Engineering Function‐Reversal Sacrificial Sites for Selective Volatile Aromatic Hydrocarbons Detection in Complex Environments

Abstract

ABSTRACT Accurately monitoring carcinogenic volatile aromatic hydrocarbons (BTXs) is crucial for assessing air‐qualities and danger‐classes in specific occasions, However, it remains challenging to conduct highly selective identification of them in complex environments. Here, we have developed a gas‐shunting strategy by installing function‐reversal ZnO materials into Ir‐WO 3 supports to diminish interference‐gas responses and guide special aromatic hydrocarbons sensing. We find that ZnO materials can serve as reactively sacrificial sites for small‐molecule H 2 S and CO and induce main aromatic hydrocarbons reactants into Ir‐WO 3 supports. This gas‐shunting route guarantees highly‐selective aromatic hydrocarbons sensing even in dual/ternary gas mixtures. Through integrating functional‐opposite sensors into a system, the final sensing arrays achieve 100% classification accuracy for 10 single gases and 75 multi‐compose gases with low training costs. In addition, we also show an autonomic “cruise‐detection” system by equipping sensor arrays into robotic dog to accurately identify complex gases. Our findings emphasize sensors designs with selective features and may broaden integrated sensing‐system analysis in complex environment.