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Title
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Hematite iron oxide nanorod patterning inside COK-12 mesochannels as an efficient visible light photocatalyst
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Author
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Abstract
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| The uniform dispersion of functional oxide nanoparticles inside ordered mesoporous silica to tailor optical, electronic, and magnetic properties for biomedical and environmental applications is a scientific challenge. Herein, we demonstrate for the very first time the morphological effect of platelet-driven confined growth of hematite iron oxide (alpha-Fe2O3) nanorods inside the mesochannels of ordered mesoporous silica COK-12 material denoted as alpha-Fe2O3@COK-12. The inclusion of the alpha-Fe2O3 nanorods in COK-12 particles is studied in detail using high-angle annular dark field scanning transmission electron microscopy (HAADF-STEM), energy-dispersive X-ray (EDX) spectroscopy and electron tomography. High resolution imaging and EDX spectroscopy provide information about the particle size, shape and crystal phase of the loaded alpha-Fe2O3 material, while electron tomography provides detailed information on the spreading of the nanorods throughout the COK-12 host in three-dimension. This nanocomposite material, having a semiconductor band gap energy of 2.50 eV according to diffuse reflectance spectroscopy, demonstrates an improved visible light photocatalytic degradation activity with rhodamine 6G and 1-adamantanol model compounds. |
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Language
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English
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Source (journal)
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Journal of materials chemistry A : materials for energy and sustainability / Royal Society of Chemistry [London] - Cambridge, 2013, currens
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Publication
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Cambridge
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2015
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ISSN
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2050-7488
[print]
2050-7496
[online]
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DOI
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10.1039/C5TA05075H
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Volume/pages
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3
:39
(2015)
, p. 19884-19891
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ISI
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000362041300033
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Full text (Publisher's DOI)
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Full text (open access)
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