Facile synthesis, magnetic and microwave absorption properties of Fe3O4/polypyrrole core/shell nanocomposite

被引：167

作者：

Li, Yongbo ^{[2
,3
]}

Chen, Gen ^{[2
]}

Li, Qihou ^{[1
]}

Qiu, Guanzhou ^{[2
]}

Liu, Xiaohe ^{[2
]}

机构：

[1] Cent S Univ, Sch Met Sci & Engn, Changsha 410083, Hunan, Peoples R China

[2] Cent S Univ, Dept Inorgan Mat, Changsha 410083, Hunan, Peoples R China

[3] Inst 53 China N Ind Grp Corp, Jinan 250031, Peoples R China

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2011年 / 509卷 / 10期

基金：

中国国家自然科学基金;

关键词：

Fe3O4/PPY; Core/shell nanocomposite; In situ chemical oxidative polymerization; Microwave absorption property; NANOPARTICLES; POLYPYRROLE; POLYMERIZATION;

D O I：

10.1016/j.jallcom.2010.12.100

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：

Fe3O4/polypyrrole (PPy) core/shell nanocomposite, with Fe3O4 nanoparticle as core and PPy as shell, could be facilely synthesized via in situ chemical oxidative polymerization of pyrrole monomers on the surface of Fe3O4 nanoparticles. The results indicate that core/shell nanocomposite consists of Fe3O4 core with the mean diameter of 100 nm and adjacent PPy shell with a thickness of about 70 nm. The as-prepared Fe3O4/PPy core/shell nanocomposite exhibits a saturated magnetization of 20.1 emu/g and coercivity value of 368.3 Oe, respectively. The electromagnetic characteristics of Fe3O4/PPy core/shell nanocomposite were also investigated with a vector network analyzer in the 2-18 GHz range. The absorbing peak position moves to lower frequency with increasing the thicknesses of samples. The value of the minimum reflection loss is -22.4 dB at 12.9 GHz for Fe3O4/PPy core/shell nanocomposite with a thickness of 2.3 mm, and a broad peak with a bandwidth lower than -10 dB is about 5 GHz. Such strong absorption is attributed to better electromagnetic matching due to the existence of PPy and the special core/shell structure. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：4104 / 4107

页数：4

共 19 条

[1] Synthesis and characterization of polypyrrole-BaFe12O19 nanocomposite [J].

Birsoz, B. ;

Baykal, A. ;

Sozeri, H. ;

Toprak, M. S. .

JOURNAL OF ALLOYS AND COMPOUNDS, 2010, 493 (1-2) :481-485

[2] Ordering and stability in conducting polypyrrole [J].

Cheah, K ;

Forsyth, M ;

Truong, VT .

SYNTHETIC METALS, 1998, 94 (02) :215-219

[3] Enhanced microwave absorption in Ni/polyaniline nanocomposites by dual dielectric relaxations [J].

Dong, X. L. ;

Zhang, X. F. ;

Huang, H. ;

Zuo, F. .

APPLIED PHYSICS LETTERS, 2008, 92 (01)

[4] Synthesis and characterization of Ag/polypyrrole nanocomposites based on silver nanoparticles colloid [J].

Jing, Shengyu ;

Xing, Shuangxi ;

Yu, Lianxiang ;

Zhao, Chun .

MATERIALS LETTERS, 2007, 61 (23-24) :4528-4530

[5] Synthesis of conducting polypyrrole by radiolysis polymerization method [J].

Karim, M. R. ;

Lee, C. J. ;

Lee, M. S. .

POLYMERS FOR ADVANCED TECHNOLOGIES, 2007, 18 (11) :916-920

[6] Electromagnetic wave absorption properties of porous carbon/Co nanocomposites [J].

Liu, Qinglei ;

Zhang, Di ;

Fan, Tongxiang .

APPLIED PHYSICS LETTERS, 2008, 93 (01)

[7] Microwave-absorption properties of ZnO-coated iron nanocapsules [J].

Liu, X. G. ;

Geng, D. Y. ;

Meng, H. ;

Shang, P. J. ;

Zhang, Z. D. .

APPLIED PHYSICS LETTERS, 2008, 92 (17)

[8] Fluorescence and microwave-absorption properties of multi-functional ZnO-coated α-Fe solid-solution nanocapsules [J].

Liu, Xianguo ;

Geng, Dianyu ;

Shang, Panju ;

Meng, Hui ;

Yang, Fang ;

Li, Bing ;

Kang, Dianji ;

Zhang, Zhidong .

JOURNAL OF PHYSICS D-APPLIED PHYSICS, 2008, 41 (17)

[9] Controllable fabrication of SiO2/polypyrrole core-shell particles and polypyrrole hollow spheres [J].

Liu, Xiaohe ;

Wu, Hongyi ;

Ren, Fenglian ;

Qiu, Guanzhou ;

Tang, Motang .

MATERIALS CHEMISTRY AND PHYSICS, 2008, 109 (01) :5-9

[10] Polypyrrole micro- and nanowires synthesized by electrochemical polymerization of pyrrole in the aqueous solutions of pyrenesulfonic acid [J].

Lu, GW ;

Li, C ;

Shi, GQ .

POLYMER, 2006, 47 (06) :1778-1784

← 1 2 →