Low Working‐Temperature Acetone Vapor Sensor Based on Zinc Nitride and Oxide Hybrid Composites

Transition‐metal nitride and oxide composites are a significant class of emerging materials that have attracted great interest for their potential in combining the advantages of nitrides and oxides. Here, a novel class of gas sensing materials based on hybrid Zn₃N₂ and ZnO composites is presented. The Zn₃N₂/ZnO (ZnNO) composites‐based sensor exhibits selectivity and high sensitivity toward acetone vapor, and the sensitivity is dependent on the nitrogen content of the composites. The ZnNO‐11.7 described herein possesses a low working temperature of 200 °C. The detection limit (0.07 ppm) is below the diabetes diagnosis threshold (1.8 ppm). In addition, the sensor shows high reproducibility and long‐term stability.