自支撑尼龙66/钼酸铋/碘化银复合纳米纤维的制备及其光催化性能

Preparation and photocatalytic performance of PA66/Bi2MoO6/AgI composite nanofibers

利用静电纺丝和溶剂热法制备了尼龙66/钼酸铋复合纳米纤维,在室温下利用沉积-沉淀法将碘化银沉积在尼龙66/钼酸铋复合纳米纤维表面,制备了具有可见光响应的自支撑尼龙66/钼酸铋/碘化银复合纳米纤维。通过X射线衍射、扫描电子显微镜、能谱扫描仪、紫外-可见漫反射、光电流等表征分析了晶型结构、表面形貌及其光学性能。以罗丹明B为污染物,考察了尼龙66/钼酸铋/碘化银的光催化性能。实验结果表明,当碘化银复合量为10%时,尼龙66/钼酸铋/碘化银复合纳米纤维展示出最优异的光催化活性,在120 min时其降解率可达99.8%。这种尼龙66/钼酸铋/碘化银复合纳米纤维在多次循环后仍保持较高的光催化稳定性,相比粉体光催化剂,还具有更优秀的可回收性。

Bi2MoO6/PA66 composite nanofibers were prepared by electrostatic spinning and solvothermal method,and AgI was deposited on the surface of PA66/Bi2MoO6 composite nanofibers at room temperature via deposition-precipitation method,subsequently PA66/Bi2MoO6/AgI composite nanofibers with visible light response were finally prepared.The crystal structure,surface morphology and catalytic activity of the composites were systematically analyzed by XRD,SEM,EDS,UV-Vis,photocurrent and other characterization methods.The results showed that the introduction of AgI mostly enhanced photocatalytic ability.The photocatalytic activity of the as-obtained sample was evaluated by the degradation of rhodamine B under visible light irradiation.It was found that the composites with 10%AgI loading exhibited highest decolorization rate of 99.8%within 120 min.It was worth noting that the PA66/Bi2MoO6/AgI composite nanofiber catalyst not only maintained higher photocatalytic stability after multiple cycles,but also had better recyclability than that of powder photocatalyst owing to its one-dimensional structure and good flexibility.