Nanoclusters of silver doped in zeolites as photocatalysts

Autor:	Howard H. Patterson, Haiyan Lu, Renante L. Yson, Robert S. Gomez
Rok vydání:	2007
Předmět:	Materials science Photoluminescence Inorganic chemistry General Chemistry Molecular sieve Catalysis Nanoclusters chemistry.chemical_compound Transition metal chemistry X-ray crystallography Sodalite Zeolite Powder diffraction
Zdroj:	Catalysis Today. 120:168-173
ISSN:	0920-5861
DOI:	10.1016/j.cattod.2006.07.057
Popis:	Nanoclusters of silver and iron ions doped in Y zeolite and sodalite have been prepared. Photoluminescence spectra of Ag-Y zeolite, Ag/Fe 2 O 3 -Y zeolite, Ag-sodalite, and Ag/Fe 2 O 3 -sodalite were obtained from 4.5 to 298 K and revealed the formation of different kinds of silver clusters in the zeolite hosts. The amount of silver and iron in the corresponding material were determined using atomic absorption spectroscopy. The purity and unit cell structure of each catalysts was determined using X-ray powder diffraction analysis. It was found that while the structure of the support materials remained relatively intact after the incorporation of Ag + and Fe 3+ onto the supports, differences in the structure of the support corresponded with differences in cluster size and composition. It was also found that adding Fe 2 O 3 to Ag-Y zeolite shifted the observed Ag cluster photoluminescence to longer wavelengths, while Ag-sodalite remains largely unaffected by the addition of Fe 2 O 3 . This further supports the conclusion that the structure of the support material plays a major role in cluster formation.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::b4db5e5b2bbf7da06078d639b9be64a1 https://doi.org/10.1016/j.cattod.2006.07.057 Zobrazit plný text záznamu Full Text from ScienceDirect