Investigation of Electrical and Gas Sensing Properties of CeO2 Nanoparticle Synthesized by Precipitation Method

Author(s)	Pratik Vitthal Darade, Rushikesh Gorakh Bhamare, Janardan MaharuShewale Shewale
Country	India
Abstract	In the present research work, pure CeO₂ nanoparticles (NPs) were successfully synthesized using the precipitation method with cerium (III) nitrate hexahydrate [Ce(NO₃)₃·6H₂O] as a precursor. The synthesized CeO₂ NPs were employed to fabricate thick films via the standard screen-printing technique, and their electrical as well as gas sensing properties were systematically studied. The prepared CeO₂ thick films exhibited a resistivity of 5939.03 Ω/m with a negative temperature coefficient of resistance (TCR) value of –0.002815 /°C, confirming their semiconducting behavior. The activation energy values were found to be 0.0546 eV in the low-temperature region (LTR) and 0.2421 eV in the high-temperature region (HTR). Gas sensing analysis revealed that the CeO₂ NPs thick films showed maximum response toward NH₃ gas, with a sensitivity of 76.95% at 120 °C for 1000 ppm concentration, along with fast response and recovery times. These results suggest that CeO₂ NPs thick films are promising candidates for efficient and selective NH₃ gas sensing applications.
Keywords	Hexahydrate, NH₃ gas, sensitivity, electrical, Gas sensing, response time.
Field	Physics > Energy
Published In	Volume 16, Issue 3, July-September 2025
Published On	2025-08-26

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