Ag nanoparticles (AgNPs) and Ag/polyvinyl alcohol (PVA) nanofiber composites were synthesized via chemical reduction and electrospinning methods, respectively. The filler mass of AgNPs in the Ag/PVA nanofiber composites was varied from 0.025 to 0.125 g. X-ray diffraction (XRD) analysis was used to determine the structure, crystal size, and lattice parameter of powdered AgNPs. Fourier transform infrared (FTIR) spectroscopy was used to determine the functional groups of the samples. Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) were used to observe the fiber diameter, particle size, and nanoparticle size distribution in the Ag/PVA composites. The XRD analysis showed that the AgNPs were ~ 18.9 nm in diameter, consistent with TEM observations. FTIR analysis indicated the presence of Ag–O functional groups in the composites for all mass variations of AgNPs, as indicated by a peak at 490–510 cm−1. The emergence of this functional group confirmed the presence of AgNPs in the composites. SEM and TEM analyses showed that the diameter of the Ag/PVA nanofibers substantially increased from 150.5 (AgNPs mass 0.025 g) to 190.5 nm (AgNPs mass 0.125 g). AgNPs were successfully dispersed in a PVA polymer matrix network appear to have agglomerated at some those network points.

中文翻译：

---

Ag纳米粒子在Ag/聚乙烯醇纳米纤维复合材料中的作用

分别通过化学还原和静电纺丝方法合成了银纳米粒子 (AgNPs) 和银/聚乙烯醇 (PVA) 纳米纤维复合材料。Ag/PVA 纳米纤维复合材料中 AgNPs 的填料质量从 0.025 到 0.125 g 不等。X 射线衍射 (XRD) 分析用于确定粉末状 AgNP 的结构、晶体尺寸和晶格参数。傅里叶变换红外 (FTIR) 光谱用于确定样品的官能团。使用扫描电子显微镜 (SEM) 和透射电子显微镜 (TEM) 观察 Ag/PVA 复合材料中的纤维直径、粒径和纳米粒径分布。XRD 分析表明，AgNPs 的直径约为 18.9 nm，与 TEM 观察结果一致。FTIR 分析表明，对于 AgNPs 的所有质量变化，复合材料中都存在 Ag-O 官能团，如 490-510 cm-1 处的峰所示。该官能团的出现证实了复合材料中存在 AgNPs。SEM 和 TEM 分析表明，Ag/PVA 纳米纤维的直径从 150.5（AgNPs 质量 0.025 g）大幅增加到 190.5 nm（AgNPs 质量 0.125 g）。AgNPs 成功地分散在 PVA 聚合物基质网络中，似乎在一些网络点处聚集。