N2 adsorption-desorption isotherms and X-ray diffraction. Results show that the texture of dried samples does not change appreciably with the ...
Photoelectrochemical properties of sol-gel Nb2O5 films
(Kluwer Academic Publ, 1997-01-01)
Structural, optical, electro and photoelectrochemical properties of amorphous and crystalline sol-gel Nb2O5 coatings have been determined. The coatings are n-type semiconductor with indirect allowed transition and present ...