Toward Green Synthesis of Graphene Oxide Using Recycled Sulfuric Acid via Couette–Taylor Flow | Zendy

Won Kyu Park | Zendy; Yeojoon Yoon | Zendy; Seungdu Kim | Zendy; Su Yeon Choi | Zendy; Seon-Mi Yoo | Zendy; Youngjin Do | Zendy; Seungon Jung | Zendy; Dae Ho Yoon | Zendy; Hyesung Park | Zendy; Woo Seok Yang | Zendy

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Toward Green Synthesis of Graphene Oxide Using Recycled Sulfuric Acid via Couette–Taylor Flow

Author(s) -

Won Kyu Park,

Yeojoon Yoon,

Seungdu Kim,

Su Yeon Choi,

Seon-Mi Yoo,

Youngjin Do,

Seungon Jung,

Dae Ho Yoon,

Hyesung Park,

Woo Seok Yang

Publication year - 2017

Publication title -

acs omega

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.779

H-Index - 40

ISSN - 2470-1343

DOI - 10.1021/acsomega.6b00352

Subject(s) - sulfuric acid , filtration (mathematics) , graphene , taylor–couette flow , oxide , fabrication , materials science , chemical engineering , production cost , environmentally friendly , commodity chemicals , couette flow , process (computing) , raw material , process engineering , pulp and paper industry , nanotechnology , chemistry , flow (mathematics) , organic chemistry , computer science , catalysis , mathematics , metallurgy , engineering , mechanical engineering , alternative medicine , ecology , pathology , biology , operating system , geometry , medicine , statistics

Developing eco-friendly and cost-effective processes for the synthesis of graphene oxide (GO) is essential for its widespread industrial applications. In this work, we propose a green synthesis technique for GO production using recycled sulfuric acid and filter-processed oxidized natural graphite obtained from a Couette-Taylor flow reactor. The viscosity of reactant mixtures processed from Couette-Taylor flow was considerably lower (∼200 cP at 25 °C) than that of those from Hummers' method, which enabled the simple filtration process. The filtered sulfuric acid can be recycled and reused for the repetitive GO synthesis with negligible differences in the as-synthesized GO qualities. This removal of sulfuric acid has great potential in lowering the overall GO production cost as the amount of water required during the fabrication process, which takes a great portion of the total production cost, can be dramatically reduced after such acid filtration. The proposed eco-friendly GO fabrication process is expected to promote the commercial application of graphene materials into industry shortly.

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