Optimal synthesis and magnetic properties of size-controlled nickel phosphide nanoparticles
Optimal synthesis and magnetic properties of size-controlled nickel phosphide nanoparticles
复制标题
尺寸控制的磷化镍纳米颗粒的优化合成及磁性能
DOI：
10.1016/j.jallcom.2014.03.110
复制
发表时间：
2014-08
影响因子：
6.2
通讯作者：
Wu Zhonghua
中科院分区：
文献类型：
--
作者：
Tan Yuanyuan;Sun Dongbai;Yu Hongying;Wu Tao;Yang Bin;Gong Yu;Yan Shi;Du Rong;Chen Zhongjun;Xing Xueqing;Mo Guang;Cai Quan;Wu Zhonghua
采用液相脉冲放电法制备磷化镍纳米颗粒。通过改变反应温度、反应物浓度、反应物摩尔比、脉冲放电次数和脉冲放电电压等参数，可以很容易地控制纳米颗粒的尺寸和形貌。通过单因素实验确定了最佳反应参数。利用x射线衍射、x射线吸收精细结构谱、场发射扫描电镜和能量色散x射线谱对制备的Ni-P纳米粒子进行了表征。采用振动样品磁强计对Ni-P纳米粒子进行了磁性测量。结果表明，制备的Ni - P纳米颗粒为非晶相，由Ni和P元素组成。制备的Ni-P纳米颗粒中的p含量随Ni-P粒径的增大而增加，与反应溶液中p浓度的初始浓度无关。Ni - p纳米粒子在Ni中心周围共有12个Ni - Ni和Ni - p近邻。Ni-Ni距离随粒径的增大而增大。制备的Ni-P纳米粒子具有顺磁性。它们的饱和磁化强度也与尺寸有关。较大的Ni - P颗粒具有较低的饱和磁化强度，这可归因于P进入Ni晶格，导致较大的Ni - Ni分离和更松散、扭曲的局部原子结构。
Pulse discharge method was used in liquid phase to prepare nickel phosphide nanoparticles. The size and morphology of the as-prepared nanoparticles were found to be easily controlled through changing reaction parameters such as temperature, reactants concentration, reactants molar ratio, pulse discharge number, and pulse discharge voltage. The optimal reaction parameters have been obtained by single-factor experiments. X-ray diffraction, X-ray absorption fine structure spectra, Field Emission Scanning Electron Microscope, and Energy Dispersive X-ray Spectrum were used to characterize the as-prepared Ni–P nanoparticles. Vibrating Sample Magnetometer was used as magnetic measurements of the Ni–P nanoparticles. The results demonstrate that the as-prepared Ni–P nanoparticles are in amorphous phase, and consist of Ni and P elements. The P-content in the as-prepared Ni–P nanoparticles increases with the increasing of Ni–P particle size, and is independent on the initial concentration of P-concentration in the reaction solution. The Ni–P nanoparticles have totally about 12 near-neighbors of Ni–Ni and Ni–P around center Ni. The Ni–Ni distance increases with the increasing particle size. The as-prepared Ni–P nanoparticles present paramagnetic nature. Their saturated magnetizations are also size-dependent. The larger Ni–P particles has lower saturated magnetization, which can be attributed to the entrance of P into Ni lattice, causing a larger Ni–Ni separation and a looser, distorted local atomic structure.
登录
查看更多内容
影响因子：
--
作者：
Guojun Shi;Jianyi Shen
通讯作者：
Guojun Shi;Jianyi Shen
DOI：
10.1063/1.2644556
发表时间：
2007-02
期刊：
--
影响因子：
--
作者：
Jinxia Song;Zheng Wei;Z. Pan;Z. Xie;Shiqiang Wei
通讯作者：
Jinxia Song;Zheng Wei;Z. Pan;Z. Xie;Shiqiang Wei
影响因子：
15
作者：
Popczun, Eric J.;McKone, James R.;Schaak, Raymond E.
通讯作者：
Schaak, Raymond E.
影响因子：
4
作者：
B. Mauvernay;M. Doublet;L. Monconduit
通讯作者：
B. Mauvernay;M. Doublet;L. Monconduit
影响因子：
3.8
作者：
G. Bunker
通讯作者：
G. Bunker