摘要
用SnCl4·5H2O和乙二醇作为前驱体，采用一锅溶剂热法合成单分散SnO2纳米球和纳米颗粒，用X射线粉末衍射（XRD）、扫描电镜（SEM）、透射电镜（TEM）、傅立叶红外吸收光谱（VT—IR）和紫外吸收光谱等手段对产物的结构、形貌进行表征，考察了反应时间对SnO2的形貌特征的影响，XRD的结果表明，合成得到的SnO2为金红相的结构SnO2；SEM和TEM观察结果显示，SnO2的形貌随反应时间的改变而改变，随着反应时间的增加，SnO2最终从单分散纳米球变成纳米颗粒；在红外吸收光谱分析的基础上对溶剂热反应机理进行了讨论；紫外吸收光谱的谱图表明合成得到的SnO2有较好的光电性能。
Monodisperse SnO2 nanospheres and nanoparticles were prepared by one-pot solvothermal method, using SnCl4·5H2O and ethylene glycol as precursor. The obtained samples were characterized by X-ray diffraction（XRD）, scan electron microscope（SEM）, transmission electron Microscope （TEM）, Fourier-transformed infrared spectra （FT-IR） and ultraviolet absorption spectrum. The effect of reaction time on the morphologies of SnO2 was investigated. The XRD results showed that the obtained SnO2 was in rutile structure. The results from the SEM and TEM examinations revealed that the morphology of SnO2 changed with the reaction time, with the increase of reaction time, SnO2 changed from monodisperse nanospheres into nanoparticles.The mechanism of the solvothermal reaction was discussed in the base of the analysis on infrared absorption spectroscopy.The ultraviolet absorption spectrum suggested that the obtained SnO2 have better optical and electrical properties
基金
中央高校基本科研业务费专项基金项目（SWJTU11CX058）,国家重大科学研究计划资助项目（编号2012CB933602）
