Currently, the development of semiconducting metal oxide (SMO)-based gas sensors with innovative modification and three-dimensional (3D) structural designs has become a significant scientific interest due to their potential for addressing key technological challenges. Herein, gas sensing devices based on the 3D hierarchical monoclinic-type structural Sb-doped WO₃ (HMSW) gas sensing material were successfully constructed by ordered assembly of urchin-like monoclinic-type structural (P2/m) Sb-doped WO_2.72 (W₁₈O₄₉) (UMSW) nanocrystals and nanowires. The crystalline microstructure, composition, morphological characteristics, and possible growth mechanisms were systematically investigated. The results of the gas sensor measurements, performed simultaneously on multiple samples, indicated that the 3D HMSW material has superior sensitivity (S = 122) and high selectivity to ppm-level NO₂ at 30 °C with a significantly larger response than the best-reported values from other WO₃-based gas sensors fabricated so far. All the results clearly demonstrate that the combined effects of abundant structural defects derived from Sb doping modification, reduced band gap, and 3D hierarchical microstructure synergistically play a key role in the NO₂ gas sensing performance. Such excellent gas sensing performance foresees the great potential application of 3D hierarchical structural WO₃-based sensors for fast and effective detection of toxic gases that can aid in human health and public safety.

Hydrogels are soft, tissue‐like materials that have great potential as wound dressings. However, most hydrogels are unsatisfactory in achieving whole‐layer regeneration of diabetic wounds due to the complex pathological microenvironment and irregular wound shapes. Here, a glucose‐responsive and self‐adaptive phenylboronic acid (PBA) hydrogel solubilized strong antioxidant flavonoids (Gel‐Flavonoids) is developed via dynamic borate bonds. The Gel‐Flavonoids system can spontaneously confirm to the irregular wound shape and release flavonoids in a high‐glucose microenvironment to effectively eliminate reactive oxygen species (ROS). The optimized Gel‐Flavonoids demonstrate remarkable efficacy in inhibiting inflammation and activating fibroblasts and endothelial cells through CD36‐activated lipid metabolism in macrophages and is significantly superior to commercial dressings (3M) in healing rate (> 93%, 14 days) and whole‐layer regeneration effect. This study obtained a multidimensional Gel‐Flavonoids system to effectively repair diabetic wounds, and reveal the underlying therapeutic mechanisms, offering a promising insight to guide the development of medical materials to treat diabetic wounds.