Issue 12, 2016

Synthesis of hierarchical iron oxide nanostructures from primary nanoparticles and their morphology control via hydrolysis

Abstract

Flower-like hierarchical iron oxide structures have attracted much research attention due to their large surface area, easy separation and re-use, and ability to adsorb toxic ions. However, harsh synthetic conditions such as the use of surfactants and autoclave reactors limit their broader application. Moreover, control over the porosity and morphology of such structures has not yet been investigated. Facile preparation of hierarchical Fe-glycolate particles is possible using pre-prepared (Fe, Ti) oxide nanoparticles without the use of surfactants or autoclave reactors as they act as both precursors and intermediate seeds for self-assembly. The porosity and morphology of the particles are controlled via variable rates of hydrolysis. Replacement of bulky glycolates with smaller water molecules induces surface area and porosity changes in the hierarchical structures. Hierarchical magnetite particles are obtained from the Fe-glycolate and hydrolyzed particles after reductive annealing, and exhibit different surface areas, porosities and magnetic properties. Porosity-controlled magnetites from hydrolyzed particles also show greater adsorption for removing toxic arsenate ions in water.

Graphical abstract: Synthesis of hierarchical iron oxide nanostructures from primary nanoparticles and their morphology control via hydrolysis

Supplementary files

Article information

Article type
Paper
Submitted
29 Dec 2015
Accepted
18 Feb 2016
First published
18 Feb 2016

CrystEngComm, 2016,18, 2155-2162

Synthesis of hierarchical iron oxide nanostructures from primary nanoparticles and their morphology control via hydrolysis

J. Lim, K. Sim and J. Lee, CrystEngComm, 2016, 18, 2155 DOI: 10.1039/C5CE02580J

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