Abstract
One-dimensional MCM-48 mesoporous silica materials were successfully synthesized by a colloid electrospinning method combined with subsequent heat treatment. The structures were characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy and N2 adsorption–desorption. The results revealed that the fibers were made up of MCM-48 mesoporous silica nanoparticles with diameters of 100–150 nm. The fibers kept the 3D ordered mesoporous structure of MCM-48 nanoparticles. The humidity sensors based on the as-synthetized materials exhibited good linearity, small hysteresis and rapid response–recovery time. The possible mechanism of the difference in humidity sensing performance was discussed through the complex impedance plots.
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