期刊
MATERIALS CHEMISTRY AND PHYSICS
卷 223, 期 -, 页码 745-750出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.matchemphys.2018.11.046
关键词
Cobalt; Polyol; Capping agent; Ferromagnetic; Catalysis
Cobalt particle were synthesized by the polyol synthesis with sodium borohydride as the additional reductant and 1,10-phenantroline, etidronic, salicylic, succinic, tartaric and oleic acids as capping agents for varying particle size. The phase composition of the obtained samples was confirmed by X-ray diffraction (XRD), morphological studies performed by scanning electron microscopy (SEM), transmission electron microscopy (TEM) and specific surface area (SSA) estimation. The dependence of sizes and magnetic properties of the prepared nanoparticles on the synthesis condition (reaction time, capping agent nature and concentration) was investigated. The interaction between capping agents and particle surface was studied using FTIR spectroscopy. The catalytic activities of the obtained samples were evaluated for the aqueous reduction of 4-nitrophenol (4-NP) to 4-Aminophenol (4-AP) with sodium borohydride. The obtained results indicated the presence of reaction induction period, the minimum value of which is 1 min, while 90% conversion of 4-NP was observed after 12 min. We conclude that use of capping agent of different nature allows to regulate particle sizes and magnetic properties and improve their catalytic activity.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据