The influence of gamma radiation doses on rGO/Ni for energy storage applications
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2022
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INTERNATIONAL CONFERENCE ON APPLICATIONS OF RADIATION SCIENCE AND TECHNOLOGY, 2nd
Resumo
Metallic nanoparticles (MN) have been the subject of intense research in the last decades because of their
high catalytic activity, associated with its large surface-to-volume ratio. However, it is difficult to obtain pure
active metal nanoparticles surfaces, since its contamination and aggregation frequently result in deactivation
and loss of catalytic activities. MN immobilization can minimize these effects. Thermal, mechanical, and electrical
properties of reduced graphene oxide (rGO) make this material an excellent candidate for MN support
for batteries and supercapacitors. The production of metallic nanoparticles on rGO surface based on gamma
radiation allows less formation of residual impurities, absence of reducing agents, uniform mass production,
no aggregation and low costs. Herein, we demonstrated a green and efficient one-step, gamma radiation-based
method for Ni/rGO production.
Graphene oxide (GO) was prepared by modified Hummers method. Ni+2 and graphene oxide reduction were
performed in water/isopropanol solution (1:1) under inert medium. Samples were irradiated in the Multipurpose
Gamma Irradiation Facility at CETER/IPEN/CNEN-SP, a category IV gamma irradiator by the IAEA
classification, in radiations doses of 20, 40, and 80 kGy, at 10 kGy/h. From X-ray diffraction, the correlation between
radiation doses and crystallite size was evaluated. For supercapacitor studies, cyclic voltammetry was
carried out in a screen printed carbon electrode (SPCE) in K₄[Fe(CN)₆]. The working electrode was modified
with produced rGO-Ni 80 kGy, Pt wire was used as counter and Ag/AgCl as reference electrode. Experiments
were performed in KOH 1.0 M.
Results showed that produced Ni/rGO has good potential to be used in electrochemical devices such as supercapacitors
or batteries.
Como referenciar
GARCIA, RAFAEL H.L.; CARNEIRO, FELIPE W.; JACOVONE, RAYNARA M.S.; SAKATA, SOLANGE K.; ANGNES, LUCIO. The influence of gamma radiation doses on rGO/Ni for energy storage applications. In: INTERNATIONAL CONFERENCE ON APPLICATIONS OF RADIATION SCIENCE AND TECHNOLOGY, 2nd, August 22-26, 2022, Vienna, Austria. Abstract... Vienna, Austria: International Atomic Energy Agency (IAEA), 2022. Disponível em: http://repositorio.ipen.br/handle/123456789/33844. Acesso em: 28 Mar 2024.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.