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초록
The surface coating-dependent catalytic activity of icosahedral Au nanoparticles (IAuNPs) for the reduction of 4-nitrophenol by NaBH4 in aqueous solution was investigated. Cetyltrimethylammonium bromide (CTAB)-stabilized IAuNPs with average size of 50 nm were prepared by three-step seeding protocol. The CTAB was then exchanged with several amine derivatives such as pyrrole, pyridine, 2,2'-bipyridine, and 4,4'-bipyridine. The catalytic reaction rates of nanoparticles are in the order of IAuNPs@4,4'-bpy > IAuNP5@2,2'-bpy > IAuNPs@pyridine > IAuNPs@pyrrole > IAuNPs@CTAB, revealing that the catalytic activity of the nanoparticles highly depends on the type and structure of the ligand molecules. (C) 2010 Elsevier B.V. All rights reserved.
키워드
Au nanoparticles; 4,4 '-Bipyridine; 4-Nitrophenol reduction; Electron transfer; Ligand structure; ENHANCED RAMAN-SCATTERING; GOLD NANOPARTICLES; SURFACE; METAL; ADSORPTION; SIZE; STABILITY; CHEMISTRY; FILMS; SERS
- 제목
- Effect of ligand structure on the catalytic activity of Au nanocrystals
- 저자
- Lee, Kang Yeol; Lee, Young Wook; Lee, Joon-Hwa; Han, Sang Woo
- 발행일
- 2010-12-03
- 유형
- Article
- 권
- 372
- 호
- 1-3
- 페이지
- 146 ~ 150