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Issue 7, 2014
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Influence of dimensions, inter-distance and crystallinity of titania nanotubes (TNTs) on their photocatalytic activity

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Abstract

The aim of this study is to explore the influence of structural parameters of titania nanotubes (TNTs) including pore diameters, length, nanotube inter-distance and crystallinity on their photocatalytic properties. TNTs were prepared under various experimental conditions of applied potential, anodization time and the electrolyte water content. The morphology and crystalline structures of the prepared TNTs were characterized using scanning electron microscopy (SEM) equipped with energy dispersive X-ray spectroscopy (EDX) and X-ray diffraction (XRD). The results showed that the nanotube length, diameters and nanotube inter-distance were significantly affected by different anodization conditions. The photocatalytic activities of the prepared TNTs were evaluated via the degradation of rhodamine B in aqueous solution under mercury–xenon (Hg(Xe)) lamp irradiation monitored by UV–visible spectroscopy. The influence of TNT structural properties including tube length, inter-tube distance and crystallinity on their photocatalytic activity was evaluated. It was found that TNTs with shorter and larger nanotube inter-distances have better degradation rates of rhodamine B than long tubes. Moreover, the TNTs annealed at 650 °C to produce an anatase–rutile mixture (86.5 and 13.5% respectively) exhibited higher photocatalytic activity than other TNTs annealed at 250 °C, 450 °C, and 850 °C.

Graphical abstract: Influence of dimensions, inter-distance and crystallinity of titania nanotubes (TNTs) on their photocatalytic activity

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Publication details

The article was received on 27 Dec 2013, accepted on 25 Mar 2014 and first published on 26 Mar 2014


Article type: Paper
DOI: 10.1039/C3CY01100C
Author version available: Download Author version (PDF)
Citation: Catal. Sci. Technol., 2014,4, 2091-2098
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    Influence of dimensions, inter-distance and crystallinity of titania nanotubes (TNTs) on their photocatalytic activity

    M. Alsawat, T. Altalhi, J. G. Shapter and D. Losic, Catal. Sci. Technol., 2014, 4, 2091
    DOI: 10.1039/C3CY01100C

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