Title: Quantum-sized silver, silver chloride and silver sulfide clusters
Authors : Calzaferri, Gion
Brühwiler, Dominik
Glaus, Stephan
Schürch, David
Currao, Antonio
Leiggener, Claudia
Published in : Journal of Imaging Science and Technology
Volume(Issue) : 45
Issue : 4
Pages : 331
Pages to: 339
Publisher / Ed. Institution : Society for Imaging Science and Technology
Issue Date: Jul-2001
License (according to publishing contract) : Licence according to publishing contract
Type of review: Peer review (Publication)
Language : English
Subject (DDC) : 540: Chemistry
Abstract: Thin AgCl layers photocatalytically oxidize water to O2 under appropriate conditions. The photoactivity of AgCl extends from the UV into the visible light region in a process known as self-sensitization, which is due to the formation of silver during the photoreaction. This silver can be almost quantitatively reoxidized electrochemically, making it feasible that a thin AgCl layer deposited on a conducting substrate can be used as a photoanode for water splitting if coupled with an appropriate photocathode. The silver chloride/silver cluster phase boundary plays a decisive role in the photocatalytic silver chloride electrode system. We have therefore studied this interphase by means of quantum chemical calculations from which we report first results, specifically for the (Ag)115(AgCl)192 composite. Clusters of semiconducting materials are interesting considering their application as a photocathode in such a device. In this context, we also report the synthesis and properties of luminescent quantum-sized silver sulfide clusters in the cavities of zeolite A. The color of the silver sulfide zeolite A composites ranges from colorless (low loading) to yellow–green (medium loading) to brown (high loading). A low silver sulfide content is characterized by a blue–green luminescence and distinct absorption bands, while samples with medium or high silver sulfide content show an orange or red colored emission and a continuous absorption.
Departement: Life Sciences und Facility Management
Organisational Unit: Institute of Chemistry and Biotechnology (ICBT)
Publication type: Article in scientific Journal
ISSN: 1062-3701
URI: http://www.ingentaconnect.com/content/ist/jist/2001/00000045/00000004/art00004
Appears in Collections:Publikationen Life Sciences und Facility Management

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