Pursuit of optimal synthetic conditions for obtaining colloidal zero-valent iron nanoparticles by scanning pulsed laser ablation in liquids

Author(s)
Ruth Lahoz, Eva Natividad, Alvaro Mayoral, Christian Rentenberger, Daniel Diaz-Fernandez, Eduardo J. Felix, Leonardo Soriano, Wolfgang Kautek, Oscar Bomati-Miguel
Abstract

Liquid-Assisted Pulsed Laser Ablation (LA-PLA) is a promising top-down method to directly synthesize colloidal dispersions of nanoparticles in a eco-friendly manner. However, the role of LA-PLA synthesis parameters is not yet fully agreed. This work seeks to optimize the production of nanoscale zero-valent iron (nZVI) particles suitable for biomedical or environmental applications using nanosecond LA-PLA on iron targets with different ablation media, laser and target scanning parameters. The use of alcohols as solvents produces iron-iron oxide core-shell nanoparticles with amorphous cores, except for a small crystalline fraction corresponding to the biggest core sizes. Decreasing carbon chain length and complexity leads to a thinning of the carbonaceous material coatings and an increase of the colloidal stability and the nanoparticle productivity. Moreover, a decrease of solvent density and surface tension allows obtaining reduced sizes and polydispersity values. Among, laser and scanning parameters, the pulse accumulation per spot displayed a clear effect in boosting size and productivity. As main outcome, aqueous dispersions with suitable colloidal properties are obtained, either by transferring to water of optimized nZVI particles produced in ethanol, or by direct formation of nZVI particles and in situ coating with hydrophilic molecules in aqueous solutions of these molecules. (C) 2019 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.

Organisation(s)
Physics of Nanostructured Materials, Department of Physical Chemistry
External organisation(s)
Universidad de Zaragoza, ShanghaiTech University, Universidad Autónoma de Madrid, University of Cádiz
Journal
Journal of Industrial and Engineering Chemistry
Volume
81
Pages
340-351
No. of pages
12
ISSN
1226-086X
DOI
https://doi.org/10.1016/j.jiec.2019.09.024
Publication date
01-2020
Peer reviewed
Yes
Austrian Fields of Science 2012
Nanomaterials, Spectroscopy
Keywords
Portal url
https://ucris.univie.ac.at/portal/en/publications/pursuit-of-optimal-synthetic-conditions-for-obtaining-colloidal-zerovalent-iron-nanoparticles-by-scanning-pulsed-laser-ablation-in-liquids(06ceda10-93f6-4420-a42c-6c8a562ba524).html