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Listado de Artículos Publicados en 2015Los artículos están ordenados por el factor de impacto reflejado en el 'Journal Citation Reports 2013'.
- Copper-palladium core-shell as an anode in a multi-fuel membraneless nanofluidic fuel cell: Toward a new era of small energy conversion devicesMaya Cornejo, J., Ortiz Ortega, E., Álvarez Contreras, L. , Arjona, N., Guerra Balcázar, M. , Ledesma García, J., Arriaga, L.G
Chemical Communications 51, (2015), 2536-2539 F. I. 6.718A membraneless nanofluidic fuel cell with flow-through electrodes that works with several fuels (individually or mixed): methanol, ethanol, glycerol and ethylene-glycol in alkaline media is presented. For this application, an efficient Cu@Pd electrocatalyst was synthesized and tested, resulting outstanding performance until now reported, opening the possibility of power nano-devices for multi-uses purposes, regardless of fuel re-charge employed.
- Solution synthesized p -type copper gallium oxide nanoplates as hole transport layer for organic photovoltaic devicesWang, J., Ibarra, V., Barrera, D.a, Xu, L.a, Lee, Y.J., Hsu, J.W.P.
Journal of Physical Chemistry Letters 6, (2015), 1071-1075 F. I. 6.687p-Type metal-oxide hole transport layer (HTL) suppresses recombination at the anode and hence improves the organic photovoltaic (OPV) device performance. While NiOx has been shown to exhibit good HTL performance, very thin films (<10 nm) are needed due to its poor conductivity and high absorption. To overcome these limitations, we utilize CuGaO2, a p-type transparent conducting oxide, as HTL for OPV devices. Pure delafossite phase CuGaO2 nanoplates are synthesized via microwave-assisted hydrothermal reaction in a significantly shorter reaction time compared to via conventional heating. A thick CuGaO2 HTL (∼280 nm) in poly(3-hexylthiophene):[6,6]-phenyl-C61-butyric acid methyl ester (P3HT:PCBM) devices achieves 3.2% power conversion efficiency, on par with devices made with standard HTL materials. Such a thick CuGaO2 HTL is more compatible with large-area and high-volume printing process.
- Effective photoreduction of a nitroaromatic environmental endocrine disruptor by AgNPs functionalized on nanocrystalline TiO2Hernández Gordillo, A. , Obregón, S., Paraguay Delgado, F. , Rodríguez González, V.
RSC Advances 20, (2015), 15194-15197 F. I. 3.708Unprecedented photoactivity of silver nanoparticles photodeposited on nanocrystalline TiO2 for the efficient reduction of 4-nitrophenol at room temperature is reported. The use of Na2SO3 as a harmless scavenger agent for the reduction of a nitroaromatic endocrine disruptor yields a valuable 4-aminophenol reagent.
- A multisyringe flow-based system for kinetic-catalytic determination of cobalt(II)Chaparro, Laura ; Ferrer, Laura ; Leal, Luz ; Cerda, Víctor
Talanta 133, (2015), 94-99 F. I. 3.511A kinetic-catalytic method for cobalt determination based on the catalytic effect of cobalt(II) on the oxidative coupling of 1,2-dihydroxyanthraquinone (alizarin) was automated exploiting multisyringe flow injection analysis (MSFIA). The proposed method was performed at pH 9.2, resulting in a discoloration process in the presence of hydrogen peroxide. The fixed-time approach was employed for analytical signal measurement. The spectrophotometric detection was used exploiting a liquid waveguide capillary cell (LWCC), of 1 m optical length at 465 nm. The optimization was carried out by a multivariate approach, reaching critical values of 124 mu mol L-1 and 0.22 mol L-1 for alizarin and hydrogen peroxide, respectively, and 67 degrees C of reagent temperature. A sample volume of 150 mu L was used allowing a sampling rate of 30 h(-1). Under optimal conditions, calibration curve was linear in the range of 1-200 mu g L-1 Co, achieving a DL of 0.3 mu g L-1 Co. The repeatability, expressed as relative standard deviation (RSD) was lower than 1%. The proposed analytical procedure was applied to the determination of cobalt in cobalt gluconate and different forms of vitamin B-12, cyanocobalamin and hydroxicobalamin with successful results showing recoveries around 95%
- Automation of 99Tc extraction by LOV prior ICP-MS detection: Application to environmental samplesRogelio Rodríguez, Luz Leal, Silvia Miranda, Laura Ferrer, Jessica Avivar, Ariel García, Víctor Cerdà
Talanta 133, (2015), 88–93 F. I. 3.511A new, fast, automated and inexpensive sample pre-treatment method for 99Tc determination by inductively coupled plasma-mass spectrometry (ICP-MS) detection is presented. The miniaturized approach is based on a lab-on-valve (LOV) system, allowing automatic separation and preconcentration of 99Tc. Selectivity is provided by the solid phase extraction system used (TEVA resin) which retains selectively pertechnetate ion in diluted nitric acid solution. The proposed system has some advantages such as minimization of sample handling, reduction of reagents volume, improvement of intermediate precision and sample throughput, offering a significant decrease of both time and cost per analysis in comparison to other flow techniques and batch methods. The proposed LOV system has been successfully applied to different samples of environmental interest (water and soil) with satisfactory recoveries, between 94% and 98%. The detection limit (LOD) of the developed method is 0.005 ng. The high durability of the resin and its low amount (32 mg), its good intermediate precision (RSD 3.8%) and repeatability (RSD 2%) and its high extraction frequency (up to 5 h−1) makes this method an inexpensive, high precision and fast tool for monitoring 99Tc in environmental samples.