Abstract
Recently, metal organic frameworks (MOFs) materials with varied shapes and tunable pore sizes have been regarded as ideal templates for preparing porous metal oxides. In this work, porous α-Fe2O3 spindles were prepared by using Fe-MIL-88 as the precursor and successfully combined with Au nanoparticles (Au NPs). Meanwhile, the components and morphologies of Au/α-Fe2O3 nanocomposites were characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), energy dispersive spectrometer (EDS), transmission electron microscope (TEM), and X-ray photoelectron spectroscopy (XPS). Characterization results revealed that Au nanoparticles were homogeneously attached on the surface of porous α-Fe2O3 spindles. Gas-sensing tests exhibit that Au/α-Fe2O3 nanocomposites show higher response, excellent selectivity and fast response and recovery towards triethylamine (TEA). This work confirms the advantages of Au catalyst-loaded and MOF-derived porous nanostructures in gas detection.
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