Reserach Of Preparationand Photocatalytic Of TiO₂Nanofibersmaterials

Based on the combining of electrospinning and sol-gel method,TiO₂of different structureswas obtained,the best condition to synthesize TiO₂owning the highest photocatalytic activity wasexplored,The main contents are as follows.（1）TiO₂nanofibers photocatalyst was synthesized via electrospinning and sol-gelmethod.The obtained samples were characterized by scanning electron microscopy （SEM）,X-ray diffraction （XRD）.The photocatalytic activity of the obtained nanofibers photocatalyst wasexplored by degradating of Methylene blue （MB） by irradiation of ultraviolet lamp.The resultsshow thatTiO₂nanofibers showing a higher photocatalytic property calcined at550oC.（2）La/TiO₂composite nanofibers calcined by different temperature were synthesized viasol-gel and electrospinning method. The obtained samples were characterized by scanningelectron microscopy （SEM）, X-ray diffraction （XRD）. Methylene blue （MB） were degradated byLa/TiO₂composite nanofibers irradiated by ultraviolet lamp to explore the photocatalytic activityof the obtained nanofibers photocatalyst. The results show that La/TiO₂composite nanofibers byelectrospinning have a higher photocatalytic property and La/TiO₂composite nano bers calcinedat550oC have the best photocatalytic property.（3）magnetically separable TiO₂/BaFe₁₂O₁₉nanofibers photocatalyst was prepared by sol-geland electrospinning method. and it can be recycled after photocatalysis. The synthesisednanofibers were characterized by scanning electron microscopy （SEM）, X-ray diffraction （XRD）,vibrating sample magnetometer （VSM）. Methylene blue （MB） was used as a model organiccompound to evaluate the photocatalytic property and recyclability of the fabricatedsamples.simultaneously, the best initial concentration of methylene blue （MB） forTiO₂/BaFe₁₂O₁₉nanofibers photocatalyst system were explored. The result shows that TiO₂/BaFe₁₂O₁₉nanofibers photocatalyst not only performanced good photocatalytic activityunder UV light irradiation, but also own strong magnetic force. Furthermore,it presented almostthe same photocatalytic activity as the photocatalyst used in the first recycle time, the recoveryrate was maintained at a high level of above90%.