Issue 30, 2018

Macroscale precipitation kinetics: towards complex precipitate structure design

Abstract

Producing self-assembled inorganic precipitate micro- and macro-structures with tailored properties may pave the way for new possibilities in, e.g., materials science and the pharmaceutical industry. One set of important parameters to maintain appropriate control over the yield falls in the frame of reaction kinetics, which affects the possible coupling between hydrodynamics and chemical reactions under flow conditions. In this study, we present a spectrophotometric method to experimentally determine the characteristic timescales of precipitation reactions. It is also shown that the nickel–oxalate model system – despite the fast chemical complexation equilibria taking place – can be kinetically described by either Classical Nucleation Theory or the classical homogeneous kinetics approach. The applicability of our results is illustrated via injection experiments intrinsically exhibiting coupling between chemistry and hydrodynamics. Therefore, we suggest that easy-to-handle power law functions may be applied to characterize the precipitation kinetics in flow systems.

Graphical abstract: Macroscale precipitation kinetics: towards complex precipitate structure design

Article information

Article type
Paper
Submitted
20 Mar 2018
Accepted
17 May 2018
First published
17 May 2018
This article is Open Access
Creative Commons BY license

Phys. Chem. Chem. Phys., 2018,20, 19768-19775

Macroscale precipitation kinetics: towards complex precipitate structure design

N. P. Das, B. Müller, Á. Tóth, D. Horváth and G. Schuszter, Phys. Chem. Chem. Phys., 2018, 20, 19768 DOI: 10.1039/C8CP01798K

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