In2O3纳米线阵列的合成及表征

采用SBA-15硬模板复制技术合成纳米In₂O₃样品, 并用X射线衍射（XRD）、 扫描电子显微镜（SEM）、 紫外可见光谱对样品的晶体结构、 晶粒尺寸、 形貌及带隙宽度进行测试, 分析样品的纳米结构对气敏性能的影响机制. 结果表明: 样品为纳米线阵列结构, 三维In₂O₃纳米线阵列结构由粒径约为15 nm的单晶近球形In₂O₃颗粒规则有序排列组成, 间距约为1 nm, 带隙宽度为3.63 eV; 当温度为320 ℃, 乙醇气体在空气中的体积比为10^-4时, 其灵敏度达42.3. 该纳米结构样品明显优于相同级别纳米颗粒和纳米介孔材料的气敏性能. 

Synthesis and Characterization of Indium Oxide Nanowire Arrays

Indium oxide (In₂O₃) sample was synthesized by using SBA 15 hard templates replication technique. The crystal structure, grain size, morphology andbandgap width of the sample were characterized and by X ray diffraction (XRD), scanning electron microscopy (SEM) and UV Visible spectra,and the influence mechanism of nanostructure on gas sensing property was analyzed. The results show that the structure of sample is nano arrays. The three dimensional In₂O₃ nano arrays are composed of the regular arrangement of single crystal subglobose In₂O₃ particles with adiameter of about 15 nm, and the spacing of interwires is about 1 nm and the bandgap width is 3.63 eV. When the temperature is 320 ℃, the volume ratio of ethanol gas in air is 10^-4, the sensitivity is 42.3. The gas sensing properties of the nanostructured samples are better than those of the same grade nanoparticles and mesoporous nanomaterials.