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  • 02월 19일 10시 이후 : 초록수정 불가능, 일정확인 및 검색만 가능

대한화학회 제121회 학술발표회 및 총회 Synthesis of Metal-Semiconductor Double Shell Hollow Nanocubes for Highly stable Water Splitting Photocatalysts

2018년 2월 7일 10시 08분 48초
INOR.P-107 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
4월 19일 (목요일) 11:00~12:30
Inorganic Chemistry
저자 및
Woong Choi, Hyunjoon Song*
Department of Chemistry, Korea Advanced Institute of Science and Technology, Korea
A rational combination of nanoscale reactions can offer complex nanostructures with multiple components. In the present study, a general synthetic protocol was developed to generate metal-CdSe double shell hollow nanocubes. Three well-known nanoscale reactions, Galvanic replacement, chalcogenization, and cationic exchange, were sequentially applied to the original Ag nanocubes, yielding PtAg, Pt-Ag2Se, and Pt-CdSe hollow nanocubes, respectively. The final structure was composed of two distinct layers of Pt and CdSe domains. Thin and continuous Pt inner layers were formed at the stage of selenization due to the nanoscale Kirkendall effect. With the variation of the metals (Pt, Au, and Pd) and metal selenides (Ag2Se, CdSe), six different metal-semiconductor hybrids were produced with an identical morphology of the double shell hollow nanocubes. Thicknesses of metal and CdSe layers were also regulated by controlling amounts of metal contents at the Galvanic replacement step. The resulting Pt-CdSe double shell hollow nanocubes effectively catalyzed photochemical hydrogen evolution reactions with long term stability.