Solvothermal synthesis of size-tunable ZnFe2O4 colloidal nanocrystal assemblies and their electrocatalytic activity towards hydrogen peroxide

被引:26
作者
Liu, Ruirui [1 ]
Lv, Meng [1 ]
Wang, Qianbin [1 ]
Li, Hongliang [1 ]
Guo, Peizhi [1 ]
Zhao, X. S. [1 ]
机构
[1] Qingdao Univ, Sch Mat Sci & Engn, Inst Mat Energy & Environm, State Key Lab Breeding Based New Fiber Mat & Mode, Qingdao 266071, PR, Peoples R China
基金
中国国家自然科学基金;
关键词
ZnFe2O4; Colloidal nanocrystal; Assembly; Magnetism; Electrocatalysis; MICROWAVE COMBUSTION SYNTHESIS; MAGNETIC-PROPERTIES; FACILE SYNTHESIS; ZINC FERRITE; CATALYTIC-PROPERTIES; NANOPARTICLES; NANOSTRUCTURES; CLUSTERS; SPHERES; HOLLOW;
D O I
10.1016/j.jmmm.2016.10.038
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Three ZnFe2O4 colloidal nanocrystal assemblies (CNAs), namely CNA1, CNA2 and CNA3, have been synthesized solvothermally with the size of 560 nm, 460 nm and 330 nm and are formed by the self-assembly of primary nanocrystals with the crystallite sizes of 19.2 nm, 15.5 nm and 21.8 nm, respectively. It was found that CNA2 performed superparamagnetic behavior with a saturation magnetization value of 36.9 emu g(-1) while either CNA1 or CNA3 exhibited weak ferromagnetic with a small hysteresis loop and large saturation magnetization. Electrochemical sensing measurements toward the reduction of hydrogen peroxide showed that the peak currents of the CNAs in cyclic voltammograms showed a linear relationship with the concentration of hydrogen peroxide in the experimental conditions and the peak potentials were increased with the order of CNA3, CNA2 and CNA1. The formation mechanism of ZnFe2O4 CNAs had been discussed based on the experimental data. The magnetism and electrocatalysis of the ZnFe2O4 CNAs were supposed to be dependent on the size of primary nanoparticles and the structure of the CNAs.
引用
收藏
页码:155 / 160
页数:6
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