Journal
SENSORS AND ACTUATORS B-CHEMICAL
Volume 352, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2021.131061
Keywords
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Funding
- National Key Research Program of China [2016YFA0201004]
- Science and Technology Program of Guangzhou [2019050001]
- National Science Foundation of China [12074111, 11574091]
- National Science Foundation of Guangdong Province [2019A1515011128]
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The sensor based on Ru-doped porous hollow SnO2 nanotubes exhibits excellent sensing performance towards acetone, with a fast response time and high selectivity. The enhanced gas sensing properties are attributed to the larger specific surface area, ultra-fine grain size of SnO2, and the catalytic effect of RuO2. This research suggests the potential of Ru-doped SnO2 nanotubes as highly reliable and high-performance sensing layers for acetone gas sensors.
Ru-doped porous hollow SnO2 nanotubes were prepared by simple electmspinning method, and their crystal structures, morphologies, and formation mechanism of porous hollow nanotubes were fully elucidated. The sensor based on the porous hollow Ru-doped SnO2 nanotubes shows an excellent sensing response of similar to 340 with ultrafast response time of 0.58 s at 250 degrees C to 100 ppm acetone. Moreover, the sensor exhibits good stability and excellent selectivity. Finally, the mechanism of the enhanced gas sensing properties was explained as the comprehensive effects of the larger specific surface area resulted from the hollow porous nanotubes structure, the ultra-fine SnO2 grain size, and the catalyst of RuO2. This research suggests the Ru-doped SnO2 nanotubes have the potential to be used as highly reliable and high-performance sensing layer for acetone gas sensors.
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