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

IF 26.6 1区材料科学 Q1 Engineering

Nano-Micro Letters Pub Date : 2025-05-26 DOI:10.1007/s40820-025-01770-9

Yihong Zhong, Guotao Yuan, Dequan Bao, Yi Tao, Zhenqiu Gao, Wei Zhao, Shuo Li, Yuting Yang, Pingping Zhang, Hao Zhang, Xuhui Sun

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Abstract

Highlights

The heteroatom atomically doping strategy was reported to construct highly efficient sites on metal oxides for the detection of low-concentration gas.
The atomically dispersed Sn atoms were intentionally incorporated into the Fe₂O₃ lattice during the oxidative annealing of Fe-based metal organic framework, leading to specific Sn–O–Fe sites, porous structures, and abundant oxygen vacancies.
The optimized Sn-Fe₂O₃ exhibited exceptional sensing performance for NO₂ detection: ultra-high sensitivity (Rg/Ra=2646.6 to 1 ppm NO₂), ultra-low limit of detection (10 ppb), and high selectivity.

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原子sn掺杂多孔Fe2O3的特异Sn-O-Fe活性位点用于超灵敏NO2检测

杂原子原子掺杂策略在金属氧化物上构建了高效的检测低浓度气体的位点。在fe基金属有机骨架的氧化退火过程中，原子分散的Sn原子被有意地结合到fe2o3晶格中，导致特定的Sn - o - fe位点、多孔结构和丰富的氧空位。优化后的Sn-Fe2O3具有超高灵敏度（Rg/Ra=2646.6 ~ 1 ppm NO2）、超低检测限（10 ppb）、高选择性等优异的NO2检测性能。

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来源期刊

Nano-Micro Letters NANOSCIENCE & NANOTECHNOLOGY-MATERIALS SCIENCE, MULTIDISCIPLINARY

CiteScore

32.60

自引率

4.90%

发文量

981

审稿时长

1.1 months

期刊介绍： Nano-Micro Letters is a peer-reviewed, international, interdisciplinary, and open-access journal published under the SpringerOpen brand. Nano-Micro Letters focuses on the science, experiments, engineering, technologies, and applications of nano- or microscale structures and systems in various fields such as physics, chemistry, biology, material science, and pharmacy.It also explores the expanding interfaces between these fields. Nano-Micro Letters particularly emphasizes the bottom-up approach in the length scale from nano to micro. This approach is crucial for achieving industrial applications in nanotechnology, as it involves the assembly, modification, and control of nanostructures on a microscale.