ZnSe/聚合物纤维纳米复合物结构及发光特性

Structure and photoluminescence property of ZnSe/polymer fiber nanocomposites

将甲基丙烯酸甲酯、甲基丙烯酸丁酯、丙烯酸三元共聚物与聚丙烯腈共混,通过静电纺制得聚合物纳米纤维;将Zn^2＋通过配位与聚合物中的羧酸根阴离子结合,与NaHSe溶液中的Se源反应,在聚合物纳米纤维表面生长出ZnSe纳米粒子。使用场发射扫描电子显微镜、X射线光电子能谱（XPS）、荧光光谱仪对ZnSe/聚合物纳米复合材料进行表征,结果表明,ZnSe纳米粒子直径为20-60 nm;Zn与Se的原子数之比为3∶1;在波长为260 nm的光激发下,ZnSe/聚合物纤维纳米复合材料发射光谱的峰值为396 nm,与ZnSe的本征发射带468 nm相比,产生了约70 nm的蓝移。

Nanofibers of PAN and MMA-BMA-AA copolymer with carboxylic group were obtained by electrospinning.Zinc ions were introduced to coordinate with carboxylic group,and ZnSe nanoparticles were well-proportionately distributed on the surface of PAN and MMA-BMA-AA nanofibers using the NaHSe aqueous solution as the Se source.The samples were characterized by X-ray photoelectron spectrometer（XPS）,scanning electron microscopy（SEM）,and fluorescence.The results show that the diameter of ZnSe nanoparticles ranges from 20 to 60nm,the ratio of the number of Zn atoms to that of Se atoms is 3 to 1,and the peak value of the emission spectrum of the nanocomposites at an excitation wavelength of 260 nm is 396 nm at room temperature,which shows a 70 nm blue shift in respect to bulk ZnSe of 468 nm.