Superior acetone gas sensor based on electrospun SnO2 nanofibers by Rh doping
| Autor: | Xueying Kou, Lanlan Guo, Qingji Wang, Yanfeng Sun, Tianshuang Wang, Fang Chen, Ning Xie, Geyu Lu, Chong Wang, Hong Zhang, Jian Ma |
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| Rok vydání: | 2018 |
| Předmět: |
Materials science
Nanotechnology 02 engineering and technology 010402 general chemistry Hot pressing 01 natural sciences law.invention chemistry.chemical_compound law Materials Chemistry Acetone Calcination Electrical and Electronic Engineering Instrumentation Polyaniline nanofibers Doping Metals and Alloys 021001 nanoscience & nanotechnology Condensed Matter Physics Electrospinning 0104 chemical sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials Nanocrystal chemistry Chemical engineering Nanofiber 0210 nano-technology |
| Zdroj: | Sensors and Actuators B: Chemical. 256:861-869 |
| ISSN: | 0925-4005 |
| Popis: | Undoped and 0.2-1.0 mol% Rh-doped SnO2 nanofibers were fabricated using electrospinning combined with calcination treatment. The fibrous morphology of these nanofibers were maintained and the grain size of the SnO2 nanocrystals were greatly decreased after Rh doping. Sensors based on these nanofibers were fabricated through a hot pressing mathod. The gas sensing properties of these nanofibers were investigated systematically. The results indicated that the response to 50 ppm acetone of 0.5 mol% Rh-doped SnO2 nanofibers was 60.6, which was 9.6 times higher than that of undoped SnO2 nanofibers. In addition, the Rh-doped SnO2 nanofibers showed a decreased cross-response to ethanol, whereas pure SnO2 naofibers did not show selective detection of ethanol and acetone gases. The doping of Rh ions into SnO2 nanocrystals modulates the electron concentration, and induces the changes of the oxygen vacancies and chemisorbed oxygen of SnO2 naofibers. Thus, the doping of Rh3+ into SnO2 nanofibers should be a promising method for designing and fabricating acetone gas sensor with high gas sensing performance. |
| Databáze: | OpenAIRE |
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