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One-step synthesis and assembly of spindle-shaped akaganéite nanoparticles via sonochemistry

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Abstract

Akaganéite, with the formula FeO(OH,Cl), has potential in the realms of environmental protection, energy conversion/storage, and biomedicine. However, its large-scale production is still challenging in terms of cost and environmental friendliness, which limits its commercial application. In this study, we report a one-step sonochemical fabrication method to address this challenge. Fabrication has been performed in aqueous FeCl3 solutions with the aid of acoustic cavitation by gas bubbles. The fabricated FeO(OH,Cl) nanoparticles (NPs) are porous and exhibit spindle shapes. With increasing sonication time, these NPs can be spontaneously assembled to form irregular micro-/nanostructures of varied sizes. When required, such assemblies could be suitably directed by adding appropriate templates, either natural or artificial. The template-directed assembly relies on the principle of minimum free energy and the resulting FeO(OH,Cl) NPs nucleating and growing along the added templates. This study demonstrates a sonochemical fabrication method amenable to large-scale production, that is inexpensive and environmentally friendly, providing monodisperse porous FeO(OH,Cl) NPs of spindle shape and their various assemblies for commercial purposes.

Graphical abstract: One-step synthesis and assembly of spindle-shaped akaganéite nanoparticles via sonochemistry

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Publication details

The article was received on 27 Mar 2018, accepted on 06 May 2018 and first published on 08 May 2018


Article type: Paper
DOI: 10.1039/C8CE00470F
Citation: CrystEngComm, 2018, Advance Article
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    One-step synthesis and assembly of spindle-shaped akaganéite nanoparticles via sonochemistry

    W. Chen, P. Dai, C. Hong, C. Zheng, W. Wang and X. Yan, CrystEngComm, 2018, Advance Article , DOI: 10.1039/C8CE00470F

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