Department of Physics, Mar Ivanios College, Thiruvananthapuram 695 015, Kerala, India.
Spectrochim Acta A Mol Biomol Spectrosc. 2012 Jun;91:35-8. doi: 10.1016/j.saa.2012.01.063. Epub 2012 Feb 2.
A rapid, one pot and biogenic fabrication of Pd nanoparticles is reported. Pd nanoparticles of size below 5 nm size are synthesized using the dried leaf powder of Anacardium occidentale. Rapid reduction results in the formation of spherical particles. The nanoparticles are characterized by XRD, TEM, UV-visible and FTIR analysis. The absorption spectra have continua which are characteristic of Pd nanoparticles. The broad nature of the XRD pattern arising due to reflections from the (111), (200), (220), (311) and (222) planes indicate crystallinity of the nanoparticles with face centered cubic (fcc) structure. The morphology and shape of the nanoparticles are obtained by analyzing TEM images. Most of the nanoparticles are spherical with size in the range 2.5 and 4.5 nm. FTIR spectra of dried Pd nanoparticles, native and treated dried leaf powder have been analyzed to find out the biomolecule responsible for the reduction of Pd(2+) and capping of the palladium nanoparticles. The possible mechanism of formation of the nanoparticles is suggested.
本文报道了一种快速、一锅法和生物合成钯纳米粒子的方法。使用腰果的干叶粉合成了尺寸小于 5nm 的钯纳米粒子。快速还原导致形成球形颗粒。通过 XRD、TEM、UV-可见和 FTIR 分析对纳米粒子进行了表征。吸收光谱具有 Pd 纳米粒子特征的连续谱。由于来自（111）、（200）、（220）、（311）和（222）面的反射引起的 XRD 图案的宽性质表明纳米粒子具有面心立方（fcc）结构的结晶度。通过分析 TEM 图像获得了纳米粒子的形态和形状。大多数纳米粒子是球形的，尺寸在 2.5nm 到 4.5nm 之间。分析了干燥 Pd 纳米粒子、天然和处理干燥叶粉的 FTIR 光谱，以找出负责还原 Pd(2+)和包覆钯纳米粒子的生物分子。提出了纳米粒子形成的可能机制。
