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Ostwald ripening and control of Ag ion reduction degree by ammonium hydroxide in alcohol reduction process
- Authors
- Lee, Yunji; Oh, Seong-Geun
- Issue Date
- Jan-2015
- Publisher
- ELSEVIER SCIENCE INC
- Keywords
- Silver nanoparticles; Ostwald ripening; Alcohol reduction process; NH4OH effect
- Citation
- JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY, v.21, pp.768 - 771
- Indexed
- SCIE
SCOPUS
KCI
- Journal Title
- JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
- Volume
- 21
- Start Page
- 768
- End Page
- 771
- ISSN
- 1226-086X
- Abstract
- Highly concentrated silver colloidal solutions were synthesized via alcohol reduction process by adding ammonium hydroxide (NH4OH). NH4OH played a role of enhancing the conversion of silver ions to silver atoms by accelerating oxidation reaction of alcohol. Amount of converted Ag-0 affected particle size, size distribution, and particle concentration, and it was explained in the aspect of nucleation and growth steps. Also, in the middle of the reaction process, Ostwald ripening was observed in TEM image which has hardly been reported in metallic particles. Colloidal characteristics were analyzed by UV-vis spectrophotometer and TEM, and the degree of Ag+ reduction was determined by ISE. (C) 2014 The Korean Society of Industrial and Engineering Chemistry.
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Related Researcher
- Oh, Seong-Geun
- COLLEGE OF ENGINEERING (DEPARTMENT OF CHEMICAL ENGINEERING)