Electrospun ZnO nanotubes and its gas sensing applications

• Published in: Physica. E, Low-dimensional systems & nanostructures Vol. 52; pp. 92 - 96
• Main Authors: Yu, Xin, Song, Fang, Zhai, Bing, Zheng, Chuantao, Wang, Yiding
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 01-08-2013; Elsevier
• Subjects: Acetone; Catalytic methods; Condensed matter: structure, mechanical and thermal properties; Cross-disciplinary physics: materials science; rheology; Electrospinning; Exact sciences and technology; Gas sensing; Low-dimensional structures (superlattices, quantum well structures, multilayers): structure, and nonelectronic properties; Materials science; Methods of nanofabrication; Nanoscale materials and structures: fabrication and characterization; Nanotube; Nanotubes; Physics; Solid surfaces and solid-solid interfaces; Surfaces and interfaces; thin films and whiskers (structure and nonelectronic properties); ZnO; Electrospinning; ZnO; Gas sensing; Nanotube; Acetone; Temperature dependence; Scanning electron microscopy; Nanotubes; Selectivity; XRD; PVP; One dimensional structure; Precursor; Transmission electron microscopy; Adsorption; Morphology; Surface area; Gas detector
• ISSN: 1386-9477; 1873-1759
• DOI: 10.1016/j.physe.2013.03.030

One dimensional ZnO structures which have uniform, small diameter and high ratio of length to diameter were prepared by a simple vertical electrospinning method, and characterized by XRD, SEM, TEM and N2 adsorption experiments. By adjusting the content of Polyvinylpyrrolidone (PVP) (Mw≈1,300,000) or inorganic precursors, the morphology can be controlled. Finally, the nanotubes with the diameter of about 95nm were obtained, and its gas sensing properties were under research. For its high surface area, the gas sensing properties were improved greatly. The results indicate that the prepared material in this work has excellent selectivity to acetone and the sensitivity can achieve a maximum at the optimum working temperature. After testing two cycles at each concentration, the response is stable and repeatable. Moreover, ZnO nanotubes have fast response (∼5s) and recovery (∼10s) time. At last, the mechanism of ZnO nanotubes response on acetone was proposed in detail.
•One dimensional ZnO structures were prepared by a vertical electrospinning method.•ZnO nanotubes with the diameter of about 95nm were obtained.•The prepared material has excellent selectivity to acetone.•The sensitivity can achieve a maximum at the optimum working temperature.•ZnO nanotubes have fast response (∼5s) and recovery (∼10s) time.