Abstract
Effective detection of toxic and hazardous gases is crucial for ensuring human safety, and high-performance metal oxide-based gas sensors play an important role in achieving this goal. In(2)O(3) is a widely used n-type metal oxide in gas sensors, and various In(2)O(3) nanostructures have been synthesized for detecting small gas molecules. In this review, we provide a brief summary of current research on In(2)O(3)-based gas sensors. We discuss methods for synthesizing In(2)O(3) nanostructures with various morphologies, and mainly review the sensing behaviors of these structures in order to better understand their potential in gas sensors. Additionally, the sensing mechanism of In(2)O(3) nanostructures is discussed. Our review further indicates that In(2)O(3)-based nanomaterials hold great promise for assembling high-performance gas sensors.