Spindle-like Fe2O3/ZnFe2O4 porous nanocomposites derived from metal-organic frameworks with excellent sensing performance towards triethylamine

Recently, metal-organic frameworks (MOF)-derived porous metal oxide nanostructures have emerged as promising materials for gas-sensing detection. In this paper, MOF-derived Fe2O3/ZnFe2O4 porous nanocomposites were prepared successfully by a solvothermal method. The consequences of scanning electron microscope (SEM) and transmission electron microscope (TEM) exhibit the MOF-derived Fe2O3 spindles are uniform and adhered by ZnFe2O4 nanoparticles. Through the analyses of X-ray photoelectron spectroscopy (XPS) line fitting, the ZIF-8 has been translated into ZnFe2O4 on the surface of Fe2O3 spindles after calcination process and the specific surface area of Fe2O3/ZnFe2O4 nanocomposites is 41.7 m(2)/g, which is beneficial for the gas diffusion. With respect to the gas sensing text, the sensing performance of Fe2O3/ZnFe2O4 nanocomposites is superior to pure Fe2O3 spindles. Particularly, gas sensors prepared by Fe2O3/ZnFe2O4 nanocomposites can detect 200 ppb triethylamine (TEA) and the value of sensing response is 2.44. Therefore, the MOF-derived Fe2O3/ZnFe2O4 nanocomposite is a promising sensing material.