The polyacrylonitrile (PAN) nanofiber membrane prepared by the electrospinning technology was used as the matrix, and β-cyclodextrin (β-CD) was introduced into it to synthesize the composite nanofiber membrane. Taking methylene blue as the object, the adsorption performance of nanofiber membranes for dyes in the aqueous solution was studied. The structure, morphology, and specific surface area of the nanofiber membrane were characterized using FTIR, SEM, BET, XRD, and EDS. Meantime, the adsorption equilibrium was also explored. After being modified by cyclodextrin, a large number of cavity structures and hydrophobic binding sites were provided for the nanofiber membrane, and the adsorption performance was significantly improved. The results showed that the maximum adsorption capacity of the PAN/β-CD blend nanofiber membrane (at 25℃) for methylene blue was 108.66 mg g −1 . The effects of pH, adsorption time, ion concentration, and adsorbent dosage on the adsorption capacity were also investigated. In addition, by fitting with the adsorption model, the adsorption process was more complex with the quasi-secondary adsorption kinetics and Langmuir isotherm adsorption model. Graphical abstract Preparation and adsorption process of PAN/β-CD nanofiber membranes.

中文翻译：

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电纺PAN /β-CD纳米纤维膜去除水中的亚甲基蓝

以静电纺丝技术制备的聚丙烯腈（PAN）纳米纤维膜为基质，并引入β-环糊精（β-CD）合成复合纳米纤维膜。以亚甲基蓝为研究对象，研究了纳米纤维膜对染料在水溶液中的吸附性能。使用FTIR，SEM，BET，XRD和EDS对纳米纤维膜的结构，形态和比表面积进行了表征。同时，还研究了吸附平衡。经环糊精改性后，为纳米纤维膜提供了大量的空穴结构和疏水结合位点，吸附性能得到明显提高。结果表明，PAN /β-CD共混纳米纤维膜（在25℃时）对亚甲基蓝的最大吸附能力为108.66 mg g -1。还研究了pH，吸附时间，离子浓度和吸附剂用量对吸附容量的影响。此外，通过拟合吸附模型，准二次吸附动力学和Langmuir等温吸附模型使吸附过程更加复杂。图形摘要PAN /β-CD纳米纤维膜的制备和吸附过程。准二级吸附动力学和Langmuir等温吸附模型对吸附过程的影响更为复杂。图形摘要PAN /β-CD纳米纤维膜的制备和吸附过程。准二级吸附动力学和Langmuir等温吸附模型对吸附过程的影响更为复杂。图形摘要PAN /β-CD纳米纤维膜的制备和吸附过程。