Abstract
AlPO(4)-5 with an AFI topology membrane on an a-alumina substrate has been fabricated continuously, without defects, and with high intergrowth. By using traditional hydrothermal methods in diluted mother liquor, an AlPO(4)-5 membrane has been produced by a simple second growth synthesis. Scanning electron microscopy (SEM) revealed no defects in the prepared supporting film, and X-ray (XRD) diffraction confirmed the layer of molecular sieve AlPO(4)-5 on the porous support of α-alumina. In this study, various synthesis parameters were systematically examined. Based on H(2), He, N(2), CO(2), and SF(6) permeance results, the supported membranes display Knudsen diffusion behavior, and the membrane's pervaporation properties of organic compounds (n-hexane, o-xylene, and TIPB) show minimized defects, verifying their high quality.