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Abstrakty
In the present study, reaction crystallization of silver micron and nanoparticles was studied in a batch crystallizer in two different set of experiments by reducing silver in the presence or absence of sodium citrate. From the experimental determination of crystalsize distribution, and with the aid of a mathematical model of the process, nucleation and growth kinetics of silver nanoparticles were de termined. Kinetic parameters were determined by fitting the power law expression to the experimental data. Nanoparticle growth rates indicate a diffusion controlled mechanism with a first order dependence on supersaturation, while the observed low dependence of nucleation rate on magma density imply the primary nucleation occurring. Never the less, in the synthesis of micron particles magma density was important and agglomeration took place and nucleation, volume crystal growth rates as well as agglomeration kernel were determined.
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Tom
Strony
625--639
Opis fizyczny
Bibliogr. 16 poz., rys.
Twórcy
autor
autor
- Department of Chemical Engineering, Faculty of Engineering, Tarbiat Modares University, Jalal-Al-Ahmad High way, P.O. Box 14115-143, Tehran, Iran, manteghi@modares.ac.ir
Bibliografia
- 1. Kramer H.J.M, Bermingham S.K. and van Rosmalen G.M, J. Cryst. Growth, 198-199, 729 (1999).
- 2. Jones A.G., Hostomsky J. and Wachi S, Chem. Eng. Comm., 146, 105 (1996).
- 3. Shiraishi Y. and ToshimaN., J. Mol. Catal. A: Chem., 141, 187 (1999).
- 4. Sondi I. and Salopek-Sondi B, J. Colloid Interface Sci., 275, 177 (2004).
- 5. Nie S. and Emory S.R, Science, 275, 1102 (1997).
- 6. El-Sayed M.A, Acc. Chem. Res., 34, 257 (2001).
- 7. Haes A.J. and Van Duyne R.P., J. Am. Chem. Soc, 124, 10596 (2002).
- 8. Henglein A., Chem. Mater, 10, 444 (1998).
- 9. Rodriguez-Sanchez L, Blanco M.C. and Lopez-Quintela M.A, J. Phys. Chem. B, 104, 9683 (2000).
- 10. Van Hyning D.L. and Zukoski C.R, Langmuir, 14, 7034 (1998).
- 11. Mullin J.W, Crystallization, 4th ed, Butterworth - Heinemann, Oxford (2001).
- 12. Bramley A.S, Hounslow M.J. and Ryall R.L, J. Coll. Sci., 183, 155 (1996).
- 13. Tavare N.S, Industrial Crystallization: Process Simulation Analysis and Design, Plenum Press, New York (1992).
- 14. Rushton J.H, Costich E.W. and Everett H.J, Chem. Eng. Prog., 46, 395 (1950).
- 15. Chappie D., Kresta S.M, Wall A. and Afacan A, Chem. Eng. Res. Design, 80, Part A, 364 (2002).
- 16. Mersmann A, Crystallization Technology Handbook, Marcel Dekker, New York (1995).
Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-article-BUJ7-0015-0012