ListarDivisión de Nanociencias y Materiales por tema "QUÍMICA"
Mostrando ítems 61-80 de 98
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Photoanodes modified with reduced graphene oxide to enhance photoelectrocatalytic performance of B-TiO2 under visible light
(2015)"The effect of reduced graphene oxide (rGO) content in boron-modified TiO2 nanocrystalline films on their photocatalytic activity in phenol oxidation is investigated. Visible-light-active TiO2 modified photoanodes were ... -
Pine-tree-like morphologies of nitrogen-doped carbon nanotubes: Electron field emission enhancement
(2014)"Nitrogen-doped multiwalled carbon nanotube (CNT) bundles exhibiting pine-tree-like morphologies were synthesized on silicon-silicon oxide (Si/SiO2) substrates using a pressure-controlled chemical vapor deposition process. ... -
Practical mediated-assembly synthesis of silver nanowires using commercial Camellia sinensisextracts and their antibacterial properties
(2018)"Camellia sinensis is a well-known plant used for health purposes due to its high phenolic compound content and antioxidant properties. For the first time, the infusion of green tea has allowed the growth and stabilization ... -
Production of biodiesel from roasted chicken fat and methanol: free catalyst
(2014)"Transesterification reactions free of catalyst between roasted chicken fat with methanol were carried out in a batch reactor in order to produce biodiesel to temperatures from 120°C to 140°C. Parameters related to the ... -
Promotional effect of Rh nanoparticles on WO3/TiO2 titanate nanotube photocatalysts for boosted hydrogen production
(2018)"In this work, we explore the hydrogen production via the water splitting process on Rh-WO3 photocatalysts supported on nanotubes of TiO2. H2 production tests were performed in a 2-propanol-water solution. The support ... -
Pyrrolic nitrogen-doped multiwall carbon nanotubes using ball-milled slag-SiC mixtures as a catalyst by aerosol assisted chemical vapor deposition
(IOP Publishing, 2020)"We demonstrated that the ball-milled slag-SiC mixture is an effective catalyst to grow pyrrolic nitrogen-doped multiwall carbon nanotubes (N-MWCNTs) by aerosol assisted chemical vapor deposition (AACVD) method. N-MWCNTs ... -
Semiconducting Nanocrystalline Bismuth Oxychloride (BiOCl) for Photocatalytic Reduction of CO2
(MDPI, 2020)"The reduction of CO2 is relevant for the production of compounds as part of the carbon capture and utilization research approaches. Thus, photocatalytic reduction of CO2 over a tailored BiOCl-based photocatalyst (BTEG) ... -
Silver nanoparticles loaded on Cu-doped TiO2 for the effective reduction of nitro-aromatic contaminants
(2015)"The addition of Cu species via copper glycine complexes as a strategy for doping the TiO2 structure during the sol–gel process produces a copper–TiO2-based composite. The combination of the copper–TiO2-based composite ... -
Síntesis de carburos, sulfuros y boruros de renio y su evaluación en la producción de hidrógeno a partir de biomasa
(2019-10)"En esta tesis de doctorado se llevó a cabo la síntesis mecanoquímica de carburos (Re2C (2:1) y Re2C (1:1)), boruros (Re3B y ReB2) y sulfuros de renio (ReS2 (1:2) y ReS2 (2:7)). Estos materiales fueron caracterizados por ... -
Síntesis de materiales a base de renio y sus propiedades catalíticas en la producción de hidrógeno a partir de biomasa
(2015-02)"En este trabajo experimental se sintetizo la fase de carburo de renio (ReC640) y diboruro de renio (ReB640) por molienda mecánica a partir de mezclas de los elementos químicos constitutivos. La fase de Re2C fue obtenida ... -
Síntesis de nanopartículas de SiO2 como potenciales vehículos para administración de fármacos
(2015-11)"Uno de los principales problemas en el área de la salud es la baja eficiencia que presentan los sistemas de administración fármacos usados actualmente. Como resultado en los últimos años ha incrementado el interés en el ... -
Síntesis de nanopartículas metálicas y su aplicación en la reducción de 4-nitrofenol por un consorcio microbiano anaerobio
(2014-12)"Las nanopartículas metálicas de paladio pueden actuar como catalizadores y modificando los catalizadores con la adición de un segundo metal como el cobre aumentan el rendimiento de las reacciones. Para el tratamiento de ... -
Síntesis química de nanorods de Au asistida por iones de Ag+
(2015-12)"La preparación de nanopartículas metálicas, e.g., Au y Ag, tienen una importancia relevante en aplicaciones biomédicas y catalíticas, y el control en la forma y el tamaño son los objetivos buscados por muchos grupos de ... -
Síntesis y caracterización de polialquilendioxitiofenos por el método de oxidación química
(2015)"En este trabajo se realizó la síntesis y caracterización de algunos politiofenos conductores, específicamente los que presentan sustituyentes dialcoxi en su estructura denominados como polialquilendioxitiofenos, obteniendo ... -
Stabilisation of small mono- and bimetallic gold–silver nanoparticles using calix[8]arene derivatives
(Royal Society of Chemistry, 2018)"In this paper, we report the synthesis of octa(hydroxy)-octa(mercaptobutoxy)calix[8]arene and its use as a stabiliser of nanoparticles (NPs). We show that the reduction of gold and/or silver ions in the presence of this ... -
Structures and electronic properties of TinV (n = 1–16) clusters: first-principles calculations
(American Chemical Society, 2016)"Structures and electronic properties of TinV (n = 1–16) clusters have been investigated using density functional theory with the generalized gradient approximatio. The calculations have shown that the TinV clusters favor ... -
Study of the presence of spherical deformations on the Al top electrode due to electroforming in rewritable organic resistive memories
(Royal Society of Chemistry, 2017)"Physical deformations are observed at the top electrodes during the electroforming process in Al/PEDOT: PSS + nitrogen doped multiwalled carbon nanotube (N-MWCNTs)/Al rewritable resistive memory devices. These physical ... -
Surface modification of TiO2 with Ag nanoparticles and CuO nanoclusters for application in photocatalysis
(American Chemical Society, 2016)"Ag and CuO nanoparticles (NPs) synthesized on the surface of commercial TiO2 (P25) by radiolytic reduction were characterized by diffuse reflectance spectroscopy (DRS), transmission electron microscopy (TEM), high-angle ... -
Synthesis and characterization of GaN rods prepared by ammono-chemical vapor deposition
(2012-04)"GaN rods were deposited by chemical vapor deposition (CVD) onto sapphire (0 0 0 1) and amorphous quartz. The reactive Ga species in vapor the phase was formed with NH4Cl and gallium. The unidirectional growth was catalyzed ... -
Synthesis and Characterization of α-Al2O3/Ba-β-Al2O3 Spheres for Cadmium Ions Removal from Aqueous Solutions
(MDPI, 2022)"The search for adsorbent materials with a certain chemical inertness, mechanical resistance, and high adsorption capacity, as is the case with alumina, is carried out with structural or surface modifications with the ...