Cetyltrimethylammonium Bromide Assisted Preparation and Characterization of Pd Nanoparticles with Spherical, Worm-Like, and Network-Like Morphologies

Abstract

With cetyltrimethylammonium bromide (CTAB) as a surfactant, a series of palladium nanoparticles (Pd NPs) with various morphologies were successfully synthesized by controlling the concentrations of CTAB and NaBH 4 in an aqueous solution. The morphology of the Pd NPs evolved from nanospheres as interconnected networks with a rise in the CTAB concentration. The CTAB and NaBH 4 concentrations were important factors for the control of the final shape of the Pd NPs. 摘要： 以十六烷基三甲基溴化铵 (CTAB) 为表面活性剂, NaBH 4 为还原剂, 通过调节水相体系中 CTAB 和 NaBH 4 浓度, 合成了一系列不同形貌的 Pd 纳米粒子, 合成过程简便易行且环境友好. 结果表明, 随着 CTAB 浓度的增加, Pd 粒子形貌由纳米微球逐渐向纳米线网络形态转变. CTAB 浓度和 NaBH 4 浓度是决定 Pd 粒子形貌的两个重要因素. Using a combination of different CTAB and NaBH 4 concentrations, we obtained Pd nanoparticles (NPs) with various morphologies like spheres, worm-like and nanowire networks in an aqueous system. The CTAB and NaBH4 concentrations were important factors in controlling the final shape of the Pd nanoparticles.