Controlling the spontaneous precipitation of silver nanoparticles in sol-gel materials

Citation
Pw. Wu et al., Controlling the spontaneous precipitation of silver nanoparticles in sol-gel materials, J SOL-GEL S, 19(1-3), 2000, pp. 249-252
Citations number
10
Categorie Soggetti
Material Science & Engineering
Journal title
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
ISSN journal
09280707 → ACNP
Volume
19
Issue
1-3
Year of publication
2000
Pages
249 - 252
Database
ISI
SICI code
0928-0707(200012)19:1-3<249:CTSPOS>2.0.ZU;2-D
Abstract
The mechanisms responsible for spontaneous silver precipitation in silver-d oped sol-gel materials are identified. The chemistry of the solvent phase i s found to be the critical factor in controlling this phenomenon. The addit ion of HCl as catalyst leads to the formation of AgCl and subsequent format ion of silver upon light exposure. Another factor leading to silver precipi tation is the reducing capability of methanol radicals. Silver precipitatio n is inhibited by simply washing out the pore solvents by a solvent exchang e method.