Effect of manganese doping on the structure, optical and photocatalytic properties of mesoporous TiO2 films

  • I. Petrik Chuiko Institute of Surface Chemistry of National Academy of Sciences of Ukraine
  • N. Smirnova Chuiko Institute of Surface Chemistry of National Academy of Sciences of Ukraine
  • A. Eremenko Chuiko Institute of Surface Chemistry of National Academy of Sciences of Ukraine
  • O. Frolova Institute of Physics of National Academy of Sciences of Ukraine
  • O. Fesenko Institute of Physics of National Academy of Sciences of Ukraine
  • S. Kovalchuk Institute of Physics of National Academy of Sciences of Ukraine

Abstract

Homogeneous, optically transparent mesoporous titania films modified with Mnn+ ions have been produced by templated sol-gel method and characterized by optical, XRD and Raman spectroscopy. Catalytic activity of prepared films have been tested in the Cr(VI) anion photoreduction. Dopant amount  was varied from 0.5 to 20 atomic%. Doping with Mn ions leads to bathochromic shift of the absorption edge and to the band gap decrease from 3.3eV (TiO2), 3.0 (5%Mn/TiO2) up to 2.6 eV for 20 % Mn/TiO2. The increase of the dopant concentration up to 20 % resulted in refractive index growing to a value of 2.6, which can be caused by the formation of a new phase in the coverage structure, or reducing the film porosity. Also, the Mn2+ content affects the crystalline structure of TiO2 lowering the anatase-rutile phase transition temperature of the films.

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Published
2017-10-08
How to Cite
Petrik, I., Smirnova, N., Eremenko, A., Frolova, O., Fesenko, O., & Kovalchuk, S. (2017). Effect of manganese doping on the structure, optical and photocatalytic properties of mesoporous TiO2 films. Surface, (9(24), 156-164. https://doi.org/10.15407/Surface.2017.09.156
Section
Nanomaterials and nanotechnologies