Hierarchical and Hollow Fe2O3 Nanoboxes Derived from Metal-Organic Frameworks with Excellent Sensitivity to H2S.
Hierarchical and Hollow Fe2O3 Nanoboxes Derived from Metal-Organic Frameworks with Excellent Sensitivity to H2S.
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DOI：
10.1021/acsami.7b07069
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发表时间：
2017-08
影响因子：
9.5
通讯作者：
Kuan Tian;Xiao-Xue Wang;Zhuying Yu;Huayao Li;Xin Guo
中科院分区：
文献类型：
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作者：
Kuan Tian;Xiao-Xue Wang;Zhuying Yu;Huayao Li;Xin Guo
利用金属有机骨架（MOFs）制备了分层中空多孔Fe2O3纳米盒（平均边长约500 nm），并对其气感特性进行了研究。基于Fe2O3纳米盒的传感器在200℃下的响应（电阻比）为1.23 ~ 0.25 ppm （ppm）硫化氢（H2S），响应/恢复速度快，对H2S的选择性好。值得注意的是，该传感器在50°C下对5 ppm H2S表现出完全可逆的响应，表明其有望在接近室温的条件下工作，这有利于医疗诊断和室内外环境监测。Fe2O3纳米盒的优异性能可归因于其独特的高比表面积（SSA）和多孔纳米结构。
Hierarchical and hollow porous Fe2O3 nanoboxes (with an average edge length of ∼500 nm) were derived from metal-organic frameworks (MOFs) and the gas sensing characteristics were investigated. Sensors based on Fe2O3 nanoboxes exhibited a response (resistance ratio) of 1.23 to 0.25 ppm (ppm) hydrogen sulfide (H2S) at 200 °C, the response/recovery speed is fast and the selectivity to H2S is excellent. Remarkably, the sensor showed fully reversible response to 5 ppm of H2S at 50 °C, demonstrating its promise for operating at near room temperature, which is favorable for medical diagnosis and indoor/outdoor environment monitoring. The excellent performance of the Fe2O3 nanoboxes can be ascribed to the unique morphology with high specific surface area (SSA) and porous nanostructure.