Degradation of dye wastewater by anatase TiO2 modified with rare earth Erbium
The development of a highly active photocatalyst,Er@R-TiO2,has been achieved through the regulation of lattice defects in anatase TiO2 doped with rare earth element Erbium(Er).Raman spectra analysis confirmed that the Er@R-TiO2 composite was in the anatase phase,while FT-IR and PL spectra demonstrate that the composite could efficiently utilize sunlight,enhancing its photocatalytic performance.The experiment on Er@R-TiO2 the dosage ratio of doped substances in photocatalytic composite materials has been optimized[n(Er)∶n(Ti)=1.5∶100.0].The photocatalytic degradation efficiency of the Er@R-TiO2 composite was evaluated using simulated wastewater containing rose red B dye and exposed to solar radiation(ultraviolet and visible light irradiation).After 90 min of ultraviolet light and 240 min of visible light irradiation,the Er@R-TiO2 photocat-alytic composite was able to completely degrade the rose red B dye,with degradation rates of 99.5%and 92.3%,respectively.
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