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Molecules 2015, 20(6), 10566-10581; doi:10.3390/molecules200610566

Continuous Polyol Synthesis of Metal and Metal Oxide Nanoparticles Using a Segmented Flow Tubular Reactor (SFTR)

1
Paul Scherrer Institut, Villigen PSI, CH-5232 Switzerland
2
Department of Materials, ETH Zürich, Vladimir-Prelog-Weg 5, CH-8093 Zurich, Switzerland
3
EMPA, Laboratory for Functional Polymers, Überlandstrasse 129, CH-8600 Dübendorf, Switzerland
4
Powder Technology Laboratory (LTP), EPFL, MXD 336 CH-1015 Lausanne, Switzerland
5
RMS Foundation, Bischmattstrasse 12, CH-2544 Bettlach, Switzerland
*
Author to whom correspondence should be addressed.
Academic Editor: Kerry Gilmore
Received: 12 May 2015 / Revised: 22 May 2015 / Accepted: 26 May 2015 / Published: 8 June 2015
(This article belongs to the Special Issue Recent Advances in Flow Chemistry)
View Full-Text   |   Download PDF [4824 KB, uploaded 8 June 2015]   |  

Abstract

Over the last years a new type of tubular plug flow reactor, the segmented flow tubular reactor (SFTR), has proven its versatility and robustness through the water-based synthesis of precipitates as varied as CaCO3, BaTiO3, Mn(1−x)NixC2O4·2H2O, YBa oxalates, copper oxalate, ZnS, ZnO, iron oxides, and TiO2 produced with a high powder quality (phase composition, particle size, and shape) and high reproducibility. The SFTR has been developed to overcome the classical problems of powder production scale-up from batch processes, which are mainly linked with mass and heat transfer. Recently, the SFTR concept has been further developed and applied for the synthesis of metals, metal oxides, and salts in form of nano- or micro-particles in organic solvents. This has been done by increasing the working temperature and modifying the particle carrying solvent. In this paper we summarize the experimental results for four materials prepared according to the polyol synthesis route combined with the SFTR. CeO2, Ni, Ag, and Ca3(PO4)2 nanoparticles (NPs) can be obtained with a production rate of about 1–10 g per h. The production was carried out for several hours with constant product quality. These findings further corroborate the reliability and versatility of the SFTR for high throughput powder production. View Full-Text
Keywords: segmented flow tubular reactor; SFTR; continuous polyol synthesis; continuous nanoparticle synthesis; ethylene glycol segmented flow tubular reactor; SFTR; continuous polyol synthesis; continuous nanoparticle synthesis; ethylene glycol
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Testino, A.; Pilger, F.; Lucchini, M.A.; Quinsaat, J.E.Q.; Stähli, C.; Bowen, P. Continuous Polyol Synthesis of Metal and Metal Oxide Nanoparticles Using a Segmented Flow Tubular Reactor (SFTR). Molecules 2015, 20, 10566-10581.

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