El agua es un recurso esencial para la vida y su calidad crucial salud humana ambiental. En este estudio sepresenta el diseño de electrodos aplicación a base nanotubos carbono magnéticos degradación denaranja metilo cloranfenicol disueltos en mediante proceso electro-Fenton. Para llevarlo cabo sesintetizaron deposición química vapor, seguidos funcionalización mejorar sudispersión agua, añadiendo grupos carboxílicos oxidación química. Los funcionalizados sehidrataron con sulfato férrico 1 M...

Abstract In this work, we report the preparation of TiO 2 nanoparticles with a high surface area, from 120 to 168 m g −1 by hydrothermal-microemulsion route and hydrothermal temperature effect over particle size, porosity, photovoltaic parameter. The samples were characterized Raman, BET, TEM, SEM-FE, I–V curves, EIS. increase correlates pore size. Although when synthesis was 250 °C, area presents an unexpected decrease c.a. 28%. employed as thin-film photo-anodes for dye-sensitized solar...

AgBiS2 is a promising and environmentally friendly absorber material for use in hybrid solar cells (HSC). Here, we report study on the evolution of interfacial phenomena observed during deposition onto mesoporous TiO2 by two-stage successive ionic layer adsorption-reaction method. With this approach, inorganic–organic HSC were assembled using Co2+ doped P3HT as hole transport layer. Surface photovoltage spectroscopy contact potential difference measurements corroborated low density trap...

Abstract The chemistry of the different components turpentine and effect temperature on synthesis multi-walled carbon nanotubes (MWCNTs) by spray pyrolysis using ferrocene as catalyst in a range 700–1000°C at 100°C intervals was investigated. Turpentine with high α-pinene concentration (83.4%) low β-pinene (8.22%), well pure β-pinene, were used sources. MWCNTs analyzed scanning electron microscopy, transmission Raman spectroscopy, X-ray diffraction thermogravimetrical analysis. When...

This study reports the synthesis of thin polymeric films by layer-by-layer deposition and covalent cross-linking polyvinyl dimethylazlactone polyethylene imine, which were functionalized with lauric (12-C), myristic (14-C), palmitic (16-C) saturated fatty acids, whose high levels in bloodstream are correlated insulin resistance potential development type 2 diabetes mellitus. Aiming to assess effect acids on adhesion proliferation Langerhans β-cells, all prepared (35 35.5 bilayers without...

Electron lifetime and photoelectrochemical performance of carbon-doped TiO2 electrodes are presented. Thin films random disposed ribbon-like structures C-doped were applied onto FTO substrates using spray dip-coating techniques. The fabricated show photocurrent enhancement 20 times greater than compact electrode, electron lifetimes 2 orders magnitude lower films. Enhancement in suggests a beneficial role C-doping which compensates the transport properties expected to deteriorate disordered...

In this work, PtPd hybrid cathodic catalysts were prepared for a proton exchange membrane fuel cell (PEMFC) application by two different strategies. The first strategy was the physical mixing of bimetallic onto partially reduced graphene oxide (PtPd/rGO) and multi-walled carbon nanotubes (PtPd/MWCNT); + (PtPd/MWCNT). second both carbonaceous supports before deposition to form PtPd/(rGO:MWCNT). Our experimental results revealed that nanomaterial over mixture had better oxygen reduction...

In this work the preparation of dense composite membranes, from blends poly(vinylidene fluoride) (PVDF), poly(ether sulfone) (PES) and Nafion® 117, with possible applications in vanadium reduction flow battery is reported. The 117 membranes where prepared by phase inversion method controlled air atmosphere, were characterized to determine their potential for use energy conversion devices, as a lower cost alternative commercial membrane. effect thickness on its morphological cation exchange...

In this work, the preparation of dense blended membranes, from blends poly(vinylidene fluoride) (PVDF), poly(ether sulfone) (PES) and polyethyleneimine (PEI) or Fumion®, with possible applications in alkaline fuel cell (AEMFC) is reported. The PEI/Fumion® membranes were prepared under a controlled air atmosphere by solvent evaporation method, characterized regarding water uptake, swelling ratio, thermogravimetric analysis (TGA), infrared spectroscopy (FT-IR), scanning electron microscopy...

Abstract Anion exchange ionomer (AEI) is a critical component used on anion membrane fuel cell (AEMFC) and alkaline water electrolyzer (AWE). In this work, quaternized polysulfone with different functionalization degree were as an to evaluate the performance in oxygen reduction reaction (ORR) hydrogen oxidation (HOR), both implied operation of AEMFC AWE. The synthesized exhibited better reactions comparison commercial AEI Aemion®. PSf‐130 performance, since IEC surface area increases twice...

In this paper, we reported the synthesis of Co and Cu nanoparticles (NPs) supported on partially reduced graphene oxide (M/rGO), with incorporation spacers as multi-walled carbon nanotubes (MWCNT) black (CB) among interlayers to generate nanocomposites. The oxygen reduction reaction (ORR) polarization curves show that use MWCNT spacer improves current density up 6.9 times for NPs 3.5 materials. Also, charge transfer resistance decreases using CB: 950 68 All carbon-nanocomposites present...

TiO 2 nanowire arrays (TNA) play an important role on the development of photocatalysis, photovoltaics, and sensors systems. The morphology superficial area TNA can be modified by thermal processing inducing changes in recombination dynamics inside 1D matrix, at /electrolyte interface. Our data indicates that for paths involving reactions with redox pair, electron lifetime is order milliseconds, whereas electron-hole gives lifetimes microseconds, both increase annealing temperature.

Abstract In this work new naphthalenediimides (NDIs) were synthesized and used as dyes in DSSC. The efficiency ( η ) of the DSSC is influenced by NDIs electronic structural characteristics. It was found a better cell performance with which have broader absorption band shifted to red color, high ƹ values, more adsorption anode surface. gaps determinate UV–vis cyclic voltammetry. LUMO orbitals most are above conduction (CB) energy for TiO 2 allowing electron transfer process from NDI...

The development of high rate capability electrodes for Li-ion batteries is a priority topic in order to diversify the applicability this dispositive. High capacity materials usually fail when charge-discharge cycle carried out at rates, due scarce electronic conductivity, volume expansion, low diffusion coefficient solid, among others [1-3]. Composites with superior properties than its raw can be achieved by bringing together best each component enhance functionality. Particularly, matrixes...

Recently, quantum dot-sensitized solar cells (QDSSC) have attracted much attention because they high absorption coefficients when compared with conventional organic dye-type cells. In this work, we investigated the sensitization of solvothermal nanowires and thermally treated MWCNT-TiO 2 coreshell structures PbS QDs. ZnS passivation was also implemented by successive ionic layer adsorption reaction (SILAR) method using 3 cycles. Besides absorbance spectrum these materials, report carrier’s...

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