The Key Laboratory of Biomimetic Sensing and Advanced Robot Technology, Institute of Intelligent Machines, CAS, Hefei 230026, People's Republic of China. Department of Chemistry, School of Chemistry and Materials, University of Science and Technology of China, Hefei 230026, People's Republic of China.
Nanotechnology. 2008 Jun 18;19(24):245611. doi: 10.1088/0957-4484/19/24/245611. Epub 2008 May 9.
Highly porous cadmium oxide (CdO) nanowires have been prepared by calcining the hydroxy- and carbonate-containing cadmium compound precursor nanowires. The large-scale precursor nanowires were synthesized through a hydrothermal method. Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) were employed to characterize and analyze the as-synthesized precursor nanowires as well as the calcined products. It was revealed that the wire-like morphology of the precursor was fundamentally retained during the process of calcination and the CdO nanowires obtained were polycrystalline with highly porous structures. In order to illustrate the formation mechanism of the porous structures, the morphology and composition evolutions of the precursor nanowires under different stages of the calcining process were further investigated via SEM, x-ray diffraction (XRD) and infrared (IR) absorbance spectroscopy. Gas sensing has been explored for the sensor device fabricated with highly porous CdO nanowires, which demonstrates that it has good response owing to its special structures and great selectivity to NO(x). Furthermore, the UV-visible and photoluminescence spectra of highly porous CdO nanowires have also been investigated.
高度多孔的氧化镉（CdO）纳米线是通过煅烧含有羟基和碳酸盐的镉化合物前体纳米线制备的。大规模的前体纳米线是通过水热法合成的。扫描电子显微镜（SEM）和透射电子显微镜（TEM）用于对合成的前体纳米线以及煅烧产物进行表征和分析。结果表明，在煅烧过程中，前体的线状形态基本得到保留，所获得的 CdO 纳米线为多晶，具有高度多孔的结构。为了说明多孔结构的形成机制，通过 SEM、X 射线衍射（XRD）和红外（IR）吸收光谱进一步研究了前体纳米线在煅烧过程不同阶段的形态和组成演变。用高度多孔的 CdO 纳米线制造的传感器器件进行了气体传感研究，结果表明，由于其特殊的结构和对 NOx 的高选择性，它具有良好的响应。此外，还研究了高度多孔的 CdO 纳米线的紫外-可见和光致发光光谱。
