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Published on: December 6, 2021
Highly porous CdO nanowires: preparation based on hydroxy- and carbonate-containing cadmium compound precursor
Zheng Guo1, Minqiang Li, Jinhuai Liu
1The 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.
Abstract:
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.
