Synthesis of Novel Micro- and Mesoporous Zeolite Nanostructures Using Electrospinning Techniques

摘要

Micro- and mesoporous nanostructured zeolites are fabricated for rapidly responding,selective detection of individual gases in a multigas environment.These nanostructures are synthesized by an electrospinning technique wherein the process parameters are varied through a design of experiment (DoE) methodology.Various morphologies,namely,high aspect ratio nanofibers,nano-particles,and mixed microstructures,were obtained at different DoE variable settings.The zeolites of interest in this paper are silica and silicalite,wherein the aluminum content is zero.In the case of mesoporous silica,the sol-gel solution consisting of the silica source and the structure-directing agent is directly electrospun to obtain the nanostructured material on a device substrate.The structure-directing agent is later removed by calcination to obtain the porous nanostructures.In the case of microporous silica,the nanostructured silica is first synthesized and then co-electrospun with a polymer to obtain the desired nanostructure.The structure-directing agent and polymer are later removed by calcination.