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Design and photo-Fenton performance of Graphene/CuS/Fe3O4 tertiary nanocomposit...
Matos, Renata; Kuźniarska-Biernacka, Iwona; Rocha, Mariana; Belo, João H.; Araújo, João Pedro; Estrada, Ana C.; Lopes, Joana L.; Shah, TushtiThis study describes nanocomposites of graphene flakes (GF) combined with CuS, Fe3O4 and CuS−Fe3O4 nanoparticles prepared by wet chemical methods. The Fe3O4 and/or CuS nanoparticles were directly anchored onto GF without requiring additional chemical treatment. The composition, structure and morphology of the nanocomposites, as well as of the pristine GF and metal oxide/sulfide nanoparticles were characterised ...
A general route for growing metal sulfides onto graphene oxide and exfoliated g...
Lopes, Joana L.; Estrada, Ana C.; Fateixa, Sara; Ferro, Marta; Trindade, TitoGraphene-based materials are elective materials for a number of technologies due to their unique properties. Also, semiconductor nanocrystals have been extensively explored due to their size-dependent properties that make them useful for several applications. By coupling both types of materials, new applications are envisaged that explore the synergistic properties in such hybrid nanostructures. This research r...
Functionalized magnetite particles for adsorption of colloidal noble metal nano...
Lopes, Joana L.; Marques, Karine L.; Girao, Ana V.; Pereira, Eduarda; Trindade, TitoMagnetite (inverse spinel type) particles have been surface-modified with siliceous shells enriched in dithiocarbamate groups. The deposition of colloidal noble metal nanoparticles (Au, Ag, Pt, Pd) onto the modified magnetites can be performed by treating the respective hydrosols with the magnetic sorbents, thus allowing their uptake from water under a magnetic gradient. In particular, for Au colloids, these ma...