Microstructural and photocatatlytic properties of Eu-doped mesporous titanium dioxide nanopaticles by sol–gel method
- National Laboratory of Mineral Materials, School of Materials Sciences and Technology, University of Geosciences, Beijing 100083 (China)
Highlights: ► Eu-doped TiO{sub 2} was prepared using sol–gel method in the presence of pluronic P123. ► Eu atoms were doped into the lattice of anatase TiO{sub 2}. ► Eu doping can increase the band gap of TiO{sub 2}. ► Eu-doped TiO{sub 2} exhibited much higher photocatalytic activity than undoped TiO{sub 2}. -- Abstract: The europium-doped mesoporous titanium dioxide nanoparticles (Eu-doped TiO{sub 2}) with the different Eu/Ti rations were prepared using sol–gel method in the presence of tir-block copolymer pluronic P123. The as-prepared catalysts were characterized by low-angle and wide-angle X-ray diffraction (XRD), high resolution transmission electron microscopy (HRTEM), N{sub 2} absorption–desorption, ultraviolet visible light spectroscopy (UV–vis) and X-ray photoelectron spectroscopy (XPS), respectively. The XRD analysis indicated that all as-prepared TiO{sub 2} samples were mainly anatase phase and mesoporous. The crystallite sizes were in the range 6–11 nm, in consistent with the results obtained form TEM images. HRTEM and XPS showed that the europium atoms were doped into the lattice of anatase TiO{sub 2}. Eu doping can not only increase the stability of mesoporous TiO{sub 2}, but also make the absorption edge position move toward shorter wavelength. The photodecomposition experiments showed that the photodegradation activity of Eu-doped TiO{sub 2} was higher than that of undoped TiO{sub 2}.
- OSTI ID:
- 22215546
- Journal Information:
- Materials Research Bulletin, Vol. 47, Issue 11; Other Information: Copyright (c) 2012 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); ISSN 0025-5408
- Country of Publication:
- United States
- Language:
- English
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