Crumpled Graphene Decorated with Manganese Ferrite Nanoparticles for Hydrogen Peroxide Sensing and Electrochemical Supercapacitors

Autor(es)

Nonaka, Larissa H. ^[1] ; Almeida, Thiago S. D. ^[1] ; Aquino, Caroline B. ^[2] ; Domingues, Sergio H. ^[2] ; Salvatierra, V, Rodrigo ; Souza, Victor H. R. ^[1]

Afiliação do(s) autor(es)

^[1] Fundacao Univ Fed Grande Dourados, Fac Exact Sci & Technol, BR-79825070 Dourados, MS - Brazil

^[2] Univ Prebiteriana Mackenzie, MackGraphe Graphene & Nanomat Res Ctr, BR-01302907 Sao Paulo - Brazil

• Tipo de documento: Artigo Científico
• Fonte: ACS APPLIED NANO MATERIALS; v. 3, n. 5, p. 4859-4869, MAY 22 2020.
• Citações Web of Science: 0

Resumo

Nanomaterials properties are deeply dependent on several features, being easily tuned according to its composition, shape, and dimensionality. Graphene, a two-dimensional (2D) material has outstanding properties that may be tailored by turning its shape to 3D conformations, similar to crumpled paper ball-like structures. Thus, some drawbacks related to graphene restacking could be avoided, besides enlightening a way to explore the properties of graphene-based materials. Herein, we synthesize crumpled graphene structures fully decorated by manganese ferrite (MnFe2O4) nanoparticles in one single step. The samples were produced using an aerosol-assisted capillary compression process and the crumpled paper-ball-like shape of the composites could be adjusted to incorporate increasing amounts of manganese ferrite nanoparticles. We explored two different applications for the obtained materials: as an electrochemical sensor for hydrogen peroxide, and electrochemical supercapacitors. As a proof-of-concept, we synthesized bare manganese ferrite and a composite of flat rGO:MnFe2O4, which assisted us to certify that the best performance is related to the synergistic effect between components, the ratio between them, and the proper shape of the composite. (AU)

• Processo FAPESP: 18/02142-0 - Nanocompósitos binários baseados em óxidos de metais de transição mistos bidimensionais e polianilina para aplicação em dispositivos de armazenamento de energia flexíveis
• Beneficiário: Caroline Brambilla de Aquino
• Modalidade de apoio: Bolsas no Brasil - Mestrado
• Processo FAPESP: 17/21988-5 - Nanocompósitos baseados em derivados de grafeno, óxidos metálicos bidimensionais e polímeros conjugados para aplicação em dispositivos flexíveis de armazenamento de energia
• Beneficiário: Sergio Humberto Domingues
• Modalidade de apoio: Auxílio à Pesquisa - Regular