Applied Chemistry for Engineering (공업화학)

The Korean Society of Industrial and Engineering Chemistry (한국공업화학회)
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Comparative Studies on Three Kinds of Reductants Applicable for the Reduction of Graphene Oxide

그래핀 옥사이드의 환원 반응에 적용되는 3종류 환원제에 관한 비교 연구

  • Park, No Il (Department of Polymer Engineering, College of Engineering, Suwon University) ;
  • Park, Wan-Su (Department of Polymer Engineering, College of Engineering, Suwon University) ;
  • Lee, Seul Bi (EverChemTech Co., Ltd.) ;
  • Lee, Seong Min (EverChemTech Co., Ltd.) ;
  • Chung, Dae-Won (Department of Polymer Engineering, College of Engineering, Suwon University)
  • Received : 2014.12.01
  • Accepted : 2014.12.24
  • Published : 2015.02.10
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Abstract

We conducted reduction reactions of graphene oxide (GO) using three selected reductants. The conductivity and solubility of three kinds of the reduced graphene oxides (RGOs) were examined based on the degree of reduction. When the ethylene glycol (EG) was used as a reductant, the reduction reaction did not sufficiently progress and as a result the conductivity of RGOs was observed to be relatively low. For RGOs made by hydrazine (HZ) and thiourea dioxide (TU), we observed no significant differences in the degree of the reduction, conductivity and dispersity in water. However, RGO prepared by TU showed an exceptionally good solubility in N-methylpyrrolidone, and the solution was stable for more than 4 months.

본 연구에서는, 그래핀 옥사이드(GO)의 환원에 가장 보편적으로 사용되는 3종류의 환원제를 사용하여 환원 그래핀 옥사이드(RGO)를 제조하였다. 합성된 3종류 RGO의 화학적 구조를 비교/분석하여 구조적 특징에 따른 전도도 및 분산성의 차이를 고찰하였다. Ethylene glycol을 사용한 경우에는 환원도가 낮고 전도도도 상대적으로 낮았다. 반면에 hydrazine과 thiourea dioxide (TU)를 사용하여 합성한 RGO에서는 환원 정도, 전도도 및 물에서의 분산성 등에 차이가 거의 없었다. 그러나 N-methylpyrrolidone에서의 분산성은 TU에 의해 합성된 RGO에서 가장 우수하여 4개월 후에도 안정적인 분산액을 유지하였다.

Keywords

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