| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 742272 | Sensors and Actuators B: Chemical | 2016 | 8 Pages |
•ZnO hollow spheres were synthesized via a PSS template.•ZnO hollow spheres based gas sensor shows a high response towards n-butanol.•Sensor has good repeatability, stability, fast response and recovery towards n-butanol.•Hollow structure increases surface area and oxygen specie to promote oxidation of n-butanol.
ZnO hollow spheres with high crystallinity were prepared successfully via a simple template process using ZnCl2, carbamide and polystyrene spheres (PSS) as raw materials. The structural and morphological characterizations of the samples were carried out by X-ray diffraction (XRD), transmission electron microscopy (TEM), and X-ray photoelectron spectroscopy (XPS), respectively. Indirect-heating sensor using ZnO hollow spheres as sensing materials was fabricated on an alumina tube with Au electrodes and Pt wires. The gas sensing properties of the as-synthesized ZnO hollow spheres for n-butanol were investigated. It is shown that the sensor exhibited good sensing performances, characterized by high response, very short response time, and stability to n-butanol gas at operating temperature of 385 °C. These results indicate that the ZnO hollow spheres are highly promising candidates for practical detectors for n-butanol.
Graphical abstractZnO hollow spheres based sensor exhibits high response, very short response and recovery time, and stability to n-butanol gas at operating temperature of 385 °C.Figure optionsDownload full-size imageDownload as PowerPoint slide
