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Journal of Materials Science
Published in: Journal of Materials Science 1/2019

27-08-2018 | Chemical routes to materials

Synthesis of gold particles at room temperature ionic liquid–ethylene glycol interfaces: effect of processing time and concentration

Authors: Chunli Lu, Peter Majewski

Published in: Journal of Materials Science | Issue 1/2019

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Abstract

Gold particles are produced at the interface between the ionic liquid methyltrioctylammonium bis(trifluoromethylsulfonyl)imide (N8,8,8,1 NTf2) and ethylene glycol at temperatures up to 180 °C, reaction times between 10 min and 4 h, and AuCl4− concentrations in N8,8,8,1 NTf2 between 0.5 and 8 mg/mL. When changing the concentration of AuCl4− in N8,8,8,1 NTf2, a sudden change in the shape of the particles can be observed from mainly porous agglomerated of gold nanoparticles to polyhedral particles and hexagonal plates of gold independent of the synthesis temperature. At a AuCl4− concentration in N8,8,8,1 NTf2 of 2 mg/mL, the formation of a porous framework of nanoparticles can be observed during reaction times between 10 min and 4 h. The results indicate that controlling the synthesis temperature, reaction, and AuCl4− concentrations in N8,8,8,1 NTf2 allows the formation of gold particles at the interface between N8,8,8,1 NTf2 and ethylene glycol with tailored size, shape, and porosity. XPS studies of the particles indicate the existence of ionic components of the ionic liquid on the particles surface which may be a factor for the formation of particular shapes of the gold particles.
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Metadata
Title
Synthesis of gold particles at room temperature ionic liquid–ethylene glycol interfaces: effect of processing time and concentration
Authors
Chunli Lu
Peter Majewski
Publication date
27-08-2018
Publisher
Springer US
Published in
Journal of Materials Science / Issue 1/2019
Print ISSN: 0022-2461
Electronic ISSN: 1573-4803
DOI
https://doi.org/10.1007/s10853-018-2838-7

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