Effect of Mn doping on the microstructures and sensing properties of ZnO nanofibers

• DOI: 10.1016/j.apsusc.2014.01.133
• Publication Date: 2014-02-02T11:33:44Z
• Authors: Yuzhen Mao; Shuyi Ma; Xiangbing Li; Caiyun Wang; Faming Li; Xiaohong Yang; Jing Zhu; Lin Ma
• Keywords: Electrospinning; Chemical state

Abstract Zinc oxide (ZnO) nanofibers doped with manganese (Mn) are synthesized by electrospinning followed by calcinations at 580 °C for 150 min. The structure, morphology and element-composition are investigated using X-ray diffraction (XRD), scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS). The results show that the diameters of Mn-doped ZnO nanofibers are from 60 nm to 90 nm corresponding to the amount of Mn from 0 wt% to 2.0 wt%, respectively. XPS spectrum indicates that Mn2+ ions exist in divalent state. The gas sensing properties are significantly affected by the Mn-doped ZnO nanofibers and the operation temperature. The sensors exhibit excellent sensitivity, practical selectivity and stability to acetone with a fast response and recovery time at 340 °C.