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Photoluminescence properties of Ag2S semiconductor clusters synthesized in micropores and mesopores
Authors:Shuai Yuan  Masanori Tomonari  Daisuke Matsuo  Kohsuke Mori  Tomoya Uruga  Hiromi Yamashita
Affiliation:1. Division of Materials and Manufacturing Science Graduate School of Engineering, Osaka University, 2-1 Yamada-oka, 565-0871, Suita, Osaka, Japan
2. SPring-8, Japan Synchrotron Radiation Research Institute, Mikazuki, 679-5198, Hyogo, Japan
Abstract:Silver sulfide (Ag2S) clusters were synthesized in microporous zeolites and mesoporous AlMCM-41 by the sulfurization of Ag+ ions exchanged within the pores of the host. Characterization was performed by means of XRD, UV-Vis Ag K-edge XAFS and photoluminescence. The pore size of the host has great effects on the photoluminescence properties. Ag2S/AlMCM-41 showed photoluminescence at the longer wavelengths than Ag2S/zeolites. The photoluminescence band of Ag2S in the zeolite with 1-dimensional channels was narrow in comparison to the Ag2S in zeolites with 2- or 3-dimensional channels.
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