The g-titania functional additives were prepared via thiol-ene click chemical reaction, and then the polylactic acid/g-titania nanofiber membrane was prepared via electrospinning technology. Characterization via scanning electron microscopy and nitrogen adsorption/desorption showed that the average fiber diameter of the TP4 fiber membrane was 489 nm, the specific surface area was 34.69 m²·g⁻¹, and the average pore size was 22.31 nm. The adsorption mechanism, photocatalytic degradation performance, and reusability of polylactic acid/g-titania nanofibrous membranes were characterized. The results showed that the adsorption of methylene blue by TP4 nanofiber membrane followed a pseudo-second-order kinetic model, which could be represented by the Langmuir isotherm model, and the maximum adsorption capacity was 35.44 mg·g⁻¹. In addition, the photocatalytic degradation of methylene blue by TP4 nanofiber membrane followed a first-order kinetic model and exhibited high reusability. Therefore, polylactic acid/g-titania nanofiber membrane, as an efficient dye removal material, shows a good application prospect in wastewater treatment.

中文翻译：

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基于硫醇-烯点击化学的聚乳酸/g-二氧化钛静电纺丝膜的制备与性能

通过硫醇-烯点击化学反应制备g-二氧化钛功能添加剂，然后通过静电纺丝技术制备聚乳酸/g-二氧化钛纳米纤维膜。扫描电镜和氮气吸附/脱附表征表明，TP4纤维膜的平均纤维直径为489 nm，比表面积为34.69 m ² ·g ^-1, 平均孔径为 22.31 nm。表征了聚乳酸/g-二氧化钛纳米纤维膜的吸附机理、光催化降解性能和可重复使用性。结果表明，TP4纳米纤维膜对亚甲蓝的吸附遵循准二级动力学模型，可以用Langmuir等温线模型表示，最大吸附容量为35.44 mg·g ^-1。此外，TP4纳米纤维膜对亚甲基蓝的光催化降解遵循一级动力学模型，并表现出较高的可重用性。因此，聚乳酸/g-二氧化钛纳米纤维膜作为一种高效的染料去除材料，在废水处理中显示出良好的应用前景。