(1. 蘭州理工大學(xué) 省部共建有色金屬先進(jìn)加工與再利用國(guó)家重點(diǎn)實(shí)驗(yàn)室，蘭州 730050； 2. 蘭州理工大學(xué) 理學(xué)院，蘭州 730050)
摘 要: 以CTAB為表面活性劑，采用水熱法成功制備不同摻雜比例的尖晶石型Zn1-xCoxFe2O4(x=0，0.2，0.4，0.6)納米顆粒，并利用 X 射線衍射(XRD)、高分辨透射電子顯微鏡(HRTEM)、X射線能量色散分析(EDS)、選區(qū)電子衍射(SAED)、傅里葉變換紅外光譜(FTIR)和振動(dòng)樣品磁強(qiáng)計(jì)(VSM)等測(cè)試手段對(duì)樣品的化學(xué)成分、形貌、晶體結(jié)構(gòu)、粒度、光學(xué)性能和磁學(xué)性能進(jìn)行表征。結(jié)果表明：不同摻雜比例的Zn1-xCoxFe2O4納米顆粒均為結(jié)晶良好的立方尖晶石型結(jié)構(gòu)，Co2+以替代Zn2+的形式摻雜進(jìn)入到ZnFe2O4晶格中；隨著Co摻雜量的增加，晶粒尺寸呈增大趨勢(shì)，晶格常數(shù)發(fā)生膨脹。樣品形貌為不規(guī)則的橢球形顆粒狀，粒度比較均勻。純ZnFe2O4納米晶在室溫下呈現(xiàn)超順磁性，摻雜樣品在室溫下都具有明顯的鐵磁性。
關(guān)鍵字: Co摻雜；鐵酸鋅；晶體結(jié)構(gòu)；光學(xué)性能；磁性能
（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
