Preparation and Photocatalytic Properties of Eu-Doped TiO2 under Visible Light Irradiation

doi:10.7517/j.issn.1674-0475.2012.01.60

Abstract

Abstract: Eu-doped TiO₂ nano-particles had been prepared by sol-gel method and characterized by transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD) and UV-visible diffuse reflectance spectra (UV-Vis DRS). The results showed that the band gap of Eu-TiO₂ was narrower than that of TiO₂. Eu-TiO₂had photocatalytic activity. The effect of preparation conditions of orgaric compounds on the degradation of rhodamine B(RhB) was studied. The optimal conditions were pH 3, n_Eu/n_Ti=0.05% and calcination temperature 500 ℃. The degradation of rhodamine B (RhB) and salicylic acid (SA) under visible light irradiation were used as testing reactions to analyze the activity of Eu-TiO₂ with different loadings. The results showed that RhB and SA were effectively degraded and mineralized, and the degradation reaction was predominated by the hydroxyl radical (·OH).

Key words: Eu-doped, lattice expansion, photocatalysis

CLC Number:

ZHENG Yun, GU Yan, WANG Shu-lian, YANG Jing, LAN Tian-long, HUANG Ying-ping, ZHANG Ai-qing. Preparation and Photocatalytic Properties of Eu-Doped TiO₂ under Visible Light Irradiation[J]. Imaging Science and Photochemistry, 2012, 30(1): 60-70.

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Preparation and Photocatalytic Properties of Eu-Doped TiO₂ under Visible Light Irradiation

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