Back to Search
Start Over
Highly sensitive VOCs-acetone sensor based on Ag-decorated SnO2 hollow nanofibers.
- Source :
-
Journal of Alloys & Compounds . May2017, Vol. 703, p572-579. 8p. - Publication Year :
- 2017
-
Abstract
- A certain amount of silver (Ag)-decorated tin dioxide (SnO 2 ) hollow nanofibers are successfully synthesized by electrospinning technique followed by silver nitrate (AgNO 3 ) treatment at 200 °C for 2 h in air. The crystallization, element composition, microstructure and morphology are investigated using X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), transmission electron microscope (TEM) and Brunauer-Emmett-Teller (BET) method, respectively. The characterizations show that the crystalline Ag/SnO 2 composites have porous tubular structure with inside diameters of about 220 nm and lengths of several ten microns. The gas-sensing measurements indicate that the Ag-decorated SnO 2 sensor based on the SnO 2 hollow nanofibers shows high response, fast response-recovery capability and excellent selectivity to acetone at low operating temperature of 160 °C. The sensor can effectively detect the low concentration of acetone vapor (about 5 ppm), and the response and recovery time to 50 ppm acetone are around 6 s and 10 s, respectively. The remarkable improvement in gas sensing properties is attributed to the unique 1D hollow nanostructure, the outstanding catalytic oxidation activity of noble metals and p-n hetero interface formed between p-type Ag 2 O and n-type SnO 2 . [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 09258388
- Volume :
- 703
- Database :
- Academic Search Index
- Journal :
- Journal of Alloys & Compounds
- Publication Type :
- Academic Journal
- Accession number :
- 121452462
- Full Text :
- https://doi.org/10.1016/j.jallcom.2017.01.348