Division of Biotechnology, Advanced Institute of Environment and Bioscience, College of Environmental and Bioresource Sciences, Chonbuk National University, Iksan, Jeonbuk 570-752, South Korea.
Department of Forest Environment Science, College of Agriculture & Life Sciences, Chonbuk National University, Jeonju 561-756, South Korea.
Carbohydr Polym. 2015 Nov 20;133:39-45. doi: 10.1016/j.carbpol.2015.06.097. Epub 2015 Jul 10.
In this current study, we report on the reduction of noble metal silver into silver nanoparticles using defatted cashew nut shell (CNS) starch as both the reducing and capping agents. Furthermore, it was compared with commercially available silver nanopowder for the first time. Color changes, ultraviolet-visible spectra (433.76nm), X-ray diffraction peaks (2θ=37.8, 46.3, 66.2, and 77.92) revealed the face-centered cubic (fcc) geometry of silver nanoparticles, scanning electron microscopy-energy dispersive spectroscopy confirmed the presence of elemental silver nanoparticles and the defatted CNS starch silver nanoparticle structures was in accordance to commercial silver nanopowder. The size of both the nanoparticles was found to be similar in the range of 10-50nm as analyzed using high resolution-transmission electron micrographs. The FT-IR spectroscopy revealed the shifting of NH and OH of defatted CNS starch, starch based silver nanoparticle and commercial silver nanopowder has parallel functional groups. The use of environmentally benign and renewable materials like defatted CNS starch offers an alternative to large scale synthesis of silver nanoparticle and includes numerous benefits like eco-friendly and compatibility for pharmaceutical and biomedical applications.
在本研究中，我们报告了使用脱油腰果壳（CNS）淀粉作为还原剂和封端剂将贵金属银还原为银纳米粒子的情况。此外，这是首次将其与市售的银纳米粉末进行比较。颜色变化、紫外-可见光谱（433.76nm）、X 射线衍射峰（2θ=37.8、46.3、66.2 和 77.92）揭示了银纳米粒子的面心立方（fcc）结构，扫描电子显微镜-能谱证实了元素银纳米粒子的存在，并且脱油 CNS 淀粉-银纳米粒子结构与市售银纳米粉末一致。使用高分辨率透射电子显微镜分析发现，两种纳米粒子的尺寸均在 10-50nm 范围内相似。傅里叶变换红外光谱显示脱油 CNS 淀粉、淀粉基银纳米粒子和商业银纳米粉末的 NH 和 OH 发生了位移，具有平行的功能基团。使用环境友好且可再生的材料，如脱油 CNS 淀粉，为大规模合成银纳米粒子提供了一种替代方法，具有环保和与制药及生物医学应用兼容性等诸多优势。
