Low Temperature Preparation and Visible Light Induced Photocatalytic Activity of Europium Doped Hydrophobic Anatase TiO2–SiO2 Photocatalysts

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Abstract:

The Eu3+ doped TiO2–SiO2 photocatalysts, as a reclaimed visible-light responsive photocatalyst, were prepared by sol–gel method with TEOS, TBT and europium nitrate as precursors, by keeping the molar of TEOS:TBT constant at 1:1 and with different europium doping content. The resulting photocatalysts were characterized by XRD, TEM, SEM, EDX, UV-VIS DRS, FTIR and BET method. Analytical results demonstrated that only anatase phase is present in photocatalysts with high surface areas. The mean size is around 10 nm form TEM, which is consistent with the analytical result according to SEM. It can be seen methyl groups exist in photocatalysts based on analysis of FTIR and EDX. It was found that the resulting Eu3+ doped photocatalysts exhibit higher photocatalytic activity than undoped photocatalysts and P25 on the degradation of rhodamine B(RhB, 10 mg/l) in water under visible light irradiation ( > 410). After irradiation for 3 h, the maximum absorption decreases gradually with irradiation time and absorption band shifts from 554 to 507 nm.

Keywords: ANATASE; EU3+ DOPED TIO2/SIO2; HYDROPHOBILITY; LOW TEMPERATURE; PHOTOCATALYTIC DEGRADATION

Document Type: Research Article

DOI: http://dx.doi.org/10.1166/jnn.2010.2776

Publication date: November 1, 2010

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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