Reduction mechanism of Ni2+ into Ni nanoparticles prepared from different precursors: Magnetic studies

Pramana

N S Gajbhiye²  R S Ningthoujam1¹  Sachil Sharma² 

[1] Chemistry Division, Bhabha Atomic Research Centre, Mumbai 400 085, India$$;Department of Chemistry, Indian Institute of Technology, Kanpur 208 016, India$$

关键词: Ni nanoparticles;    ethylene glycol;    cyclic voltmetery;    reducing agent;    complex.;   

DOI  :  

学科分类：物理（综合）

来源: Indian Academy of Sciences

【 摘 要 】

The reduction mechanism of Ni2+ into Ni particles using different precursors such as NiCl2 solution, NiO powder and Ni[(NH3)6]Cl2 complex has been established. Different particle sizes can be designed from these precursors. The smallest crystallite size (12 nm) can be obtained from Ni[(NH3)6]Cl2 complex in the presence of the stabilizing ligand (oleic acid). The field-cooled (FC) and zero-field-cooled (ZFC) magnetization of Ni particles obtained from Ni[(NH3)6]Cl2 complex in the temperature range 5–300 K established the ferromagnetic interaction up to 300 K. The magnetization values at three different temperatures 5, 70 and 300 K are 50.2, 49.5 and 45.5 Oe respectively at 3 × 104 Oe applied field and such values are less than that of the bulk value. The Curie temperature (𝑇c) decreases slightly with the decrease of particle size. This study will provide guidance in the preparation of metal nanoparticles from different precursors.

【 授权许可】

Unknown