糊精介导的 Ag NPs 的合成用于 Cu(2+)离子的比色分析和 Au NPs 的催化活性。
Dextrin-mediated synthesis of Ag NPs for colorimetric assays of Cu(2+) ion and Au NPs for catalytic activity.
机构信息
Department of Polymer Science and Technology, University College of Science and Technology, University of Calcutta, 92 A.P.C. Road, Kolkata 700 009, India; Department of Chemistry, Tamralipta Mahavidyalaya, Tamluk, Purba Medinipur 721636, India.
Department of Chemical and Biological Engineering, Industrial Membrane Research Institute, University of Ottawa, 161 Louis Pasteur St., Ottawa, ON K1N 6N5, Canada.
出版信息
Int J Biol Macromol. 2015 Sep;80:309-16. doi: 10.1016/j.ijbiomac.2015.06.058. Epub 2015 Jul 2.
A facile one-pot approach for rapid synthesis of silver and gold nanoparticles (Ag NPs and Au NPs) with narrow size distribution and good stability was described by reducing silver nitrate and chloroauric acid with polysaccharide dextrin. Here, dextrin was used as both a reducing and stabilizing agent for synthesis of NPs. The as-synthesized Ag NPs and Au NPs were characterized by UV-visible absorption spectroscopy, transmission electron microscopy (TEM) and X-ray diffraction (XRD). The Ag NPs and Au NPs exhibited an absorption maxima at 404 and 547 nm respectively. TEM images showed NPs in the range of 8-28 nm. The crystallinity of the NPs was measured by XRD analysis. Furthermore, the as-prepared Ag NPs revealed colorimetric sensor property for detection of Cu(2+) ions based on changes in absorbance resulting from metal ion-induced aggregation of NPs or direct deposition of metal ions onto NPs. The as-prepared Au NPs exhibited a notable catalytic activity toward the reduction of 4-nitrophenol to 4-aminophenol in the presence of NaBH4.
通过使用多糖糊精还原硝酸银和氯金酸，描述了一种快速简便的一锅法，用于合成具有窄尺寸分布和良好稳定性的银纳米粒子（Ag NPs）和金纳米粒子（Au NPs）。在这里，糊精既用作 NPs 合成的还原剂，也用作稳定剂。通过紫外-可见吸收光谱、透射电子显微镜（TEM）和 X 射线衍射（XRD）对合成的 Ag NPs 和 Au NPs 进行了表征。Ag NPs 和 Au NPs 的吸收最大值分别在 404nm 和 547nm 处。TEM 图像显示 NPs 的尺寸范围为 8-28nm。通过 XRD 分析测量了 NPs 的结晶度。此外，所制备的 Ag NPs 基于 NPs 因金属离子诱导聚集或金属离子直接沉积在 NPs 上而导致的吸光度变化，表现出对 Cu(2+)离子的比色传感器性质。所制备的 Au NPs 在存在 NaBH4 的情况下对 4-硝基苯酚还原为 4-氨基酚表现出显著的催化活性。
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