Preparation and Properties of Eu3+-Doped TiO2 Nanowires

Si Qin Zhao; Hong Liang Wan; S. Asuha

doi:10.4028/www.scientific.net/AMR.624.67

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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 624Preparation and Properties of Eu3+-Doped TiO2...

Preparation and Properties of Eu³⁺-Doped TiO₂ Nanowires

Abstract:

Nanowires of sodium titanate, TiO₂ and Eu³⁺/TiO₂ were synthesized by hydrothermal method, and their microstructure, optical properties and valence states of exterior elements were characterized by X-ray powder diffraction (XRD), scanning electron microscopy(SEM), X-ray photoelectron spectroscopy (XPS) and UV-Vis diffuse reflectance spectroscopy techniques. At the same time, the photocatalytic activities of the materials for degradation of methyl orange under visible-light irradiation were also investigated. The results showed the formation of nanowires of sodium titanate with average crystallite sizes of 50-200 nm and in lengths from several microns to several dozens microns, and its chemical formula was determined to be Na₂Ti₃O₇. TiO₂ and Eu³⁺ /TiO₂nanowires were prepared from the Na₂Ti₃O₇ nanowires via ion exchange (i.e., with H⁺ and Eu³⁺ ions) and high temperature sintering processes. These three kinds of nanowires showed different photocatalytic activities for degradation of methyl orange. Na₂Ti₃O₇ nanowire did not show any photocatalytic activity for methyl orange degradation, while TiO₂ nanowire was superior to Na₂Ti₃O₇ nanowire; and, Eu³⁺/ TiO₂ nanowire possessed the highest photocatalytic activity.

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Advanced Materials Research (Volume 624)

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67-71

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https://doi.org/10.4028/www.scientific.net/AMR.624.67

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Online since:

December 2012

Authors:

Si Qin Zhao, Hong Liang Wan, S. Asuha

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Eu³⁺ -Doped, Nanowire TiO₂, Photocatalytic Activity

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