Journal of the Microelectronics and Packaging Society (마이크로전자및패키징학회지)

The Korean Microelectronics and Packaging Society (한국마이크로전자및패키징학회)
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Effect of Graphene Oxide Addition to Tin Oxide Aerogel for Photocatalytic Rhodamine B Degradation

주석산화물 에어로겔의 Graphene Oxide 첨가에 따른 광촉매적 Rhodamine B 분해

  • Kim, Taehee (Department of Materials Science and Engineering, Yonsei University) ;
  • Choi, Haryeong (Department of Materials Science and Engineering, Yonsei University) ;
  • Kim, Younghun (Department of Materials Science and Engineering, Yonsei University) ;
  • Lee, Jihun (Department of Materials Science and Engineering, Yonsei University) ;
  • Park, Hyung-Ho (Department of Materials Science and Engineering, Yonsei University)
  • 김태희 (연세대학교 신소재공학과) ;
  • 최하령 (연세대학교 신소재공학과) ;
  • 김영훈 (연세대학교 신소재공학과) ;
  • 이지훈 (연세대학교 신소재공학과) ;
  • 박형호 (연세대학교 신소재공학과)
  • Received : 2021.03.17
  • Accepted : 2021.03.30
  • Published : 2021.03.30
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Abstract

SnO2 has the wide bandgap which allows it to be used as the photocatalyst. There are many studies to enhance the photocatalytic properties of SnO2. In this study, 3-dimensional SnO2 aerogel was synthesized using epoxide-initiated sol-gel method for the optimal specific surface area. Also, graphene oxide (GO) was added before the gelation process of the aerogel to maximize the specific surface area. Addition of 0.5 wt% of GO would possibly enhance the specific surface area by 1.7 times compared with the bare tin oxide aerogel. Furthermore, enhanced specific surface area could degrade 67.3% of initial Rhodamine B in 120 minutes. To compare with the bare SnO2 aerogel, 0.5 wt% GO addition to SnO2 could double the reaction rate of the photocatalytic degradation.

SnO2는 3.6 eV를 갖는 반도체 물질로 광촉매 특성을 보유하고 있는 물질이다. 광촉매 특성을 극대화하기 위해 3차원 에어로겔 화를 통하여 높은 비표면적을 확보하고자 epoxide-initiated sol-gel method를 기반으로 하여 주석 산화물 에어로겔을 합성하였다. 좀더 향상된 비표면적을 구현하고자 합성공정 중 겔화전에 graphene oxide (GO) flake의 첨가를 통해 정렬된 기공구조와 결과적으로 높은 비표면적을 확보할 수 있었다. 0.5 wt%의 GO flake의 첨가로 에어로겔 복합체의 비표면적을 약 1.7배 향상시키는 결과를 도출하였다. 이렇게 향상된 비표면적을 기반으로 Rhodamine B 염료의 분해효과를 흡수광 intensity 변화를 관찰하여 정성적으로 광촉매 효율을 비교 분석하였다. 가장 높은 비표면적을 갖는 0.5 wt%의 복합체는 120분에 67.3%의 분해 효율을 확보하였다. 또한, GO를 첨가하지 않은 SnO2 에어로겔 보다 약 2배 향상된 reaction rate를 보유하였다.

Keywords

References

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