Ostwald ripening and control of Ag ion reduction degree by ammonium hydroxide in alcohol reduction process

Lee, Yunji; Oh, Seong-Geun

doi:10.1016/j.jiec.2014.04.010

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Ostwald ripening and control of Ag ion reduction degree by ammonium hydroxide in alcohol reduction process

Lee, Yunji;
Oh, Seong-Geun

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13

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16

초록

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.

키워드

Silver nanoparticles; Ostwald ripening; Alcohol reduction process; NH4OH effect; SILVER NANOPARTICLES; ANTIBACTERIAL ACTIVITY; METAL NANOPARTICLES; OPTICAL-PROPERTIES; PLASMON RESONANCE; ESCHERICHIA-COLI; POLYOL PROCESS; PARTICLES; SHAPE; NANOCOMPOSITE

제목: Ostwald ripening and control of Ag ion reduction degree by ammonium hydroxide in alcohol reduction process

저자: Lee, Yunji; Oh, Seong-Geun

DOI: 10.1016/j.jiec.2014.04.010

발행일: 2015-01

유형: Article

저널명: Journal of Industrial and Engineering Chemistry

권: 21

페이지: 768 ~ 771