多次交替浸渍法构筑簇状ZnO的PAN复合纳米纤维膜及其光催化性能  

Anchoring ZnO Clusters on PAN Nanofiber Membrane by Multiple Impregnation Method and Its Photocatalytic Performance

作　　者：李霞[1] 余厚咏[1] 周颖[1] 胡国樑[1] LIXia YU Hou-yong ZHOU Ying HU Guo-liang(Key Laboratory of Advanced Textile Materials and Manufacturing Technology of Ministry of Education,College of Materials and Textile,Zhejiang Sci-Tech University, Hangzhou 310018,China)

机构地区：[1]浙江理工大学材料与纺织学院,先进纺织材料与制备技术教育部重点实验室,杭州310018

出　　处：《功能高分子学报》2016年第4期404-410,共7页Journal of Functional Polymers

基　　金：国家自然科学基金(51403187);浙江省科技厅公益项目(2015C33111)

摘　　要：以聚丙烯腈(PAN)与氯化锌(ZnCl2)作为前驱物,采用静电纺丝工艺制备PAN/ZnCl_2复合纳米纤维膜,分别采用多次冷热交替浸渍法和单次冷热静置浸渍法得到簇状PAN/ZnO-1和PAN/ZnO-2复合纳米纤维膜。利用扫描电镜(SEM)、傅里叶红外光谱(FT-IR)、X射线衍射(XRD)、X射线能量色散光谱(XPS)和热重分析仪(TG)对复合纳米纤维膜的表面形貌和微结构进行了表征,并以亚甲基蓝(MB)为污染物模型,评价其光催化降解性能。结果表明:经冷热交替浸渍后,纳米ZnO粒子均匀地附着在PAN纤维表面,尤其在PAN/ZnO-1复合纳米纤维膜表面还出现了花状ZnO粒子;相比单次冷热静置浸渍法处理的PAN/ZnO-2复合纳米纤维膜,经多次冷热交替浸渍的PAN/ZnO-1复合纳米纤维膜循环使用3次后对MB的降解率仍可达到90%以上,具有更好的光催化活性和循环使用性能。同时,MB溶液的初始质量浓度、催化剂用量和染料溶液的pH等因素对样品的的光催化降解率有一定影响。The polyacrylonitrile（PAN）/ZnCl2 nanofiber membrane was prepared by electrospinning, which could act as precursors to fabricate different ZnO clusters of PAN/Zn 〇-1 and P A N / Z n〇-2 nanofiber membranes by repeatedly alternating immersion method and single hot/cold impregnation method, respectively. The morphology and microstructure of the nanofiber membranes were characterized by utilizing Scanning Electron Microscope （ SEM ） , Fourier Infrared spectrum （ FT-IR ） , X-Ray Diffraction （XRD）,X-ray energy dispersive spectroscopy （XPS） , and Thermal Gravimetric analyzer（TG）. Moreover, methylene blue （MB） was taken as a pollutant model to evaluate the photocatalytic degradation performance of the nanofiber membranes. Results indicated that nanoscaled ZnO clusters were anchored on the surface of PAN fiber by impregnation. Especially, flower-like ZnO particles emerged in the surface of PAN/Zn〇-1 nanofibers membrane. And after three cycles, the degradation rate of PAN/Zn 〇-1 was more than 90%. It is indicated that photocatalytic activity and recycling performance of PAN/Zn 〇-lwere better than those of PAN/Zn 〇-2. And such factors had influence on the degradation rate of the nanofiber membranes , such as the initial concentration of MB solution, the amount of catalyst and the pH value of dye solution.

关 键 词：静电纺丝 聚丙烯腈 簇状氧化锌 光催化 

分 类 号：O63[理学—高分子化学]