High Selectivity and Sensitivity Gas Sensors to N-Butanol Based on Ni-Doped Ultra-Thin Porous Single-Crystalline Zno Nanosheets

Abstract

Ni doped porous single-crystalline (PSC) ZnO nanosheets were successfully synthesized through a facile wet-chemical method. The as-prepared products were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and energy dispersive spectrum (EDS).It can be found that the Ni doped PSC ZnO nanosheets with a few micrometers in length and 8–10 nm in thickness. The gas sensing properties of the Ni doped PSC ZnO nanosheets were systematically investigated. And the results reveal that the 2 at% Ni doped PSC ZnO nanosheets shows dramatically high sensitivity and selectivity for the detection of n-butanol compared to the performance of pure ZnO nanosheets. The as-prepared products combined the advantages of porous structure, single-crystalline, and ultra-thin thickness, and Ni doping, which definitely resulted in high sensing performance and selectivity property in n-butanol detection. Therefore, the doping of Ni into PSC ZnO nanosheets may be a promising method to develop advanced nanomaterials for the practical application of n-butanol detection in complex gas atmosphere.

Keywords: Ni doped ZnO, porous single-crystalline, nanosheets, n-butanol, high selectivity