期刊
MATERIALS LETTERS
卷 63, 期 23, 页码 2044-2046出版社
ELSEVIER
DOI: 10.1016/j.matlet.2009.06.043
关键词
Titania; Nanobelts; Semiconductors; Photocatalyst; Hydrothermal synthesis
资金
- National Natural Science Foundation of China [20876002]
- 973 projects [2006CB932605]
- Beijing Natural Science Foundation [2091002]
Bi-doped anatase TiO2 nanobelts were synthesized from layer-structural titanate nanobelts using two-step hydrothermal treatment approach. X-ray diffraction (XRD) patterns and transmission electron microscopic (TEM) images show that the doping of Bi3+ cations does not change the crystal structure and morphology of TiO2 nanobelts. The energy-dispersive X-ray (EDX) and inductively coupled plasma-mass spectrometry (ICP-MS) analytic results suggest that the doping cations mainly exist near the surface of the TiO2 nanobelts. The ultraviolet-visible (UV-vis) absorption spectra show that the absorption edge for the samples with Bi3+ has red shift as compared with that of undoped TiO2 nanobelts, and correspondingly, the photocatalytic degradation of methylene blue under visible-light illumination is enhanced with the increase of Bi-doping content. (C) 2009 Elsevier B.V. All rights reserved.
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