Publicaciones en Revistas arbitradas e indexadas
Permanent URI for this collectionhttps://saber.unimet.edu.ve/handle/20.500.14516/434
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Browsing Publicaciones en Revistas arbitradas e indexadas by Author "Borrás, Carlos"
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Item A novel nickel nanowire amperometric sensor: Direct current vs. alternating current strategies for ethanol, acetaldehyde and acetylcholine detection(2015) Blanco, Sergio; Vargas, Ronald; Mostany, Jorge; Borrás, Carlos; Scharifker, Benjamín; Gerencia Tecnológica y/o Tecnología; Departamento de Química; Facultad de CienciasItem A rotating disk study of the photocatalytic oxidation of p-nitrophenol on phosphorous-modified TiO2 photocatalyst(2015) Méndez, Daniel; Vargas, Ronald; Borrás, Carlos; Blanco, Sergio; Mostany, Jorge; Scharifker, Benjamín; Gerencia Tecnológica y/o Tecnología; Departamento de Química; Facultad de CienciasAfter discussing the general aspects of photocatalytic oxidation of organic compounds in aqueous solutions and the application of the rotating disk theory to (photo)catalytic phenomena, we report the oxidation of p-nitrophenol (PNP) on illuminated phosphorus modified TiO2 (P-TiO2) and TiO2 photocatalysts under controlled hydrodynamic conditions. We found that the performance of the oxygen transfer reaction can be described considering mass transport in solution and surface reaction according to Langmuir–Hinshelwood kinetics. From analysis of the dependence of the reaction rate on the rotation rate, we obtained the apparent organic–photocatalyst adduct interaction constant K, the rate constant k of the surface reaction between adsorbed PNP and hydroxyl radicals, and the diffusion coefficient D of PNP in solution. The results showed that degradation of PNP using P-TiO2 and UV light was readily possible, with reaction half-lives significantly lower than those obtained using pristine TiO2 photocatalyst.Item Current transient study of the kinetics of nucleation and diffusion-controlled growth of bimetallic phases(2013) Díaz, Oscar; Mostany, Jorge; Borrás, Carlos; Scharifker, Benjamín; Gerencia Tecnológica y/o Tecnología; Departamento de Química; Facultad de CienciasItem Electrochemical oxygen transfer reactions: Electrode materials, surface processes, kinetic models, linear free energy correlations and perspectives(2016) Vargas, Ronald; Borrás, Carlos; Méndez, Daniel; Mostany, Jorge; Scharifker, Benjamín; Gerencia Tecnológica y/o Tecnología; Departamento de Química; Facultad de CienciasItem Fotoelectroxidación de compuestos orgánicos con adsorción fuerte sobre TiO2: Formulación de un modelo cinético(2016) Carvajal, David; Vargas, Ronald; Borrás, Carlos; Mostany, Jorge; Scharifker, Benjamín; Gerencia Tecnológica y/o Tecnología; Departamento de Química; Facultad de Ciencias