Electron-transfer reactions of extremely small AgI colloids |
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| Institution: | 1. Univ. Grenoble Alpes, IPAG, F-38000 Grenoble, France;2. CNRS, IPAG, F-38000 Grenoble, France;3. Ecole Centrale de Paris, Chatenay Malabry, France;4. Université Versailles St-Quentin, Sorbonne Universités, UPMC Univ., Paris 06, France;5. CNRS/INSU, LATMOS-IPSL, Guyancourt F-78280, France;6. Institut Universitaire de France, Paris F-75005, France;7. LISA, UMR 7583 du CNRS, Université Paris-Est Créteil, Université Paris-Diderot, Créteil, France;8. Ecole Normale Supérieure de Lyon, Université Claude Bernard, CNRS, LGLTPE, 69364 Lyon Cedex 07, France;9. Institut d’Astrophysique Spatiale (IAS), Université Paris-Sud, UMR 8617-CNRS INSU, Bât 121, F-91405 Orsay, France;10. Centre de Sciences Nucléaires et de Spectrométrie de Masse (CSNSM), Université Paris-Sud, UMR 8609-CNRS/IN2P3, F-91405 Orsay, France;1. Centro de Ciências Naturais e Humanas, Universidade Federal do ABC (UFABC), Santo André, SP, Brazil;2. Division of Chemistry, Graduate School of Science, Kyoto University, Kitashirakawa-Oiwakecho, Sakyo-ku, Kyoto, Japan;3. INAMORI Frontier Research Center, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka, 819-3095, Japan;1. King Saud University, Science College, Botany and Microbiology Department, P.O. Box 2455, Riyadh 11451, Saudi Arabia;2. Alexandria University, Faculty of Science, Botany and Microbiology Department, P.O. Box 21511, Alexandria, Egypt;3. Al-Bassam Sch., Ministry of Education, P.O. Box 945, Dammam, Saudi Arabia;4. Prince Sultan Research Chair for Environment and Wild Life, King Saud University, Saudi Arabia;1. Glass and Ceramic Laboratory, Institute of Chemical Sciences of Rennes, UMR-CNRS 6226, University of Rennes 1, 35042 Rennes cedex, France;2. Department of Materials Science and Engineering, Zhejiang University, 38 Zheda Road, Hangzhou 310027, China;1. Museum für Naturkunde, Leibniz-Institut für Evolutions- und Biodiversitätsforschung, Invalidenstraße 43, 10115 Berlin, Germany;2. Institut für Geologische Wissenschaften, Freie Universität Berlin, Malteserstraße 74–100, 12249 Berlin, Germany;3. Humboldt-Universität zu Berlin, Unter den Linden 6, 10099 Berlin, Germany |
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| Abstract: | Small colloidal AgI particles (particle diameter (20–50 Å) have been prepared in water and acetonitrile, and optical effects due to size quantization have been observed. Electron transfer reactions involving electron donors and electron acceptors with AgI have been studied by pulse radiolysis techniques. Both reduction and oxidation of the colloids led to transient bleaching of semiconductor absorption. The recovery of the bleaching has been attributed to corrosion processes. Electrons injected into AgI colloids produce metallic silver and hydrogen. Hydrogen evolution is catalyzed by metallic silver formation. |
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