Bismuth ferrite based acetone gas sensor: evaluation of graphene oxide loading

Area of Science:

• Materials Science
• Chemical Engineering
• Sensor Technology

Background:

• Perovskite materials, such as bismuth ferrite (BiFeO3), are explored for gas sensing.
• Graphene oxide (GO) is investigated as a modifier to enhance material properties.

Purpose of the Study:

• To synthesize and characterize a BiFeO3/graphene oxide (BFO/GO) composite for acetone gas sensing.
• To evaluate the gas sensing performance of the BFO/GO composite for various gases.

Main Methods:

• CTAB-functionalized glycine combustion synthesis of BFO/GO.
• Physicochemical characterization using XRD, FE-SEM, TEM, HRTEM, EDAX, and XPS.
• Gas sensing performance evaluation at 500 ppm concentration and varying temperatures.

Main Results:

• The BFO/GO composite exhibited superior acetone selectivity (61% response) compared to pristine BFO.
• GO loading significantly improved sensitivity, response/recovery times, and stability.
• The 1 wt% GO-loaded BFO sensor achieved a maximum sensitivity of 89% for acetone at 250 °C.

Conclusions:

• The synthesized BFO/GO composite demonstrates excellent potential for acetone gas sensing applications.
• Graphene oxide integration enhances the gas sensing capabilities of bismuth ferrite.