Facile Synthesis of Carbon-Encapsulated Fe3O4 core/shell Nanospheres for Application in Pb(II) Electrochemical Determination

被引：11

作者：

Sang, Shengbo ^{[1
]}

Zhang, Hui ^{[1
,2
]}

Sun, Youyi ^{[3
]}

Jian, Aoqun ^{[1
]}

Zhang, Wendong ^{[1
]}

机构：

[1] Taiyuan Univ Technol, Minist Educ & Coll Informat Engn, Micro Nanosyst Res Ctr, Key Lab Adv Transducers & Intelligent Control Sys, Taiyuan 030024, Peoples R China

[2] North Univ China, Coll Comp & Control Engn, Taiyuan 030051, Peoples R China

[3] North Univ China, Shanxi Prov Key Lab Funct Nanocomposites, Taiyuan 030051, Peoples R China

来源：

INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE | 2017年 / 12卷 / 02期

基金：

中国国家自然科学基金;

关键词：

mesoporous carbon; Fe3O4; core-shell; electrochemical detection; heavy metal; HEAVY-METAL IONS; GRAPHENE OXIDE; SENSITIVE DETECTION; CATALYTIC-ACTIVITY; AQUEOUS-SOLUTION; WATER; NANOPARTICLES; MICROSPHERES; ELECTROCATALYSIS; NANOCOMPOSITE;

D O I：

10.20964/2017.02.28

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

In this study, carbon-encapsulated Fe3O4 core/shell nanospheres (Fe3O4@C) were synthesized by a facile method and characterized by transmission electron microscopy, scan electron microscopy, X-ray diffraction, IR spectroscopy and Raman spectroscopy. Furthermore, Fe3O4@C nanospheres electrode was characterized by cyclic voltammetry and electrochemical impedance spectra. The Fe3O4@C nanospheres electrode exhibited remarkable electrocatalytic activity towards Pb(II) oxidation with higher limit of detection and sensitivity of 0.17 mu M and 95.6 mu A/mu M compared to other active materials on electrochemical detection of Pb(II) reported in previous works. Moreover, the Fe3O4@C nanospheres electrode exhibited high cycling stability and long-term durability. These results were attributed to the porous structure of the Fe3O4@C nanospheres electrode, which enabled the Fe3O4@C nanospheres to become highly accessible to the metal ion and provided more void volume for the reaction with metal ions. This work suggests that there is great potential in employing the Fe3O4@C nanospheres as heavy metal ions sensors.

引用

页码：1306 / 1317

页数：12

共 29 条

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