Study on highly responsive photocatalytic degradation of dyes by rare earth La doped TiO2 nanofibers
In order to improve the photocatalytic performance of TiO2 and investigate the effect of metal ion do-ping on photocatalytic performance of TiO2,the electrospinning technology and calcination process were used to prepare La3+/TiO2 nanofiber membrane.The morphology and structure of the material were characterized by SEM,XRD,FT-IR,and TG tests.With methylene blue as the target degradation agent,the mechanism of photocatalytic oxidation and degradation of dyes by La3+ modified TiO2 was further studied.The results showed that when the dye concentration was 10 mg/L and the concentration of La3+ doped modified TiO2 nanofibers was 15 mg/10 mL,the degradation rate was 63.41%after 10 minutes of catalysis,and 99.87%after 70 min of catalysis,which was 6.36%higher than the degradation rate of undoped TiO2 nanofibers.It can be seen that La3+ doping improves the photocatalytic degradation rate of TiO2,reducing the required time.
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