Large scale synthesis of FeS coated Fe nanoparticles as reusable magnetic photocatalysts
Large scale synthesis of FeS coated Fe nanoparticles as reusable magnetic photocatalysts
复制标题
大规模合成 FeS 包覆的铁纳米粒子作为可重复使用的磁性光催化剂
DOI：
10.1007/s11706-013-0213-9
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发表时间：
2013-09-01
影响因子：
2.7
通讯作者：
Ge, Hong-Liang
中科院分区：
文献类型：
--
作者：
Feng, He;Si, Ping-Zhan;Ge, Hong-Liang
采用高温反应法在石英管中制备了FeS包覆Fe纳米粒子。该方法简单易行，可通过控制Fe/S原子比，大规模合成具有可调壳/核结构的FeS/Fe纳米粒子。系统地研究了纳米粒子的结构、磁性和光催化性能。FeS/Fe纳米粒子在可见光下降解亚甲基蓝的良好光催化性能和铁磁性Fe核的高饱和磁化强度使得FeS/Fe纳米粒子成为一种良好的光催化剂，可以很容易地用磁铁收集和回收。交换偏置高达11 mT的FeS诱导Fe中观察到的Fe/FeS纳米粒子与铁/反铁磁界面。铁核的尺寸效应使超导体的矫顽力提高到32 mT。
The FeS coated Fe nanoparticles were prepared by using high temperature reactions between the commercial Fe nanoparticles and the S powders in a sealed quartz tube. The simple method developed in this work is effective for large scale synthesis of FeS/Fe nanoparticles with tunable shell/core structures, which can be obtained by controlling the atomic ratio of Fe to S. The structural, magnetic and photocatalytic properties of the nanoparticles were investigated systematically. The good photocatalytic performance originating from the FeS shell in degradation of methylene blue under visible light and the high saturation magnetization originating from the ferromagnetic Fe core make the FeS/Fe nanoparticles a good photocatalyst that can be collected and recycled easily with a magnet. An exchange bias up to 11 mT induced in Fe by FeS was observed in the Fe/FeS nanoparticles with ferro/antiferromagnetic interfaces. The enhanced coercivity up to 32 mT was ascribed to the size effect of Fe core.