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Growth, size and photoactivity of CdS, ZnS or PbS particles in NaX zeolite

Published online by Cambridge University Press:  15 February 2011

M. Wark ,
G. Schulz-Ekloff ,
N. I. Jaeger  and
W. Lutz
M. Wark
Affiliation:
Institut für Angewandte und Physikalische Chemie, Universität Bremen, D-2800 Bremen 33, Germany
G. Schulz-Ekloff
Affiliation:
Institut für Angewandte und Physikalische Chemie, Universität Bremen, D-2800 Bremen 33, Germany
N. I. Jaeger
Affiliation:
Institut für Angewandte und Physikalische Chemie, Universität Bremen, D-2800 Bremen 33, Germany
W. Lutz
Affiliation:
Zentralinstitut f¨r Physikalische Chemie, D-1099 Berlin, Germany
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Abstract

CdS, ZnS or PbS dispersions are prepared in a NaX matrix by ion exchange and gas phase sulfidation. The degree of sulfidation remains incomplete in all cases. This fact can be explained by preferential bonding of the cations to the zeolite framework and to an increase of the solubility constants for quantum-size particles. Zeolite-hosted sulfide particles grow to supra-supercage size under fragmentation of the host framework. The shift of the position of the optical absorption edge correlates with the sulfide particle size obtained from transmission electron micrographs. The rate of photocorrosion of the sulfide clusters strongly depends on the particle size between 1 and 10 nm.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 233: Symposium U – Synthesis/Characterization and Novel Applications of Molecular Sieve Materials , 1991 , 133
Copyright
Copyright © Materials Research Society 1991

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References

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