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Received January 18, 2018
Accepted February 27, 2018
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녹색 촉매반응을 위한 코발트 옥사이드/그래핀의 계층적 다공성 3D 젤
Hierarchical Porous 3D gel of the Co3O4/graphene with Enhanced Catalytic Performance for Green Catalysis
한국과학기술원 생명화학공학과, 34141 대전광역시 유성구 대학로 291
Department of Chemical & Biomolecular Engineering, KAIST, 291, Daehak-ro, Yuseong-gu, Daejeon, 34141, Korea
Korean Chemical Engineering Research, June 2018, 56(3), 404-409(6), 10.9713/kcer.2018.56.3.404 Epub 4 June 2018
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Abstract
나노사이즈의 유기물과 무기물을 조합하여 계층적인 크기의 기공을 가지는 촉매의 개발은 서로 다른 특징을 갖는 물질의 구조제어를 통한 반응물의 이동 통로를 만들어 주어 다양한 촉매에 적용 될 수 있다. 본 연구에서는 계층적 크기의 기공을 가지기 때문에 PET 글리콜리시스에서 우수한 촉매 활성을 보일 수 있는 코발트 옥사이드/그래핀 3D 젤을 수열합성법에 의하여 제조하였다. 코발트 옥사이드와 그래핀 시트의 상호작용에 의하여 3D 젤을 얻었고, 다양한 크기의 기공 구조는 넓은 활성 면적을 주어 코발트 옥사이드의 효과적인 촉매반응을 가능하게 하였다. 촉매로 사용하였을 때 코발트와 그래핀의 시너지 효과는 제조한 물질의 구조적 장점을 가지도록 하였고, 제조한 물질을 PET 분해반응의 BHET의 높은 전환률(97.5%), 빠른 PET 분해속도(94.5%, 60 min), 반응 안정성(93.1%, 18회 재사용) 등 우수한 촉매 활성능을 보였다.
The integration of organic and inorganic building blocks into hierarchical porous architectures makes potentially desirable catalytic material in many catalytic applications due to their combination of dissimilar components and well-constructed reactant transport path. In this study, we prepared the hierarchical porous Co3O4@graphene 3D gel by hydrothermal method to achieve high catalytic performance in PET glycolysis reaction. Obtained Co3O4@graphene 3D gel consisted of interconnected networks of Co3O4 and graphene sheets, providing large number of accessible active sites for efficient catalytic reaction. These structural merits from synergistic effect of Co3O4 and graphene gave a high performance in the PET degradation reaction giving high conversion yield of BHET, fast degradation rate of PET, and remarkable stability.
Keywords
References
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