Journal
SENSORS AND ACTUATORS B-CHEMICAL
Volume 393, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2023.134210
Keywords
Cerium oxide; Electrospinning; Dopant; Nanofibers; Heterojunction; Humidity
Ask authors/readers for more resources
The use of tungsten-doped cerium dioxide hollow nanofibers as gas sensors can effectively solve the issue of humidity interference and improve the sensor's response to ethanol.
Serious interference of humidity limits the wide application of ethanol gas sensors. The transition metal tungsten (W) doped cerium dioxide (CeO2), possessing a hydrophobic nature and rich oxygen vacancies, will tackle the humidity issue. Herein, the pristine and W-doped CeO2 hollow nanofibers were successfully fabricated by electrospinning. Oxygen vacancy content increases first and then decreases with the doping tungsten, and the 1 mol% W-doped CeO2 sample presents the largest content. Further, the 1 mol% W-doped CeO2 sensor exhibits an excellent response of 10.2 to 100 ppm ethanol at 200 degrees C, 3.5 times higher than the pure CeO2 sensor, good selectivity, repeatability, and long-term stability. In addition, the responses of the W-CeO2 sensors are almost humidity independent. The resistances in air and ethanol decrease gradually with the humidity increases, leading to the humidity-resistant response, mainly attributed to the hindered carrier migration by the type-I CeO2/WO3 heterojunction. These results indicate that the appropriate W-doped CeO2 is a potential humidity-resistant gassensing material for ethanol sensing.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available