A5068341519- Supercapacitor Materials and Fabrication
- Conducting polymers and applications
- Polyoxometalates: Synthesis and Applications
- Advanced Sensor and Energy Harvesting Materials
- Mesoporous Materials and Catalysis
- Nanomaterials for catalytic reactions
- Advanced biosensing and bioanalysis techniques
- Photochromic and Fluorescence Chemistry
- Iron oxide chemistry and applications
- Vanadium and Halogenation Chemistry
- Advanced Photocatalysis Techniques
- Biosensors and Analytical Detection
- Catalytic Processes in Materials Science
- Porphyrin and Phthalocyanine Chemistry
- Advanced Thermoelectric Materials and Devices
- Magnetic Properties and Synthesis of Ferrites
- Electrocatalysts for Energy Conversion
- Nanoparticle-Based Drug Delivery
- Nanocluster Synthesis and Applications
- Catalysis and Oxidation Reactions
- CRISPR and Genetic Engineering
- Ocular Surface and Contact Lens
- Multiferroics and related materials
- Advanced Nanomaterials in Catalysis
- TiO2 Photocatalysis and Solar Cells
Universidade do Porto
2015-2024
Rede de Química e Tecnologia
2014-2024
Polytechnic Institute of Porto
2023
Faculdade de Tecnologia e Ciências
2014-2021
Universidade Fundação Mineira de Educação e Cultura
2020
University of Minho
2014
Superparamagnetic ferrite nanoparticles (MFe2O4, where M = Fe, Co, Mn) were synthesized through a novel one-step aqueous coprecipitation method based on the use of new type alkaline agent: alkanolamines isopropanolamine and diisopropanolamine. The role played by bases particles' size, chemical composition, magnetic properties was investigated compared directly with effect traditional inorganic base NaOH. MFe2O4 nanomaterials exhibited high colloidal stability, particle sizes in range 4–12...
This work reports the synthesis and characterization of mesoporous silica nanoparticles (MSNs) functionalized with tridecafluorooctyltriethoxysilane (F13) their in situ incorporation onto cotton textiles. The hybrid MSNs functional textiles were prepared by a one-pot co-condensation methodology between tetraethylorthosilicate (TEOS) F13, hexadecyltrimethylammonium chloride (CTAC) as template triethanolamine base. influence F13 to TEOS molar ratio (1:10, 1:5 1:3) on nanoparticle morphology,...
This work reports a detailed investigation about the physicochemical properties of superparamagnetic γ-Fe2O3 nanomaterial synthesized by co-precipitation method and coated with two silica shells, its application as support for immobilization oxovanadium(IV) acetylacetonate ([VO(acac)2]). The influence coatings on surface composition interactions core-shell nanocomposites is discussed based combination several techniques: electron microscopy techniques (SEM TEM EDS), DLS, powder XRD, XPS,...
Photochromic silica nanoparticles (SiO2@NPT), fabricated through the covalent immobilization of silylated naphthopyrans (NPTs) based on 2H-naphtho[1,2-b]pyran (S1, S2) and 3H-naphtho[2,1-b]pyran (S3, S4) or direct adsorption parent (1, 3) onto (SiO2 NPs), were successfully incorporated cotton fabrics by a screen-printing process. Two aqueous acrylic- (AC-) polyurethane- (PU-) inks used as dispersing media. All textiles exhibited reversible photochromism under UV solar irradiation, developing...
Magnetic core-double shell silica nanosupports functionalized with amine and thiol groups successfully immobilized Au NPs, producing novel magnetically recyclable nanocatalysts for the reduction of 4-nitrophenol in water presence NaBH<sub>4</sub>.
Co<sub>x</sub>Mn<sub>1-x</sub>Fe<sub>2</sub>O<sub>4</sub> nanoferrites with tailored size and magnetism were produced by one-pot coprecipitation. Selection of Co(II):Mn(II) ratio alkaline agent allows precise control the material properties.
Several routes have been developed to prepare magnetic core–shell Fe3O4@Au nanoparticles (MNPs). However, only highly monodisperse MNPs are suitable for analytical applications. Herein, we describe the detection of GMO through use gold-coated with fine-tuned properties as platforms. The were prepared a procedure that involves preparation Fe3O4 cores by thermal decomposition and their coating reduction gold precursor. Different Fe3O4:Au precursor molar ratios (1:1; 1:4; 1:7) tested on...
Inorganic–polymer composites have become promising materials to be processed by printing technologies because of their unique properties that allow the fabrication flexible wearable electronics at reduced manufacturing costs. In present work, a complete methodological process assembling microthermoelectric generator based on inorganic−polymer is presented. The used microparticles were prepared top-down approach beginning with previously material solid-state reaction and later scaled down...
This work reports the preparation of a novel hybrid nanocatalyst through immobilization oxidovanadiumIV acetylacetonate ([VO(acac)2]) onto silica nanoparticles functionalized with 3-aminopropyltriethoxysilane (APTES) and its catalytic application in allylic epoxidation geraniol. All nanomaterials were characterized by chemical analysis, X-ray photoelectron spectroscopy (XPS) Fourier transform infrared (FTIR). The parent amine-functionalized also analyzed 29Si 13C solid-state nuclear magnetic...
This work reports the mastered design of novel water-dispersible superparamagnetic iron oxide nanomaterials with enhanced magnetic properties and reduced size. A straightforward cost-effective aqueous coprecipitation route was developed, based on use three new agents: polydentate bases diethanolamine, triethanolamine triisopropanolamine. Through selection these alkanolamines which presented different complexing properties, an improvement surface spin order could be achieved upon reduction...
Abstract A Ru supported on a magnetically separable chitosan‐based nanomaterial (Mn@CS@Ru) was prepared by wet impregnation based ionic gelation using sodium tripolyphosphate as cross‐linking agent. The of chitosan leads to supporting matrix promote the embedding manganese(II) ferrite and nanoparticles (NPs) electrostatic interactions. effects formulation method parameters fabrication process were investigated, resulting as‐prepared Mn@CS@Ru nanocatalyst characterized. catalytic activity...
This study describes nanocomposites of graphene flakes (GF) combined with CuS, Fe3O4 and CuS−Fe3O4 nanoparticles prepared by wet chemical methods. The and/or CuS were directly anchored onto GF without requiring additional treatment. composition, structure morphology the nanocomposites, as well pristine metal oxide/sulfide characterised X − ray photoelectron spectroscopy (XPS), Raman spectroscopy, Fourier transform infrared (FTIR), powder diffraction (XRD) scanning electron microscopy (SEM)...