Title: Development of polyol method for the synthesis of concentrated colloids of PVP-stabilised Ru nanoparticles

Authors: Irina Simakova; Yuliya Demidova; Igor Prosvirin; Dmitry Yu. Murzin; Andrey Simakov

Addresses: Boreskov Institute of Catalysis, pr. Lavrentieva, 5, 630090 Novosibirsk, Russia; Novosibirsk State University, Pirogova, 2, 630090 Novosibirsk, Russia ' Boreskov Institute of Catalysis, pr. Lavrentieva, 5, 630090 Novosibirsk, Russia; Novosibirsk State University, Pirogova, 2, 630090 Novosibirsk, Russia ' Boreskov Institute of Catalysis, pr. Lavrentieva, 5, 630090 Novosibirsk, Russia; Novosibirsk State University, Pirogova, 2, 630090 Novosibirsk, Russia ' Process Chemistry Centre, Åbo Akademi University, FI-20500, Turku/Åbo, Finland ' Centro de Nanociencias y Nanotecnología, Universidad Nacional Autónoma de México, Km. 107 Carretera Tijuana a Ensenada, C.P. 22860, Ensenada, Baja California, México

Abstract: In the current work narrowly distributed and stable Ru nanoparticles (NPs) with mean diameters within 1.7 to 2.8 nm interval were prepared by reduction of RuCl₃ with ethylene glycol (EG) as a solvent and a reducing agent as well as polyvinylpyrrolidone (PVP) as a stabiliser in the temperature range from 170°C to 198°C. Besides a typical polyol technique, Ru NPs synthesis using microwaves as well as sodium borohydride reduction at room temperature was applied as an effective alternative approach. The effect of heating conditions, Ru/PVP ratio, reducing agent and metal precursor concentrations on the particle size was studied. Microstructure of Ru NPs was characterised by UV Vis, XPS and HRTEM. Higher PVP/Ru ratios and reduction temperature gave slightly smaller nanoparticles with narrower size distributions, while no clear effect was observed when the initial ruthenium concentration was varied.

Keywords: Ru colloidal nanoparticles; ruthenium; polyol synthesis; reduction temperature effect; ethylene glycol; polyvinylpyrrolidone; PVP-Ru ratio; microwave assistance; nanotechnology; concentrated colloids; microstructure.

DOI: 10.1504/IJNT.2016.074520

International Journal of Nanotechnology, 2016 Vol.13 No.1/2/3, pp.15 - 27

Published online: 04 Feb 2016 *

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