Listar por autor "b0f49e94494cfd0b31d200ab57002927"
Mostrando ítems 1-10 de 10
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Effect of Calcination Temperature on the Behavior of the Agglomerated Co3O4 Nanoparticles Obtained Through the Sol–Gel Method
Raba, Angela; Cardenas-Flechas, L. J.; Barba-Ortega, J.; Rincón Joya, Miryam; Moreno-Aldana, Luis Carlos (Journal of Inorganic and Organometallic Polymers and MaterialsWashintong D.C , Estados Unidos, 2020-07-31)gglomerates of Co3O4 were obtained using the sol–gel method for the synthesis with subsequent calcination of the samples up to 550 °C. Through X-rays it was observed that the samples presented the pure spinel phase with a ... -
Effect of tungsten doping on the structural, morphological and bactericidal properties of nanostructured CuO
Raba, Angela; Malafatti, João Otávio Donizette; Parra-Vargas, Carlos Arturo; Paris, Elaine Cristina; Rincón Joya, Miryam (PLOS ONEWashintong D.C , Estados Unidos, 2020-09-28)Copper oxide (CuO) has been broadly used in different technological and biological applications. However, based on the literature review, there are few reports describing the synthesis of tungsten doped copper oxide and ... -
Effects of metal doping agent on the properties of Nb2−xMxO5 (M = Mn, Fe, and Ni) system
Raba, Angela; Barba, Jose; Rincón Joya, Miryam (International Journal Of Applied Ceramic TechnologyBogota , Colombia, 2018-05-21)In order to improve the behavior Niobium pentoxide on oxidation-reductionreactions to degrade organic compounds in aqueous solutions, we developed the synthesis of Niobium pentoxide with the metal doping agents: manganese,iron, ... -
Influence of the H2O content and the time on the formation of nanostructures in a chemical solution of H2O/HF/NH4F/EG
Raba, Angela; Bautista-Ruiz, Jorge; Rincón Joya, Miryam (Journal of Physics: Conference Series, 2018-12-07)The influence of anodizing time on the length, morphology and photoelectrochem-ical properties of TiO2 Nanotubes has been investigated. An optimum anodizing time of 20 min at 20V leads to 220nm long of the nanotubes. By ... -
Mn-modification effects on Nb2O5 structural, optical and vibrational properties
Raba, Angela; Murillo, Edwin A.; Rincón Joya, Miryam (Journal of Physics: Conference SeriesWashintong D.C , Estados Unidos, 2017-12-29)In this study Mn-modification (at 1%, 2.5%, 5% and 10%) on Nb2O5 was carried out through the Pechini method; the annealing temperatures: 400°C, 500°C, 600°C and 700°C, were used to study the thermal stability of the system ... -
Niobium Pentoxide Samples with Addition of Manganese at Different Concentrations and Calcination Temperatures Applied in the Photocatalytic Degradation of Rhodamine B
Raba, Angela; Falcony, Ciro; Supelano, Ivan; Rincón Joya, Miryam (Applied SciencesBerna , Suiza, 2020-06-21)In order to improve the photocatalytic effect of Nb2O5, manganese from 1% to 10% was added by the polymeric precursor’s method. The samples obtained were subjected to different calcination temperatures from 400 to 700 °C. ... -
Quicklime as an alternative in the photodegradation of contaminants
Raba, Angela; Bautista-Ruiz, Jorge; Rincón Joya, Miryam (Journal of Physics: Conference SeriesBogota ,Colombia, 2016-02-12)Chemical oxidation is one of the many different methods of removing contaminants that has emerged recently, is an alternative method to traditional techniques. According to this research calcium peroxide is suitable choice ... -
Synthesis and characterization of the oxide nanoparticles obtained by the polymeric precursor method
Murillo, Edwin A.; Raba, Angela; Bautista-Ruiz, Jorge (Journal of Physics: Conference SeriesBerlin , Alemania, 2016-02-12)Niobium pentoxide (Nb2O5) nanoparticles were prepared by the polymeric precursor method using citric acid as a chelating agent and ethylene glycol as a polymerizing agent. The powders obtained were characterized by X-ray ... -
Synthesis and Structural Properties of Niobium Pentoxide Powders: A Comparative Study of the Growth Process
Raba, Angela; Rincón Joya, Miryam; Bautista-Ruiz, Jorge (Materials ResearchBrasilia , Brasil, 2016-10-10)Powders Nb2 O5 were prepared by two different synthesis method, Sol-Gel and polymeric precursors (Pechini). In the Pechini method before adding the citric acid in the process, four different solutions were used to get the ... -
Vibrational Raman modes and particle size analysis of cupric oxide with calcination temperature
Raba, Angela; Rincón Joya, Miryam; Barba, Jose (Indian Journal Of Pure '&' Applied PhysicsNueva Delhi , India, 2019)In this work a study of the effect of the synthesis conditions on the vibratory and particle size properties in the cupric oxide (CuO) has been presented. The synthesis has been carried out by the polymeric precursor method ...