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Análisis de peloides de las Salinas de Chilca: Un estudio por espectroscopia mossbauer, difracción de rayos-x y fluorescencia de rayos-x del Fe-57
(Lima (Perú), 2004-08)
En el presente trabajo se reporta un estudio preliminar sobre la composición mineralógica y la identificación de las fases portadoras de hierro presentes en los peloides de una laguna ubicada en la provincia de Cañete, ...
Degradación fotocatalítica de fenol con nano-partículas de óxido de titanio soportadas en una matriz de polidimetil-siloxano
(Lima (Perú), 2004-08)
En este trabajo se reporta la fijación y actividad fotocatalítica de nano-partículas de óxido de titanio (TiO2) soportadas en polidimetil-siloxano (silicona). Las pastillas de TiO2 – silicona (polidimetil-siloxano) han ...
Characterization and butanol/ethanol sensing properties of mixed tungsten oxide and copper tungstate films obtained by spray-sol-gel
(Lima (Perú), 2003-07)
Mixed WO3 – CuWO4 films have been prepared from aqueous solution of copper sulfate and polytungsten gel with molar ratio Cu/W from 0 to 100 %. These solutions were sprayed onto alumina substrates at 220 ºC. The obtained ...
Efectos de la irradiación con neutrones térmicos sobre las propiedades eléctricas de los óxidos de tungsteno dopadas con boro para microbaterías: Reporte preliminar
(Lima (Perú), 2004-08)
Se presenta los resultados preliminares de la primera parte del trabajo relacionado con la obtención del Óxido de Tungsteno dopado con Litio para microbaterías. El material primario se obtuvo en el laboratorio de Físico-Química ...
Synthesis and characterization of rough electrochromic phosphotungstic acid films obtained by spray-gel process
(Lima (Perú), 2003-07)
Rough electrochromic phosphotungstic acid (PWA) films were fabricated by spraying a gel of phosphotungstate anions with a molar ratio of P:W = 1:12 onto glass substrates precoated with transparent and electrically conducting ...
The influence of the ethanol/water molar ratio in the precursor solution on morphology and photocatalytic activity of pyrolytic ZnO films
(Lima (Perú), 2005-08)
Zinc oxide films were fabricated by a home made spray pyrolysis system equipped with an optical set-up ensuring the in-situ control of the film growth. 0.1 M of zinc acetate diluted in a mixture of ethanol and water was ...
Highly porous thin films obtained by spray-gel technique
(Lima (Perú), 2004-08)
Combining the spray pyrolysis and the sol-gel techniques (spray-gel) gives the possibility to produce very rough and highly diffuse films, under appropriate conditions. This technique is suitable for producing multifunctional ...
Spray pyrolysis deposited zinc oxide films for photo-electrocatalytic degradation of methyl orange: influence of the pH
(Lima (Perú), 2003-07)
Zinc oxide films were made by spray pyrolysis equipped with an optical system for in-situ thickness measurement; zinc acetate water solution was used as spraying solution. The pH of the spraying solution was modified in ...
Ceramics from Villa El Salvador, a late formative site from the Central Coast of Perú
(Lima (Perú), 2007-08)
We applied a multielemental analytical method for characterization of archaeological ceramics from Villa El Salvador. The ceramics were characterize using Instrumental Neutron Activation Analyses (INAA), Energy-Dispersive ...
Highly porous tungsten-oxide-based films obtained by spray-gel for gas sensing applications
(Lima (Perú), 2005-08)
Highly porous mixed WO3–SnO2 films have been prepared from an aqueous solution of SnCl4.5H2O and polytungsten gel with a molar ratio of Sn/W from 0 to 1. These solutions were sprayed on to alumina substrates at 220 ºC. The ...