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Truncated hexagonal bi-pyramidal gallium ferrite nanocrystals: integration of structural details with visible-light photo-activity and self-cleaning properties

Abstract

We report the growth of gallium ferrite (GaFeO3 or GFO) nanocrystals with unique morphology, “truncated hexagonal bi-pyramid” (THBP) with novel orthorhombic P212121 symmetry under hydrothermal condition in pure water without using any reducing or shape defining reagent. The growth condition of such structure is optimized through a detailed study using field emission scanning electron microscopy. Structural details of the above hitherto unreported phase of the material is studied using room temperature powder x-ray diffraction (XRD), Raman spectroscopy, high resolution transmission electron microscopy and ab-initio electronic structure calculations. In light of the above structural characterization, possible mechanism for formation of the specific shape of hexagonal bi-pyramid is discussed. Our investigations on optical, photocatalytical and wetting characteristics of the as-grown nanocrystals demonstrate visible light photocatalysis as well as super-hydrophilic behavior. The material is poised to establish itself as a new class of “self-cleaning” material.

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Publication details

The article was received on 25 Mar 2018, accepted on 16 May 2018 and first published on 16 May 2018


Article type: Paper
DOI: 10.1039/C8TA02749H
Citation: J. Mater. Chem. A, 2018, Accepted Manuscript
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    Truncated hexagonal bi-pyramidal gallium ferrite nanocrystals: integration of structural details with visible-light photo-activity and self-cleaning properties

    M. Mishra, I. Thakur, A. K. Mall, A. Mitra, S. Dash, S. Chatterjee, S. Mukherjee and A. Roy, J. Mater. Chem. A, 2018, Accepted Manuscript , DOI: 10.1039/C8TA02749H

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