WO3/Ru@CeO2 Bilayer Gas Sensor for ppb-Level Xylene Detection Based on a Catalytic-Sensitive Synergistic Mechanism

nanofiber sensor. In addition, the sensor also reacted significantly to low concentrations of xylene, as low as 1 ppb. Additionally, the combination of online mass spectrometry and density functional theory was employed to validate the enhanced sensing performance arising from the synergistic mechanism between the catalytic and sensing materials. Hence, the work presents a new material for detecting ppb level BTEX through an effective bilayer structure design and material selection.