Dibenzo-18-crown-6 (DB18C6) as a host compound was doped into polyacrylonitrile (PAN) solution. The composite nanofibers (DB18C6/PAN) were prepared by the electrospinning. The morphology, chemical structure and thermal stability of nanofibers were characterized by field emission scanning electron microscope (FE-SEM), Fourier transform infrared spectroscopy (FT-IR), and thermal gravimetric analysis (TGA), respectively. The composite nanofibers with good morphology were obtained by controlling the weight percent of DB18C6 and electrospinning parameters. The static adsorption behavior of alkali metal ions and alkaline earth metal ions of different proportional DB18C6/PAN nanofibers were studied. DB18C6/PAN nanofibers have adsorptive selectivity about alkali metal ions: K⁺ > Na⁺ > > Cs⁺ > Li⁺. The 15wt%DB18C6/PAN nanofibers have the highest adsorption capacity. The adsorption kinetics of 15wt%DB18C6/PAN nanofibers for Na⁺ and K⁺ were accorded with the first-order equation, and the adsorption rate constants were 9.5 × 10^–3 min⁻¹ and 1.5 × 10^–2 min⁻¹, respectively. At 25 °C, the isotherm adsorption of the DB18C6/PAN nanofibers for Na⁺ and K⁺ was confirmed to the Langmuir adsorption isotherm, and the maximum adsorption quantities of 15wt%DB18C6/PAN nanofibers were 11.9 mg g⁻¹ and 24.8 mg g⁻¹, respectively.

Dibenzo-18-crown-6 (DB18C6) 作为主体化合物被掺杂到聚丙烯腈 (PAN) 溶液中。通过静电纺丝制备复合纳米纤维（DB18C6/PAN）。纳米纤维的形貌、化学结构和热稳定性分别通过场发射扫描电子显微镜 (FE-SEM)、傅里叶变换红外光谱 (FT-IR) 和热重分析 (TGA) 进行表征。通过控制DB18C6的重量百分比和静电纺丝参数，获得了具有良好形貌的复合纳米纤维。研究了不同比例DB18C6/PAN纳米纤维对碱金属离子和碱土金属离子的静态吸附行为。DB18C6/PAN纳米纤维对碱金属离子具有吸附选择性：K ⁺ > Na ⁺ > > Cs⁺ > 李⁺ . 15wt%DB18C6/PAN 纳米纤维具有最高的吸附能力。的吸附动力学15wt％的DB18C6 /的Na PAN纳米纤维⁺和K ⁺与第一阶方程被给予，和吸附速率常数分别为9.5×10 ^-3 分钟^-1和1.5×10 ^-2 分钟^-1，分别. 在 25 °C 时，DB18C6/PAN 纳米纤维对 Na ⁺和 K ⁺的等温吸附符合朗缪尔吸附等温线，15wt% DB18C6/PAN 纳米纤维的最大吸附量为 11.9 mg g ^-1和 24.8 mg g ^-1，分别。