| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Freire, Cristina
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (55/55 displayed)
- 2023Hybrids Composed of an Fe-Containing Wells–Dawson Polyoxometalate and Carbon Nanomaterials as Promising Electrocatalysts for the Oxygen Reduction Reactioncitations
- 2022Electrocatalytic Oxygen Reduction Reaction on 48-Tungsto-8-Phosphate Wheel Anchored on Carbon Nanomaterialscitations
- 2022Unveiling the structural transformations of the PW11Co@ZIF-67 nanocomposite induced by thermal treatmentcitations
- 2021Au/Ag nanoparticles-decorated TiO2 with enhanced catalytic activity for nitroarenes reductioncitations
- 2021Nanocomposites Prepared from Carbon Nanotubes and the Transition Metal Dichalcogenides WS2 and MoS2 via Surfactant-Assisted Dispersions as Electrocatalysts for Oxygen Reactionscitations
- 2021Carbon nanotube/graphene nanocomposites built via surfactant-mediated colloid assembly as metal-free catalysts for the oxygen reduction reactioncitations
- 2021Decorating MOF-74-derived nanocarbons with a sandwich-type polyoxometalate to enhance their OER activity: Exploring the underestimated bulk-deposition approachcitations
- 2020Advanced framework-modified POM@ZIF-67 nanocomposites as enhanced oxygen evolution reaction electrocatalystscitations
- 2020Metal Oxide (Co3O4 and Mn3O4) Impregnation into S, N-doped Graphene for Oxygen Reduction Reaction (ORR)citations
- 2020Oxygen Evolution Reaction Electrocatalytic Improvement in POM@ZIF Nanocomposites: A Bidirectional Synergistic Effectcitations
- 2019Electrocatalytic activity of new Mn3O4@oxidized graphene flakes nanocomposites toward oxygen reduction reactioncitations
- 2019Development of a disposable paper-based potentiometric immunosensor for real-time detection of a foodborne pathogencitations
- 2019Cu-based N-doped/undoped graphene nanocomposites as electrocatalysts for the oxygen reductioncitations
- 2018Co3O4 Nanoparticles Anchored on Selectively Oxidized Graphene Flakes as Bifunctional Electrocatalysts for Oxygen Reactionscitations
- 2018Polyoxotungstate@carbon nanocomposites as Oxygen Reduction Reaction (ORR) electrocatalystscitations
- 2018Polyoxometalate-graphene Electrocatalysts for the Hydrogen Evolution Reactioncitations
- 2017Multicolour Electrochromic Film Based on a TiO2@poly[Ni(salen)] Nanocomposite with Excellent Electrochemical Stabilitycitations
- 2017Graphene-poly(nickel complex) as novel electrochromic nanocomposite for the fabrication of a robust solid-state devicecitations
- 2017Highly Active Ruthenium Supported on Magnetically Recyclable Chitosan-Based Nanocatalyst for Nitroarenes Reductioncitations
- 2017Novel hybrid based on a poly[Ni(salen)] film and WO3 nanoparticles with electrochromic propertiescitations
- 2017PMo11V@N-CNT electrochemical properties and its application as electrochemical sensor for determination of acetaminophencitations
- 2017Multicolour Electrochromic Film Based on a TiO2@poly[Ni(sa/en)] Nanocomposite with Excellent Electrochemical Stabilitycitations
- 2017N-doped few-layered graphene-polyNi complex nanocomposite with excellent electrochromic propertiescitations
- 2016Phosphomolybdate@Carbon-Based Nanocomposites as Electrocatalysts for Oxygen Reduction Reactioncitations
- 2016High-Performance Electrochromic Devices Based on Poly[Ni(salen)]-Type Polymer Filmscitations
- 2015L-Serine functionalized clays: Preparation and characterizationcitations
- 2015Carbon Nanomaterial-Phosphomolybdate Composites for Oxidative Electrocatalysiscitations
- 2015MnFe2O4@CNT-N as novel electrochemical nanosensor for determination of caffeine, acetaminophen and ascorbic acidcitations
- 2015Biomolecules electrochemical sensing properties of a PMo11V@N-doped few layer graphene nanocompositecitations
- 2015Sucrose-derived activated carbons: electron transfer properties and application as oxygen reduction electrocatalystscitations
- 2015Biomolecules Electrochemical Sensing Properties of a PMo11V@N-Doped Few Layer Graphene Nanocompositecitations
- 2014Sensitive bi-enzymatic biosensor based on polyphenoloxidases-gold nanoparticles-chitosan hybrid film-graphene doped carbon paste electrode for carbamates detectioncitations
- 2014Novel electrochemical sensor based on N-doped carbon nanotubes and Fe3O4 nanoparticles: Simultaneous voltammetric determination of ascorbic acid, dopamine and uric acidcitations
- 2013Photocatalytic degradation of Reactive Black 5 with TiO2-coated magnetic nanoparticlescitations
- 2013Novel Composite Material Polyoxovanadate@MIL-101(Cr): A Highly Efficient Electrocatalyst for Ascorbic Acid Oxidationcitations
- 2013Alkene epoxidation by manganese(III) complexes immobilized onto nanostructured carbon CMK-3citations
- 2012Hybrid layer-by-layer films based on lanthanide-bridged silicotungstates and poly(ethylenimine)citations
- 2012Structural studies of lead lithium borate glasses doped with silver oxidecitations
- 2012Oxidovanadium(IV) acetylacetonate immobilized onto CMK-3 for heterogeneous epoxidation of geraniolcitations
- 2011[VO(acac)(2)] hybrid catalyst: from complex immobilization onto silica nanoparticles to catalytic application in the epoxidation of geraniolcitations
- 2011Modulating spectroelectrochemical properties of [Ni(salen)] polymeric films at molecular levelcitations
- 2011Epoxidation of olefins catalyzed by manganese(III) salen complexes grafted to porous heterostructured clayscitations
- 2010Superparamagnetic gamma-Fe(2)O(3)@SiO(2) nanoparticles: a novel support for the immobilization of [VO(acac)(2)]citations
- 2010Solid-State Electrochromic Cells Based on [M(salen)]-Derived Electroactive Polymer Filmscitations
- 2010Insights into electronic and structural properties of novel Pd(II) salen-type complexescitations
- 2010Templated synthesis of carbon materials mediated by porous clay heterostructurescitations
- 2010Structural and electrochemical characterisation of [Pd(salen)]-type conducting polymer filmscitations
- 2009Modulation of electroactive polymer film dynamics by metal ion complexation and redox switchingcitations
- 2008Electrocolorimetry of electrochromic materials on flexible ITO electrodescitations
- 2007Correlating structure and ion recognition properties of [Ni(salen)]-based polymer filmscitations
- 2006Amine-functionalised hexagonal mesoporous silica as support for copper(II) acetylacetonate catalystcitations
- 2006Covalent attachment of chiral manganese(III) salen complexes onto functionalised hexagonal mesoporous silica and application to the asymmetric epoxidation of alkenescitations
- 2005Asymmetric epoxidation of alkenes by a chiral manganese(III) salen complex anchored onto a functionalised hexagonal mesoporous silica
- 2002Oxidation of ferrocene derivatives at a poly[Ni(saltMe)] modified electrodecitations
- 2000Electrochemical and X-ray studies of nickel(II) Schiff base complexes derived from salicylaldehyde. Structural effects of bridge substituents on the stabilisation of the+3 oxidation statecitations
Places of action
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article
Au/Ag nanoparticles-decorated TiO2 with enhanced catalytic activity for nitroarenes reduction
Abstract
A straightforward and environmentally-friendly approach for the fabrication of TiO2 supported nano-Au and Ag catalysts with enhanced activity in nitroarenes reduction is presented. The immobilization of the metal nano-particles (NPs) onto TiO2 was performed through a first step of metal precursors adsorption (tetrachloroauric(III) acid trihydrate or silver(I) nitrate) onto TiO2, followed by a step of in situ metal cations reduction using three types of reducing agents: citric acid, NaBH4 and simulated sunlight irradiation. The type of reducing agent influenced the size, the oxidation state and loading of the grafted metal NPs. The Au-based nanocomposites contained Au NPs with sizes ranging between 19.3 and 28.2 nm and Au loadings in the range of 7.2-19.8 wt%. NaBH4 was the best reducing agent for the Au NPs immobilization onto TiO2, leading to the highest Au loading (19.8 wt%) and lowest Au+/Au-0 ratio (0.07). In the case of the Ag-based materials, citric acid revealed to be the best reducing agent for the Ag NPs immobilization onto TiO2, leading to ultrasmall grafted NPs, 10.1 wt% Ag loading and the highest amount of metallic silver (Ag+/Ag-0 ratio = 0.03). The catalytic performance of the Au/Ag-based TiO2 nanocomposites was evaluated in the reduction of 4-nitrophenol (4-NP) and 4-nitroaniline (4-NA) in aqueous medium, at room temperature, using NaBH4 as reducing agent (substrate:reducing agent:catalyst weight ratio = 0.007:1.89:1). The Au- and Ag-based nanocomposites (prepared with NaBH4 and citric acid, respectively) led to 100% conversion of 4-NP within 260 and 40 s, respectively, with rate constants (k) of 19.1 x 10(-3) and 94.2 x 10(-3) s(-1) (pseudo-first-order kinetics), respectively, demonstrating the higher performance of the Ag-based catalyst. In contrast, in the case of the 4-NA reduction, the highest catalytic performance was achieved for the Au-based material, promoting the total substrate conversion within 90 s (k = 29.4 x10(-3) s(-1)), while for the Ag-based catalyst the total 4-NA conversion was achieved within 120 s (k = 16.6 x10(-3) and 27.5 x10(-3) s(-1)). Both catalysts were reused in nine consecutive cycles in both 4-NP and 4-NA reduction, with the Au-based material presenting higher stability, especially for 4-NA reduction, with only a small reaction time increment.