Singh Prashant, Kumari Kamlesh, Katyal Anju, Kalra Rashmi, Chandra Ramesh
A.R.S.D. Collage,Dr. B.R. Ambedkar Center for Biomedical Research, Department of Chemistry, University of Delhi, Delhi 110007, India.
Spectrochim Acta A Mol Biomol Spectrosc. 2009 Jul;73(1):218-20. doi: 10.1016/j.saa.2009.02.007. Epub 2009 Feb 20.
In this paper, we report the reduction of silver and gold salts by methanolic solution of sodium borohydride in tetrazolium based ionic liquid as a solvent at 30 degrees C leads to pure phase of silver and gold nanoparticles. Silver and gold nanoparticles so-prepared were well characterized by powder X-ray diffraction measurements (XRD), transmission electron microscopy (TEM) and QELS. XRD analysis revealed all relevant Bragg's reflection for crystal structure of silver and gold metal. XRD spectra also revealed no oxidation of silver nanoparticles to silver oxide. TEM showed nearly uniform distribution of the particles in methanol and it was confirmed by QELS. Silver and gold nanoparticles in ionic liquid can be easily synthesized and are quite stable too.
在本文中，我们报道了在30摄氏度下，以基于四唑鎓的离子液体为溶剂，用硼氢化钠的甲醇溶液还原银盐和金盐可得到纯相的银纳米颗粒和金纳米颗粒。通过粉末X射线衍射测量（XRD）、透射电子显微镜（TEM）和准弹性光散射（QELS）对如此制备的银纳米颗粒和金纳米颗粒进行了充分表征。XRD分析揭示了银和金金属晶体结构的所有相关布拉格反射。XRD光谱还表明银纳米颗粒没有氧化成氧化银。TEM显示颗粒在甲醇中分布几乎均匀，QELS也证实了这一点。离子液体中的银纳米颗粒和金纳米颗粒易于合成且相当稳定。
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