Title of article :
Rapid synthesis of cerium oxide nanoparticles with superior humidity-sensing performance
Author/Authors :
Thakur، نويسنده , , Sharada and Patil، نويسنده , , Pradip، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2014
Pages :
9
From page :
260
To page :
268
Abstract :
This paper reports a simple and rapid microwave-assisted method for synthesizing cerium oxide (CeO2) nanoparticles for the fabrication of high-performance humidity sensors. The humidity-sensing investigation reveals that the sensor based on CeO2 nanoparticles exhibits a high and linear response within the entire relative humidity (RH) range of 11–97% at an operating frequency of 60 Hz. The corresponding impedance changes by approximately three orders of magnitude within the entire humidity range from 11% to 97%. The response and recovery times are approximately 3 and 16 s, respectively. Additionally, the sensor exhibits a rapid and reversible response characterized by a very small hysteresis (∼1%RH), excellent repeatability, long term stability and a broad range of operation (11–97%RH). The Nyquist impedance plots of the sensor at different RHs were used to elucidate the sensorʹs humidity-sensing mechanism via an electrical equivalent circuit. The experimental results provide a possible method for the rapid synthesis and fabrication of high-performance humidity sensors based on CeO2 nanoparticles.
Keywords :
microwave synthesis , Humidity sensor , X-ray diffraction , Transmission electron microscopy , Nyquist impedance plots , Cerium oxide nanoparticles
Journal title :
Sensors and Actuators B: Chemical
Serial Year :
2014
Journal title :
Sensors and Actuators B: Chemical
Record number :
1442936
Link To Document :
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