静电纺丝制备TiO2／PAN纳米纤维毡及其性能研究

采用超声波水解技术水解TiCl4制备纳米TiO2粒子，与聚丙烯腈（PAN）的N，N-二甲基甲酰胺（DMF）溶液共混后，通过静电纺丝制得具有光催化活性的TiO2／PAN纳米纤维毡，并用其对模拟废水中苯酚进行光催化降解实验。X射线衍射（XRD）表征结果显示制备的TiO2为锐钛矿。用场发射扫描电镜（FE—sEM）观察纤维毡的形态，显示纤维的直径随纺丝液浓度增大而增大。对苯酚进行光催化降解结果表明：纺丝液浓度质量分数为5％TiO2／PAN纤维毡对苯酚的降解率最高，对100mg／L，50mg／L和20mg／L苯酚的降解率分别为51．1％，87．5％和99．6％。纤维毡循环使用5次后对于20mg／L苯酚的降解率为87．4％。

Prep-aration and Photocatalysis of TiO_2 NanoparticleDoped in Electrospun Polyacrylonitrile Nanofiber Mats

Nanosized TiO2 was obtained by the hydrolysis of TiCl4 under the irradiation of ultrasonication.The TiO2 nanoparticles were mixed with solution of polyacrylonitrile(PAN)/N,N-dimethyl-formamide(DMF)and then TiO2/PAN nanofiber mats were frabricated by electrospinning method.The TiO2/PAN nanofiber mats were used for photocatalytic degradation of phenol in simulation wastewater.The crystal type of TiO2 nanoparticles were characterized by X-ray diffraction(XRD)and the morphology of TiO2/PAN nanofibers were chara...