期刊
SENSORS AND ACTUATORS B-CHEMICAL
卷 281, 期 -, 页码 885-892出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2018.10.124
关键词
One-dimensional (1D) nanostructure; Metal-organic frameworks (MOFs); alpha-Fe2O3/NiFe2O4 nanotubes; High response; Acetone; Gas sensor
资金
- Natural Science Foundation Committee (NSFC) [61673191]
- Science and Technology Development Plan of Jilin Province [20180414025 GH]
- Graduate Innovation Fund of Jilin University [2017028]
The key challenge to develop gas sensors with high performances lies in the novel design of superior functional materials for effective reactions between target gases and sensing layers. Metal-organic frameworks (MOFs) have emerged as versatile candidates for preparation of ideal nanostructured materials with controllable composition, various structures and tunable pore size. Herein, a series of Fe-based and Fe/Ni-based one-dimensional (1D) nanostructures using MOFs as templates were prepared systematically. As a result of the hollow structure and nanohybrid features, the optimized alpha-Fe2O3/NiFe2O4 nanotubes can exhibit high specific surface area (118.03 m(2) g(-1)) and provide a mass of active sites compared to individual components (alpha-Fe2O3 nanowires and NiFe2O4 nanowires), which is beneficial to improve the response (R-a/R-g = 23) to acetone vapors. In addition, the smart design also endows the sensor based on alpha-Fe2O3/NiFe2O4 nanotubes with good selectivity, fast response time (4 s) and long-term stability (30 days). In this work, the advantages of 1D hollow heterogeneous materials will provide a new perspective of MOF-derived nanostructures for the particular application in acetone gas sensors.
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