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Doping a metal (Ag, Al, Mn, Ni and Zn) on TiO2 nanotubes and its effect on Rhodamine B photocatalytic oxidation

  • Gao, Xinghua (Department of Environmental Engineering, School of Civil and Environmental Engineering, University of Science and Technology Beijing) ;
  • Zhou, Beihai (Department of Environmental Engineering, School of Civil and Environmental Engineering, University of Science and Technology Beijing) ;
  • Yuan, Rongfang (Department of Environmental Engineering, School of Civil and Environmental Engineering, University of Science and Technology Beijing)
  • 투고 : 2015.06.12
  • 심사 : 2015.08.31
  • 발행 : 2015.12.31

초록

The effects of ion-doping on $TiO_2$ nanotubes were investigated to obtain the optimal catalyst for the effective decomposition of Rhodamine B (RB) through UV photocatalytic oxidation process. Changing the calcination temperature, which changed the weight fractions of the anatase phase, the average crystallite sizes, the BET surface area, and the energy band gap of the catalyst, affected the photocatalytic activity of the catalyst. The ionic radius, valence state, and configuration of the dopant also affected the photocatalytic activity. The photocatalytic activities of the catalysts on RB removal increased when $Ag^+$, $Al^{3+}$ and $Zn^{2+}$ were doped into the $TiO_2$ nanotubes, whereas such activities decreased as a result of $Mn^{2+}$ or $Ni^{2+}$ doping. In the presence of $Zn^{2+}$-doped $TiO_2$ nanotubes calcined at $550^{\circ}C$, the removal efficiency of RB within 50 min was 98.7%.

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