Transactions of Nonferrous Metals Society of China The Chinese Journal of Nonferrous Metals

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中国有色金属学报

ZHONGGUO YOUSEJINSHU XUEBAO

第28卷    第1期    总第226期    2018年1月

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文章编号:1004-0609(2018)-01-0160-07
尖晶石型Zn1-xCoxFe2O4纳米颗粒的制备与性能
朱学良1, 2,魏智强1, 2,谢 柱2,白军善2,武晓娟1,姜金龙2

(1. 兰州理工大学 省部共建有色金属先进加工与再利用国家重点实验室,兰州 730050; 2. 兰州理工大学 理学院,兰州 730050)

摘 要: 以CTAB为表面活性剂,采用水热法成功制备不同掺杂比例的尖晶石型Zn1-xCoxFe2O4(x=0,0.2,0.4,0.6)纳米颗粒,并利用 X 射线衍射(XRD)、高分辨透射电子显微镜(HRTEM)、X射线能量色散分析(EDS)、选区电子衍射(SAED)、傅里叶变换红外光谱(FTIR)和振动样品磁强计(VSM)等测试手段对样品的化学成分、形貌、晶体结构、粒度、光学性能和磁学性能进行表征。结果表明:不同掺杂比例的Zn1-xCoxFe2O4纳米颗粒均为结晶良好的立方尖晶石型结构,Co2+以替代Zn2+的形式掺杂进入到ZnFe2O4晶格中;随着Co掺杂量的增加,晶粒尺寸呈增大趋势,晶格常数发生膨胀。样品形貌为不规则的椭球形颗粒状,粒度比较均匀。纯ZnFe2O4纳米晶在室温下呈现超顺磁性,掺杂样品在室温下都具有明显的铁磁性。

 

关键字: Co掺杂;铁酸锌;晶体结构;光学性能;磁性能

Preparation and characterization of spinel Zn1-xCoxFe2O4 nanoparticles
ZHU Xue-liang1, 2, WEI Zhi-qiang1, 2, XIE Zhu2, BAI Jun-shan2, WU Xiao-juan1, JIANG Jin-long2

1. State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals, Lanzhou University of Technology, Lanzhou 730050, China; 2. School of Science, Lanzhou University of Technology, Lanzhou 730050, China

Abstract:Spinel Zn1-xCoxFe2O4 (x=0, 0.2, 0.4, 0.6) nanoparticles with different consistency ratio were successfully prepared via hydrothermal method using CTAB as surface active agent. The chemical composition, morphology, crystal structure, particle size, optical properties and magnetic properties of the products by this process were investigated by X-ray diffraction (XRD), high resolution transmission electron microscopy (HRTEM) and the corresponding selected area electron diffraction (SAED), X-ray energy dispersive spectrometry (XEDS), FTIR spectroscopy (FTIR) and vibrating sample magnetometer (VSM). The results show that Zn1-xCoxFe2O4 nanoparticles with different consistency ratio prepared by this method are cubic spinel structure with good crystallization. In the form of doping, Co2+ enters into the lattice of ZnFe2O4 to replace Zn2+. The grain size decreases and the lattice constant occurs expansion with the increase of Co concentration. The shape of the sample is irregular ellipsoid, and the particle size is relatively uniform. The pure ZnFe2O4 nanocrystals show super paramagnetic properties at room temperature, and the doped samples have obvious ferromagnetic properties at room temperature.

 

Key words: Co doped; ZnFe2O4; crystal structure; optical property; magnetic property

ISSN 1004-0609
CN 43-1238/TG
CODEN: ZYJXFK

ISSN 1003-6326
CN 43-1239/TG
CODEN: TNMCEW

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