期刊
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS
卷 196, 期 -, 页码 15-22出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.mseb.2015.02.010
关键词
Hematite; Ti-Nb-Zr-O; Nanotube arrays; Composite; Photocatalytic water splitting
资金
- Shanghai Pujiang Program [07pj14047]
Surface modification and doping of titanium dioxide (TiO2) nanotubes are efficient ways to obtain improved photosensitive characteristics. Here we report photocatalytic activity of alpha-Fe2O3 decorated Ti-Nb-Zr-O nanotube arrays. The Ti-Nb-Zr-O nanotube arrays were fabricated through anodization of Ti-Nb-Zr alloy in electrolytes of 1 M NaH2PO4 containing 0.5 wt% HF. X-ray diffraction (XRD), Raman spectroscopy and X-ray photoelectron spectroscopy (XPS) were used to characterize the heterojunction nanofilms. Nb- and Zr-doping could enhance the photocatalytic properties of the titanium oxide. However, more Zr-doping could lead to many defects that acted as recombination centers, which reduced the photocatalytic activity of the titanium oxide. The photocurrent density of the Ti-Nb-Zr-O nanotube photoanodes decorated with a small quantity of alpha-Fe2O3 could exhibit three times as high as that of the undoped TiO2 nanotube photoanodes. (c) 2015 Elsevier B.V. All rights
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