期刊
SURFACE ENGINEERING
卷 35, 期 7, 页码 635-642出版社
TAYLOR & FRANCIS LTD
DOI: 10.1080/02670844.2018.1558502
关键词
Micro-arc oxidation; TiO2; TiO2; Dy3+; impregnation; photocatalytic activity
资金
- Research on Public Welfare Technology Application Projects of Zhejiang Province [2017C31039]
- National Natural Science Foundation of China [51275477, 61572438]
TiO2 films were formed in phosphate-based electrolyte on pure titanium by micro-arc oxidation (MAO) technology. After that, they were impregnated with Dy3+-containing electrolyte to produce TiO2:Dy3+ composite films. Effects of the duty cycle, impregnation time and concentration on physical and chemical properties of TiO2 and TiO2:Dy3+ composite films were investigated by scanning electron microscopy (SEM), X-ray diffraction (XRD), energy-dispersive X-ray spectroscopy (EDS) and X-ray photoelectron spectroscopy (XPS). A UV-VIS spectrophotometer was used to study photocatalytic properties of both films. XPS results revealed that Ti 2p spin-orbit components of the TiO2:Dy3+ composite film are shifted towards higher binding energy, with respect to the TiO2 film, suggesting that some of the Dy3+ ions are incorporated into TiO2 lattice. The TiO2:Dy3+ composite films showed an obvious enhanced photocatalytic activity than that of the TiO2 film under UV-irradiation.
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