金纳米粒子的绿色制备研究

Green Synthesis of Gold Nanoparticles

以桔子皮提取液为还原剂兼保护剂,氯金酸溶液为前驱体,采用化学还原法制备了金纳米溶胶,并通过离心和干燥的方法得到金纳米粉末。采用X射线衍射、紫外-可见光谱仪、红外光谱、透射电镜和环境扫描电镜等对所制备的样品的结晶性和粒径进行了表征。研究表明:所制备溶胶中的小粒径金纳米粒子均匀的分布在5nm-30nm之间,所制备的金粉末结晶性能优异。氯金酸溶度用量、桔子皮提取液用量等反应条件对金粒子的粒径和形貌有着较大的影响。在常温时,当氯金酸溶液用量为2mL,桔子皮提取液用量为5 mL时,所得到的纳米金颗粒的粒径最小。

Gold nano colloids were synthesized by using a simple process in water with orange peel extract as the protective and reducing agents and chloroauric acid solution as precursor.The samples were characterized by using X-ray powder dif&action(XRD),UV-vis spectrum,Fourier transform infrared spectroscopy(FT-IR),transmission electron microscopy(TEM)and scanning electron microscope(SEM).The gold nanoparticles in the colloid are highly crystallized and have small size with a narrow distribution of 5-30 nm.The contents of orange peel extract and chloroauric acid solution played an important role in determining the size and morphology of the gold nanoparticles.The gold nanoparticles with the smallest size were obtained when 5 mL orange peel extract and 2 mL chloroauric acid solution were used.