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利用静电纺丝技术结合热处理方法制备了一维多孔结构的In2O3纳米纤维。借助扫描电子显微镜(SEM)和透射电子显微镜(TEM)观察纳米纤维的形貌结构;利用热重分析仪(TGA)分析前驱体复合纳米纤维的热处理过程;采用X射线衍射仪(XRD)分析不同煅烧温度下所得In2O3的晶体结构;利用四探针测试In2O3纳米纤维的导电性,并探讨煅烧温度对其导电性的影响。结果表明:静电纺前驱体复合纳米纤维成型良好,且经不同温度煅烧后产物仍保持纤维结构,但纤维直径明显减小。不同温度下煅烧所得In2O3均为立方铁锰矿型,随着煅烧温度的升高,In2O3纳米颗粒逐渐增大,晶体更加完整,导电性逐渐增强。
One-dimensional porous In2O3 nanofibers were prepared by electrospinning combined with heat treatment. The morphology of the nanofibers was observed by means of scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The heat treatment process of the precursor nanofibers was analyzed by TGA. The differences between the nanofibers were analyzed by X-ray diffraction (XRD) The crystal structure of In2O3 obtained at calcination temperature was studied. The conductivity of In2O3 nanofibers was measured by four probes, and the effect of calcination temperature on the conductivity was also discussed. The results showed that the electrospun precursor nanofibers were well formed and the products retained the fiber structure after calcined at different temperatures, but the diameter of the fibers decreased obviously. In2O3 calcined at different temperatures are cubic bismuth type, with the calcination temperature increases, In2O3 nanoparticles gradually increased, the crystal is more complete, the conductivity increased gradually.