Specific Sn-O-Fe Active Sites from Atomically Sn-Doping Porous Fe₂O₃ for Ultrasensitive NO₂ Detection.

ABSTRACT: Conventional gas sensing materials (e.g., metal oxides) suffer from deficient sensitivity and serve cross-sensitivity issues due to the lack of efficient adsorption sites. Herein, the heteroatom atomically doping strategy is demonstrated to significantly enhance the sensing performance of metal oxides-based gas sensing materials. Specifically, the Sn atoms were incorporated into porous Fe₂O₃ in the form of atomically dispersed sites. As revealed by X-ray absorption spectroscopy and atomic-resolution scanning transmission electron microscopy, these Sn atoms successfully occupy the Fe sites in the Fe₂O₃ lattice, forming the unique Sn-O-Fe sites. Compared to Fe-O-Fe sites (from bare Fe₂O₃) and Sn-O-Sn sites (from SnO₂

SUBMITTER: Zhong Y 

PROVIDER: S-EPMC12104129 | biostudies-literature | 2025 May

REPOSITORIES: biostudies-literature