Synthesis snd characterization of graphene/nanoparticles (FePt, Fe3O4) composites by the modified polyol method

• Grant number: 13/18542-4
• Support type: Scholarships in Brazil - Master
• Effective date (Start): February 01, 2014
• Effective date (End): January 31, 2016
• Field of knowledge: Physical Sciences and Mathematics - Chemistry - Physical-Chemistry
• Principal researcher: Laudemir Carlos Varanda
• Grantee: Rebecca Faggion Albers
• Home Institution: Instituto de Química de São Carlos (IQSC). Universidade de São Paulo (USP). São Carlos , SP, Brazil

Abstract

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.

Scientific publications

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

MASCARENHAS, BRUNO C.; VARANDA, LAUDEMIR C. Catalytic hydrogenation of organic dyes by Ag nanoparticles on reduced graphene oxide. JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY, v. 103, p. 124-135, NOV 25 2021. Web of Science Citations: 0.

ALBERS, REBECCA F.; BINI, RAFAEL A.; SOUZA, JR., JOAO B.; MACHADO, DERIK T.; VARANDA, LAUDEMIR C. A general one-pot synthetic strategy to reduced graphene oxide (rGO) and rGO-nanoparticle hybrid materials. Carbon, v. 143, p. 73-84, MAR 2019. Web of Science Citations: 5.

Academic Publications

(References retrieved automatically from State of São Paulo Research Institutions)

ALBERS, Rebecca Faggion. Synthsis and characterization of graphene/nanoparticles of FePt and Fe3O4 composites by the modified polyol process. 2016. Master's Dissertation - Universidade de São Paulo (USP). Instituto de Química de São Carlos (IQSC/BT) São Carlos.