非阻塞I/O
丙酮
材料科学
多孔性
化学工程
退火(玻璃)
催化作用
检出限
双金属
微观结构
纳米技术
金属有机骨架
工作温度
化学
复合材料
色谱法
有机化学
吸附
热力学
物理
工程类
作者
Jiaqi Yang,Bin Jiang,Xi Wang,Chong Wang,Yanfeng Sun,Hong Zhang,Kengo Shimanoe,Geyu Lu
标识
DOI:10.1016/j.snb.2022.131985
摘要
Exploring sensing materials with superior catalytic properties is of paramount importance for acetone detection. In this work, NiO/NiFe2O4 nanocubes derived from Ni/Fe bimetal metal-organic frameworks (MOFs) precursors are synthesized by one-step impregnation method and subsequent annealing process. The microstructure and morphology of the synthesized samples are investigated by a series of characterization. The results indicate that uniform and porous NiO/NiFe2O4 nanocubes are formed. The gas sensing properties of NiO/NiFe2O4 composites are systematically evaluated. Benefitting from the synergistic effect of abundant sites, p-p junction and high surface area, the optimal sensors based on NiO/NiFe2O4 (Ni/Fe=1.5 at) exhibit the best sensing performance. The sensors show the highest response (19.9–100 pm acetone), short response/recovery times (2.4 s/19.6 s), low detection limit (200 ppb) and a good humidity tolerance ((S35% RH-S95% RH)/S35% RH= 0.095) to acetone at 200 °C. The results offer us a promising alternative to develop an ideal platform for acetone detection.
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