Synthesis of γ-Fe2O3@SiO2@polypyrrole core/shell/shell nanospheres with flexible controllability of electromagnetic properties

被引：15
作者：
Zhang, Yajie [1 ]
Zhang, Zhiming [1 ]
Xu, Shicong [2 ,3 ]
Yu, Liangmin [1 ]
Long, Yunze [2 ,3 ]
Tang, Qunwei [4 ]
机构：
[1] Ocean Univ China, Minist Educ, Key Lab Marine Chem Theory & Technol, Qingdao 266100, Peoples R China
[2] Qingdao Univ, Coll Phys, Qingdao 266071, Peoples R China
[3] Qingdao Univ, Collaborat Innovat Ctr Low Dimens Nanomat & Optoe, Qingdao 266071, Peoples R China
[4] Ocean Univ China, Inst Mat Sci & Engn, Qingdao 266100, Peoples R China
来源：
RSC ADVANCES | 2016年 / 6卷 / 08期
基金：
中国国家自然科学基金;
关键词：
MICROWAVE-ABSORPTION PROPERTIES; ABSORBING PROPERTIES; POLYANILINE; POLYPYRROLE; COMPOSITES; NANOCOMPOSITES; PARTICLES; SURFACE; NANOSTRUCTURES; NANOPARTICLES;
D O I：
10.1039/c5ra25576g
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
A new anchoring method by -SO3H groups was proposed to prepare gamma-Fe2O3@SiO2@ polypyrrole (gamma-Fe2O3@SiO2@PPy) nanospheres with core/shell/shell structure. In the reaction process involved, the sulfonic-functionalized gamma-Fe2O3@SiO2 (gamma-Fe2O3@ SiO2-SO3H) acts as the core for the polymerization of pyrrole. And PPy can be anchored to form on the surface of gamma-Fe2O3@SiO2 to form gamma-Fe2O3@SiO2@PPy nanospheres with the help of the sulfonic groups on the surface of gamma-Fe2O3@SiO2. Moreover, flexible controllability of the conductivity and saturation magnetization of the resulting gamma-Fe2O3@SiO2@PPy nanospheres can be realized through this method. The resulting electromagnetic gamma-Fe2O3@SiO2@PPy nanospheres show a maximum conductivity of 53 S cm(-1) and saturation magnetization of 8.17 A m(2) kg(-1). The method reported here may provide an efficient way to realize the best impedance matching between complex permeability and complex permittivity.
引用
收藏
页码：6623 / 6630
页数：8
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