Silver nanostructures (silver nanopaerticles e.g AgNPs and silver nanoplates e.g AgNPls) of various sizes and shapes were prepared using different reducing agents in ionic liquid media. The ionic liquid 1-butyl-3-methylimidazolium tetrafluoroborate, which acts both as a cosolvent and a surfactant, was used to synthesize smaller and more ordered silver nanostructures. Spherical nanoparticles (silver NPs) were prepared using sodium borohydride as a reducing agent. On the other hand, plate-shaped silver nanostructures (silver NPls) were prepared using hydrazine hydrate as a reducing agent. The as-synthesized silver nanostructures were characterized by scanning electron microscopy, powder X-ray diffraction, field-emission scanning electron microscopy, transmission electron microscopy, X-ray photoelectron spectroscopy, ultraviolet–visible spectroscopy, and Brunauer–Emmett–Teller analysis. The resulting materials were applied for the photodegradation of methyl orange under visible light irradiation. Because of their large surface area, the silver NPs showed better photocatalytic activity compared with that of Ag NPls.

中文翻译：

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离子液体介质中银纳米结构的合成及其在光降解甲基橙中的应用

在离子液体介质中使用不同的还原剂制备各种尺寸和形状的银纳米结构（银纳米颗粒，例如AgNPs 和银纳米片，例如AgNPls）。离子液体 1-丁基-3-甲基咪唑鎓四氟硼酸盐可用作助溶剂和表面活性剂，用于合成更小、更有序的银纳米结构。使用硼氢化钠作为还原剂制备球形纳米粒子（银纳米粒子）。另一方面，使用水合肼作为还原剂制备板状银纳米结构（银 NPs）。合成的银纳米结构通过扫描电子显微镜、粉末 X 射线衍射、场发射扫描电子显微镜、透射电子显微镜、X 射线光电子能谱、紫外-可见光谱、和 Brunauer-Emmett-Teller 分析。所得材料用于在可见光照射下光降解甲基橙。由于它们的大表面积，与银 NPs 相比，银 NPs 表现出更好的光催化活性。