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Synthesis of metal–cadmium sulfide nanocomposites using jingle-bell-shaped core-shell photocatalyst particles

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タイトル: Synthesis of metal–cadmium sulfide nanocomposites using jingle-bell-shaped core-shell photocatalyst particles
著者: Pal, Bonamali 著作を一覧する
Torimoto, Tsukasa 著作を一覧する
Iwasaki, Kentaro 著作を一覧する
Shibayama, Tamaki 著作を一覧する
Takahashi, Heishichiro 著作を一覧する
Ohtani, Bunsho 著作を一覧する
キーワード: cadmium sulfide
core-shell particle
gold
jingle bell structure
nanoparticle
photocatalyst
photodeposition
silver
size-selective photoetching
発行日: 2005年 7月
出版者: Springer Netherlands
誌名: Journal of Applied Electrochemistry
巻: 35
号: 7-8
開始ページ: 751
終了ページ: 756
出版社 DOI: 10.1007/s10800-005-1618-7
抄録: Photocatalytic deposition of gold (Au) and silver (Ag) nanoparticles was investigated using jingle-bell-shaped silica (SiO2)-coated cadmium sulfide (CdS) nanoparticles (SiO2/CdS), which each had a void space between the CdS core and SiO2 shell, as a photocatalyst. A size-selective photoetching technique was used to prepare the jingle bell nanostructure of SiO2/CdS. Nanoparticles of Au and Ag were deposited by irradiation of the photoetched SiO2/CdS in the presence of the corresponding metal complexes under deaerated conditions. Chemical etching of Au-deposited particles enabled the selective removal of CdS without any influence on the surface-plasmon absorption of Au. TEM analyses of the resulting particles suggested that some particles were encapsulated in hollow SiO2 particles, while other Au particles were deposited on the outer surface of the SiO2 shell. Emission spectra of the photoetched SiO2/CdS showed that the metal deposition developed a broad emission with a peak around 650 nm originating from surface defect sites, the degree being dependent on the kind of metal nanoparticles and their amount of deposition. This fact can be explained by the formation of metal–CdS binary nanoparticles having defect sites at the interface between metal and CdS.
Rights: The original publication is available at www.springerlink.com
資料タイプ: article (author version)
URI: http://hdl.handle.net/2115/14642
出現コレクション:雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

提供者: 大谷 文章

 

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