期刊
CHEMNANOMAT
卷 6, 期 11, 页码 1617-1619出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cnma.202000371
关键词
Ta-Nb-O nanotubes; anodization; XPS; H(2)production; stability
资金
- American University in Cairo
We report on the first fabrication of vertically-oriented tantalum-niobium mixed oxide nanotube arrays (Ta-Nb-O NTs) via one-step anodization of Ta-Nb alloy sheet in NH4F-containing electrolytes. The synthesized Ta-Nb-O NTs were fully characterized via X-ray diffraction (XRD), field-emission scanning electron microscopy (FESEM), high-resolution transmission electron microscopy (HRTEM), and X-ray photoelectron spectroscopy (XPS). The prepared nanotubes have an average diameter of similar to 35 nm with a wall thickness similar to 15 nm and a length similar to 1.0 mu m. The photoactivity of the fabricated Ta-Nb-O NTs was tested toward the photocatalytic hydrogen production, revealing a steady rate with no indication of activity poisoning. The amount of hydrogen produced can be as high as 150 mu L/cm(2)after 5 h of illumination, which is much higher than that reported for most metal oxides. Therefore, the demonstrated platform of Ta-Nb-O nanotube arrays holds promise for a variety of solar energy applications.
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