【摘 要】
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Rare earth ions La3+ and Eu3+ co-doped TiO2 photocatalyst (La-Eu/TiO2) was prepared by sol-gel method,and characterized by various techniques such as X-ray diff
【机 构】
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School of Chemical Engineering and Technology,Department of Nuclear Medicine
论文部分内容阅读
Rare earth ions La3+ and Eu3+ co-doped TiO2 photocatalyst (La-Eu/TiO2) was prepared by sol-gel method,and characterized by various techniques such as X-ray diffraction (XRD),specific surface area and porosity (BET and BJH),scanning electron microscopy (SEM),high resolution transmission electron microscopy (HRTEM),UV-vis diffuse reflectance spectroscopy (DRS) and X-ray photoelectron spectroscopy (XPS).The photocatalytic activity of the La-Eu/TiO2 was evaluated by the degradation of methylene blue (MB) under UV light irradiation.The catalyst had a relatively uniform particle diameter distribution in the range of 40-60 nm.When calcining at 600℃,the XRD patterns of La-Eu/TiO2 indicated the anatase phase,while the XPS patterns showed the Ti4+,La3+ and Eu3+ ions existence.The DRS spectra showed red shift in the band-gap transition.The experimental results of MB degradation demonstrated that the photocatalytic activity of La-Eu/TiO2 was significantly enhanced due to better separation of photogenerated electron-hole pairs.
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