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제124회 대한화학회 학술발표회, 총회 및 기기전시회 A Critical Role of the Interlayer Distance of Nanosheets in Tailoring Their Optical and Electronic Properties

2019년 8월 22일 11시 58분 05초
MAT.P-345 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
10월 17일 (목요일) 11:00~12:30
Material Chemistry
저자 및
Tae-Ha Gu, Seong-Ju Hwang1,*
Department of Chemistry and Nanoscience, Center for Hybrid Interfacial Chemical Structure (CICS), Ewha Womans University, Korea
1Department of Materials Science and Engineering, Center for Hybrid Interfacial Chemical Structure (CICS), Yonsei University, Korea
Despite many advantages of 2D inorganic nanosheets (NSs) as building blocks for hybrid-type photocatalysts, there has been no systematic research about evolutions of the optical and electronic properties of restacked NSs upon the alteration of their interlayer distance. To investigate the correlation between the optical/electronic properties and interlayer distance of restacked NSs, we synthesized a series of intercalative nanohybrids of layered titanate NS and reduced graphene oxide (rGO) NS with various interlayer distances. The interlayer distance of restacked NSs can be finely controlled by employing various n-alkyalmine molecules as intercalants. The increase of interlayer distance via intercalation of long chain n-alkylamine leads to the significant depression of visible light absorptivity and the subsequent depression of photocatalytic functionality, highlighting the weakening of interfacial electronic coupling between restacked titanate and rGO NSs. The present study clearly demonstrates that the intercalative hybridization with various n-alkyalmine molecules can provide an efficient way of tailoring the interfacial electronic coupling between restacked inorganic NSs and their photocatalytic functionality.