Synthesis and characterization of Al-Fe-Cu tri-doped TiO2 by in-situ hydrothermal for degradation of methylene blue dyes

摘要

Pure TiCh and a series of Al-Fe-Cu tri-doped TiO2 were synthesized by using in-situ hydrothermal method. The synthesized materials were characterized using X-ray diffraction (XRD), Fourier Transform Infrared (FTIR) and Scanning Electron Microscope (SEM). The photocatalytic activity of the samples was evaluated for degradation of methylene blue (5mgL" 1) in aqueous solution under uv-visible light (k= <420 nm). The XRD pattern showed that all samples exhibited anatase phase after calcined at temperature 500°C with crystallite size in the range of 10.00-13.23 nm. The FTIR spectra showed three important vibrational modes for vOH, <50H and vTiO that were assigned at range 3411.75-3399.27 cm~(-1), 1626.911630.53 cm~(-1) and 503.30-530.93 cm~(-1), respectively. The degradation rate of Al_(lmmol)-Fe-Cu tri-doped TiO2 showed the highest photocatalytic degradation with 93% compared to pure TiO2, Al_(2 mmol)-Fe-Cu tri-doped TiCh and Al_(3mmol))-Fe-Cu tri-doped TiCh were calculated as 76%, 85% and 80%, respectively. Hence, it can be seen that, the amount of Al ion-doping have influence on the photocatalytic degradation.