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Few layer reduced graphene oxide : evaluation of the best experimental conditions for easy production

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Few layer reduced graphene oxide : evaluation of the best experimental conditions for easy production

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Título Few layer reduced graphene oxide : evaluation of the best experimental conditions for easy production
Autor Pavoski, Giovani
Maraschin, Thuany Garcia
Fim, Fabiana de Carvalho
Balzaretti, Naira Maria
Galland, Griselda Ligia Barrera
Moura, Cassio Stein
Basso, Nara Regina de Souza
Abstract This work aimed to produce graphene oxide with few graphene layers, a low number of defects, good conductivity and reasonable amount of oxygen, adequate for use as filler in polymeric composites. Two starting materials were evaluated: expanded graphite and graphite flakes. The method of oxidation used was the Staudenmaier one, which was tested over different lengths of time. No appreciable differences were found among the oxidation times and so the lowest oxidation time (24 h) was chosen as the most adequate. An investigation was also conducted into suitable temperatures for the reduction of graphite oxide. A temperature of 1000 ºC gave the best results, allowing a good quality material with few defects to be obtained. The reduction was also evaluated under inert and normal atmosphere. The best results were obtained when the least modified material, e. g., graphite flakes, was used as a starting material, oxidized for 24h and reduced at 1000 ºC for 30 s in a quartz ampoule under a normal atmosphere.
Contido em Materials research : ibero-american journal of materials. Vol. 20, no. 1 (Jan./Feb. 2017), p. 53-61
Assunto Grafeno
Grafite
Oxidação
[en] Few layer graphene
[en] Graphene
[en] Graphene oxide
[en] Graphite
Origem Estrangeiro
Tipo Artigo de periódico
URI http://hdl.handle.net/10183/165622
Arquivos Descrição Formato
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