Electrospun fibers are advanced supporting layers in water purification. Coating the fibers with polydopamine should increase the hydrophilicity and removal efficiency. Here, we report a simple method to fabricate an adsorbent based on polydopamine and electrospun fibers. Polyacrylonitrile and dopamine coelectrospun micro-/nanofibers were selected as supporting layer, and then self-polymerization of polydopamine was used to functionalize the fibers. The polyacrylonitrile/polydopamine micro-/nanofibers were characterized by scanning electron microscopy (SEM), Fourier transform infrared (FTIR) and contact angle. Hexavalent chromium Cr(VI) was then used to investigate the adsorption by fabricated fibers. Results show that the fibers display a super-hydrophilicity and relative excellent adsorption capacity q_m of 61.65 mg g⁻¹ of Cr(VI). This finding is explained by the occurrence of amino and hydroxyl groups of polydopamine, and by the porous fibrous morphology of the electrospinning.

电纺纤维是水净化中的高级支撑层。用聚多巴胺涂覆纤维应增加亲水性和去除效率。在这里，我们报告了一种简单的方法来制造基于聚多巴胺和电纺纤维的吸附剂。选择聚丙烯腈和多巴胺共纺微纤维/纳米纤维作为支撑层，然后使用聚多巴胺的自聚合功能对纤维进行功能化。聚丙烯腈/聚多巴胺微纤维/纳米纤维通过扫描电子显微镜（SEM），傅立叶变换红外光谱（FTIR）和接触角进行表征。然后使用六价铬Cr（VI）来研究人造纤维的吸附。结果表明，纤维表现出超亲水性和相对优异的吸附能力q _m61.65 mg g ^-1的Cr（VI）。该发现是由聚多巴胺的氨基和羟基的出现以及静电纺丝的多孔纤维形态所解释的。