Nickel nanoparticles obtained by a modified polyol process: Synthesis, characterization, and magnetic properties

被引：209
|
作者：
Couto, Giselle G.
Klein, Joao J.
Schreiner, Wido H.
Mosca, Dante H.
de Oliveira, Adilson J. A.
Zarbin, Aldo J. G.
机构：
[1] UFPR, Dept Quim, BR-81531990 Curitiba, Parana, Brazil
[2] UFPR, Dept Fis, BR-81531990 Curitiba, Parana, Brazil
[3] Univ Fed Sao Carlos, Dept Fis, BR-13565905 Sao Paulo, Brazil
来源：
JOURNAL OF COLLOID AND INTERFACE SCIENCE | 2007年 / 311卷 / 02期
基金：
巴西圣保罗研究基金会;
关键词：
nickel nanoparticles; polyol; magnetic measurements;
D O I：
10.1016/j.jcis.2007.03.045
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The synthesis of nickel nanoparticles using poly (N-vinilpyrrolidone) (PVP) as protective agent was studied. The nanoparticles were prepared in air according to a modified polyol route, using nickel chloride as precursor and sodium borohydride as reducing agent. Samples with different nickel/PVP ratio were obtained. The X-ray diffraction and transmission electron microscopy (TEM) measurements indicate the occurrence of face-centered cubic metallic nickel nanoparticles with a medium diameter of 3.8 nm and good size dispersion. Fourier transformed infrared spectroscopy (FT-IR) and X-ray photoelectron spectroscopy (XPS) data show an effective interaction between the nickel nanoparticles surface and the carboxyl oxygen atoms of PVP. Magnetic measurements show single-domain nonideal superparamagnetism behavior due to dipolar magnetic coupling between particles. (c) 2007 Elsevier Inc. All rights reserved.
引用
收藏
页码：461 / 468
页数：8
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