Photocatalytic Decomposition of Methylene Blue with Lanthanum Doping TiO2 under Visible Light Irradiation

Guang Xiu Cao; Zhong Hou Zhang; Bin Zhai

doi:10.4028/www.scientific.net/AMR.734-737.2163

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 734-737Photocatalytic Decomposition of Methylene Blue...

Photocatalytic Decomposition of Methylene Blue with Lanthanum Doping TiO₂ under Visible Light Irradiation

Abstract:

Lanthanum doped TiO₂ powders were prepared by hydrolysis of titanium tetra-n-butyl oxide and La (NO₃)₃ in solution. The resulting powders were characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), UV-Vis absorption spectroscopy. The photocatalytic activities of doped samples were evaluated by the decomposition of methylene blue under visible light irradiation. The XRD results showed that the doping of lanthanum could not only efficiently inhibit the grain growth but also suppress the phase transition of anatase to rutile. UV-Vis spectroscopy of lanthanum doping TiO₂ indicated that the absorption onset red-shifted to the visible light region. XPS results revealed that La₂O₃ had formed which could enhance the surface area. The degradation rates of methylene blue verified that the visible light photocatalytic activity of TiO₂ has been enhanced by the doping of lanthanum.

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Advanced Materials Research (Volumes 734-737)

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2163-2167

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https://doi.org/10.4028/www.scientific.net/AMR.734-737.2163

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August 2013

Authors:

Guang Xiu Cao, Zhong Hou Zhang, Bin Zhai

Keywords:

Methylene Blue, Photocatalytic Activity, TiO₂, Visible Light

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