Jiang Fengrui, Cai Weiquan, Tan Guolong
State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan, 430070, China.
School of Chemistry, Chemical Engineering and Life Sciences, Wuhan University of Technology, Wuhan, 430070, China.
Nanoscale Res Lett. 2017 Dec;12(1):401. doi: 10.1186/s11671-017-2165-y. Epub 2017 Jun 12.
Selenium is an important element for human's health, small size is very helpful for Se nanoparticles to be absorbed by human's body. Here, we present a facile approach to fabrication of small selenium nanoparticles (Nano-Se) as well as nanorods by dissolving sodium selenite (NaSeO) in glycerin and using glucose as the reduction agent. The as-prepared selenium nanoparticles have been characterized by X-ray diffraction (XRD), UV-Vis absorption spectroscopy and high resolution transmission electron microscope (HRTEM). The morphology of small Se nanoparticles and nanorods have been demonstrated in the TEM images. A small amount of 3-mercaptoproprionic acid (MPA) and glycerin play a key role on controlling the particle size and stabilize the dispersion of Nano-Se in the glycerin solution. In this way, we obtained very small and uniform Se nanoparticles; whose size ranges from 2 to 6 nm. This dimension is much smaller than the best value (>20 nm) ever reported in the literatures. Strong quantum confinement effect has been observed upon the size-dependent optical spectrum of these Se nanoparticles.
硒是对人体健康很重要的元素，小尺寸非常有助于硒纳米颗粒被人体吸收。在此，我们展示了一种简便的方法来制备小尺寸的硒纳米颗粒（纳米硒）以及纳米棒，即将亚硒酸钠（NaSeO）溶解在甘油中，并使用葡萄糖作为还原剂。所制备的硒纳米颗粒已通过X射线衍射（XRD）、紫外可见吸收光谱和高分辨率透射电子显微镜（HRTEM）进行了表征。小尺寸硒纳米颗粒和纳米棒的形态已在透射电镜图像中得到证明。少量的3-巯基丙酸（MPA）和甘油在控制粒径以及稳定纳米硒在甘油溶液中的分散方面起着关键作用。通过这种方式，我们获得了非常小且均匀的硒纳米颗粒；其尺寸范围为2至6纳米。这个尺寸比文献中报道的最佳值（>20纳米）小得多。在这些硒纳米颗粒的尺寸依赖性光谱中观察到了强烈的量子限域效应。
