Graphene, a two-dimensional, single-layer sheet of sp2 hybridized carbon atoms, has attracted tremendous attention of the scientific community due to its exceptional physical, thermal and electric properties. Actually, metal and metallic oxide nanoparticles have been incorporated on graphene structure with the purpose of enhance or change its original properties when the composite is formed. The method most employed for preparing graphene sheets (GS) is the chemical oxidation and exfoliation of graphite in the liquid media following by the chemical reduction. The need to carry out the reduction process, to reduce the defects in the structure of graphene, allows the prospect of preparation of the graphene/nanoparticles composite in a single step. A variety of reduction methods and incorporation of nanoparticles is reported in the literature. Although some studies describe the embedding nanoparticles on graphene sheets, the controlled production of dimensions and morphologies, as well as an effective anchoring of the nanoparticles still are great challenges. This project aims to develop a new main route for the preparation of graphene/metal nanoparticles and graphene/metal oxide composites by modified polyol method. Using this procedure, it intends to incorporate the nanoparticles of manner in situ, with the prospect of obtaining monodisperse magnetic nanoparticles and self-assembled on the graphene sheets. Composites will be characterized by techniques: transmission electron and atomic force microscopy, Raman, UV-visible and infrared spectroscopy, X-ray diffraction and vibrant sample magnetometry.
News published in Agência FAPESP Newsletter about the scholarship: