Preparation and magnetic properties of nickel nanorods by thermal decomposition reducing methods

• Published in: Transactions of Nonferrous Metals Society of China Vol. 16; no. B01; pp. 96 - 100
• Main Author: 罗愉 张建成 沈悦 江树涛 刘国勇 王林军
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01.06.2006; School of Materials Science and Engineering, Shanghai University, Shanghai 200072, China
• Subjects: coercivity; nickel hydroxide nanorods; nickel nanorods; PEG(polyethylene glycol); PVP(polyvinylpyrrolidone); specific saturation magnetization; 制备; 氢氧化镍; 热降解还原法; 磁性质; 镍纳米棒; specific saturation magnetization; nickel hydroxide nanorods; coercivity; nickel nanorods; PVP(polyvinylpyrrolidone); PEG(polyethylene glycol)
• ISSN: 1003-6326
• DOI: 10.1016/S1003-6326(06)60151-9

The single-crystalline nickel nanorods with narrow size distribution and better magnetic properties were synthesized by thermal decomposition of nickel hydroxide nanorods precursor powders, which were produced by soft template method using nickel oxalic acid as raw material. The influences of hydrothermal reaction temperature and time on morphology of the products were investigated. The structure, morphology and magnetic properties of the products were characterized by X-ray powder diffraction （XRD）, transmission electron microscopy （TEM）, thermogravimetric differential scanning calorimetry （TGA-DSC） and vibrating sample magnetometer （VSM）. The as-prepared nickel nanorods are uniform with a diameter of 10-15 nm and length 70-120 nm. The results of magnetic measurements show that the specific saturation magnetization（its） and coercivity values（He） of the nickel nanorods are 50.649 A·m^2/kg and 190.0 × （103/4π ）A/m,respectively. Finally, a possible mechanism for the formation of nickel nanorods was discussed briefly.