Preparation of gold, silver and platinum colloid solutions by precursors decomposition in low temperature plasma

0394011 - ÚFP 2014 CZ eng C - Conference Paper (international conference)
Brožek, Vlastimil - Kutílek, Zdeněk - Mastný, L. - Sýkora, V. - Benešová, L. - Sofer, Z.
Preparation of gold, silver and platinum colloid solutions by precursors decomposition in low temperature plasma.
Proceedings - International Conference on Chemical Technology – ICCT 2013. Praha: Česká společnost průmyslové chemie, 2013, 20 P 31-20 P 31. ISBN 1978-80-86238-37-1.
[International Conference on Chemical Technology – ICCT 2013. Mikulov (CZ), 08.04.2013-10.04.2013]
Institutional support: RVO:61389021
Keywords : colloidal suspension * gold nanoparticles * silver nanoparticles * platinum nanoparticles * plasma generator * low temperature plasma
Subject RIV: JK - Corrosion ; Surface Treatment of Materials
www.icct.cz

Liquid precursor decomposition in the low temperature plasma generated by WSP® was used for synthesis of precious metals nanoparticles. The gold in the form of H[AuCl4], silver in the form of AgNO3 and platinum in the form of H2[PtCl6] were used to generate colloid solutions with concentration of 5 mg.l-1 – 70 mg.l-1 and particle size of 20 nm – 120 nm. The solution contained elevated concentration of nitrite and nitrate ions due to the reaction of plasma with nitrogen form air. In order to reduce the concentration of nitrite and nitrate ions the plasma generated nanoparticles was projected by plasma torch to the ammonium chloride solution. Other way used for reduction of NO3- and NO2- concentration was optimization of geometry of plasma system. The other way was also by application of shrouding effect by nitrogen and ammonia gas. The size of nanoparticles and their concentration can be influenced by geometry of plasma torch, composition of carrier gas and by geometry of
Permanent Link: http://hdl.handle.net/11104/0222347