Listar por autor "Rodríguez, Juan"
Mostrando ítems 21-30 de 30
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Revista Tecnología & Desarrollo
Medina, Edgar; Mallaupoma, Mario; Prado, Antonio; Rodríguez, Juan; Espinoza, Marco; Sebastián, Carlos (LimaPE, 2009-01)Acceso abiertoRevista de divulgación científica del IPEN. -
Síntesis de nanovarillas de ZnO y su aplicación en la desinfección fotocatalítica del agua
Alarcón, Julio; Paraguay, Francisco; López, Alcides; Rodríguez, Juan (Lima (Perú)PE, 2008-11)Acceso abiertoSe han sintetizado varillas de ZnO con dimensiones transversales y longitudinales en la escala manométrica y micrométrica respectivamente. Estas nanovarillas se hicieron crecer sobre sustratos de vidrio usando el siguiente ... -
Síntesis y caracterización de microfibras de TiO2/PVA y Acetato de Zinc/PVA fabricados por la técnica de electrogirado
Egoavil, Ricardo; López, Alcides; Rodríguez, Juan (Lima (Perú)PE, 2008-11)Acceso abiertoEl propósito de este trabajo es estudiar las condiciones de síntesis para la obtención de materiales en forma de fibras, compuestos de semiconductores en una matriz polimérica y fabricados por la técnica de “Electrogirado”. ... -
Solar photocatalytic degradation of phenol using pyrolitic TiO2 films deposited inside a tubing
Rodríguez, Juan; Díaz, José; Ponce, Silvia; Solís, José; Estrada, Walter (Lima (Perú)PE, 2005-08)Acceso abiertoSolar photocatalytic degradation of phenol was obtained using TiO2 films deposited inside glass tubing. TiO2 thin films inside tubing were obtained by spray-gel technique using a titanium isopropoxide solution conveniently ... -
Solar water disinfection studies with supported TiO2 and polymer-supported Ru(II) sensitizer in a compound parabolic collector
Rodríguez, Juan; Jorge, Clido; Zúñiga, Patricia; Palomino, Javier; Zanabria, Pedro; Solís, José; Estrada, Walter (Lima (Perú)PE, 2008-11)Acceso abiertoSolar water disinfection was performed by using TiO2 and Ru(II) complex as fixed catalysts implemented in a compound parabolic collector (CPC) photoreactor. Studies were performed in the laboratory as well as at a greenfield ... -
Spray pyrolysis deposited zinc oxide films for photo-electrocatalytic degradation of methyl orange: influence of the pH
Quintana, M.; Ricra, E.; Rodríguez, Juan; Estrada, Walter (Lima (Perú)PE, 2003-07)Acceso abiertoZinc 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 ... -
Surface morphology engineering of metal-oxide films by chemical spray pyrolysis
Rodríguez, Juan; Solís, José; Gómez, Mónica; Estrada, Walter (Lima (Perú)PE, 2007-08)Acceso abiertoChemical Spray Pyrolysis Technique and a combination of sol-gel and spray pyrolysis techniques have been used in order to monitor the morphology of metal-oxide-based thin films to be used as functional materials. We can ... -
Synthesis and characterization of rough electrochromic phosphotungstic acid films obtained by spray-gel process
Medina, A.; Solís, José; Rodríguez, Juan; Estrada, Walter (Lima (Perú)PE, 2003-07)Acceso abiertoRough 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
Quintana, María; Rodríguez, Juan; Solís, José; Estrada, Walter (Lima (Perú)PE, 2005-08)Acceso abiertoZinc 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 ... -
Titanium dioxide nanoparticles obtained by sol gel method: Effect of the catalyst acids
Quintana, María; Rodríguez, Juan; Solís, José; Candal, Roberto; Estrada, Walter (Instituto Peruano de Energía NuclearPE, 2010-11)Acceso abiertoTitanium dioxide nanoparticles have been obtained by sol-gel process. Titanium isopropoxide was hydrolized in acidic medium at pH values between 0.5 and 1. The hydrolysis was catalyzed with HCl, HNO3 or HClO4, and studied ...