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CdS-silica xerogel nanocomposites: Processing-induced textural changes

Published online by Cambridge University Press:  03 March 2011

E. Blanco,
R. Litrán,
M. Ramírez-del-Solar,
N. de la Rosa-Fox and
L. Esquivias
E. Blanco
Affiliation:
Departamento de Estructura y Propiedades de los Materiales, Facultad de Ciencias, Universidad de Cádiz, Spain
R. Litrán
Affiliation:
Departamento de Estructura y Propiedades de los Materiales, Facultad de Ciencias, Universidad de Cádiz, Spain
M. Ramírez-del-Solar
Affiliation:
Departamento de Estructura y Propiedades de los Materiales, Facultad de Ciencias, Universidad de Cádiz, Spain
N. de la Rosa-Fox
Affiliation:
Departamento de Estructura y Propiedades de los Materiales, Facultad de Ciencias, Universidad de Cádiz, Spain
L. Esquivias
Affiliation:
Departamento de Estructura y Propiedades de los Materiales, Facultad de Ciencias, Universidad de Cádiz, Spain
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Abstract

CdS-silica xerogel composites were prepared from tetramethoxysilane, acidic water, and formamide mixtures homogenized by high power ultrasounds. Different concentrations of Cd(NO3)2 were added. CdS semiconductor nanoparticles were precipitated by H2S gas diffusion through the sonogel porous structure. Composite mechanical properties were enhanced by an impregnation process by the gel soaking in the same sol as-prepared. Textural parameters evolution is compared to the salt content in order to find the best performance to CdS nanocrystal growth. The impregnation process allows a better composite protection.

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Type
Articles
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Journal of Materials Research , Volume 9 , Issue 11 , November 1994, pp. 2873 - 2877
Copyright
Copyright © Materials Research Society 1994

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References

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