This paper reports the red visible luminescence of ZnO nanofibers synthesized by electrospinning followed by thermal annealing. The ZnO nanofibers were prepared by electrospinning of the precursor mixture of zinc acetate/polyvinylpyrrolidone (PVP) by using different PVP concentrations, while thermal annealing was kept at 600oC. The ZnO nanofiber diameter was dependent on the PVP concentrations, which increased as PVP concentrations increased. Thermal annealing induced significant changes in ZnO nanofibers, which formed ZnO nanoparticle/nanofiber structures as a function of PVP concentrations. The ZnO nanofibers synthesized with PVP concentration of 20% induced homogeneous distribution of ZnO nanoparticles with highly visible luminescence intensities centering at ~650 nm. Results indicated that the use of electrospinning followed by thermal annealing could be an important method for the synthesis of ZnO nanoparticle/nanofiber structures, which could be used in advanced engineering such as optoelectronics and sensing.

本文报道了通过静电纺丝和热退火合成的 ZnO 纳米纤维的红色可见光发光。ZnO 纳米纤维是通过使用不同的 PVP 浓度对醋酸锌/聚乙烯吡咯烷酮 (PVP) 的前体混合物进行静电纺丝而制备的，同时热退火保持在 600oC。ZnO 纳米纤维直径取决于 PVP 浓度，随着 PVP 浓度的增加而增加。热退火引起 ZnO 纳米纤维的显着变化，形成 ZnO 纳米颗粒/纳米纤维结构作为 PVP 浓度的函数。以 20% 的 PVP 浓度合成的 ZnO 纳米纤维诱导了 ZnO 纳米粒子的均匀分布，具有以~650 nm 为中心的高度可见的发光强度。