Ternary nanocomposites of reduced graphene oxide, polyaniline and hexaniobate: hierarchical architecture and high polaron formation

Autor(es)

Silva, Claudio H. B. ^{[1, 2, 3, 4]} ; Iliut, Maria ^{[2, 3]} ; Muryn, Christopher ^{[5, 6]} ; Berger, Christian ^{[2, 3]} ; Coldrick, Zachary ^[7] ; Constantino, Vera R. L. ^[1] ; Temperini, Marcia L. A. ^[1] ; Vijayaraghavan, Aravind ^{[2, 3]}

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Inst Chem, Dept Fundamental Chem, Av Prof Lineu Prestes 748, BR-05508000 Sao Paulo - Brazil

^[2] Univ Manchester, Sch Mat, Booth St E, Manchester, Lancs - England

^[3] Univ Manchester, Natl Graphene Inst, Booth St E, Manchester, Lancs - England

^[4] Univ Fed Bahia, Inst Chem, Dept Phys Chem, Rua Barao Jeremoabo 147, BR-40170115 Salvador, BA - Brazil

^[5] Univ Manchester, Sch Chem, Alan Turing Bldg, Oxford Rd, Manchester M13 9PY, Lancs - England

^[6] Univ Manchester, Photon Sci Inst, Alan Turing Bldg, Oxford Rd, Manchester M13 9PY, Lancs - England

^[7] Univ Manchester, Sch Elect & Elect Engn, Sackville St Bldg, Manchester M1 3BB, Lancs - England

• Tipo de documento: Artigo Científico
• Fonte: BEILSTEIN JOURNAL OF NANOTECHNOLOGY; v. 9, p. 2936-2945, NOV 26 2018.
• Citações Web of Science: 3

Resumo

Nanostructured systems, such as nanocomposites, are potential materials for usage in different fields since synergistic effects of their components at the nanoscale domain may improve physical/chemical properties when compared to individual phases. We report here the preparation and characterisation of a new nanocomposite composed of polyaniline (PANI), reduced graphene oxide (rGO) and hexaniobate (hexNb) nanoscrolls. Atomic force microscopy images show an interesting architecture of rGO flakes coated with PANI and decorated by hexNb. Such features are attributed to the high stability of the rGO flakes prepared at room temperature. Detailed characterisation by X-ray photoelectron and Raman spectroscopies indicates an intermediate reduction degree for the rGO component and high doping degree of the PANI chains compared to the neat polymer. The latter feature can be attributed to cooperative effects of PANI chains with rGO flakes and hexNb nanoscrolls, which promote conformational changes of the polymer backbone (secondary doping). Spectroscopic and electrochemistry data indicate a synergetic effect on the ternary nanocomposite, which is attributed to interactions between the components resulting from the morphological aspects. Therefore, the new nanocomposite presents promising properties for development of new materials in the film form on substrates for sensing or corrosion protection for example. (AU)

• Processo FAPESP: 11/50318-1 - Desenvolvimento de compostos com interesse farmacológico ou medicinal e de sistemas para seu transporte, detecção e reconhecimento no meio biológico
• Beneficiário: Ana Maria da Costa Ferreira
• Modalidade de apoio: Auxílio à Pesquisa - Temático
• Processo FAPESP: 13/03013-6 - Materiais Híbridos Ternários de Grafenos, Polianilina e Hexaniobatos empregados em Eletrodos Supercapacitores: Caracterizações Espectroscópica, Morfológica, Eletroquímica e Térmica
• Beneficiário: Claudio Hanashiro Barbosa Silva
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado
• Processo FAPESP: 12/13119-3 - Espectroscopia vibracional em fases condensadas
• Beneficiário: Mauro Carlos Costa Ribeiro
• Modalidade de apoio: Auxílio à Pesquisa - Temático
• Processo FAPESP: 14/05048-4 - Materiais híbridos ternários de grafenos, polianilina e hexaniobatos: novos materiais para eletrodos supercapacitores
• Beneficiário: Claudio Hanashiro Barbosa Silva
• Modalidade de apoio: Bolsas no Exterior - Estágio de Pesquisa - Pós-Doutorado