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Porous CeO 2 /CuO/Al 2 O 3 fibers were successfully prepared, for the first time by electro-blown spinning method. The size of fibers diameter and the number of pores on fibers surface could be controlled by adjusting spinning parameters. The composite fibers showed continuous line feature and porous morphologies after heat treatment. To obtain the optimum spinning parameters, the effects of polyvinyl pyrrolidone (PVP) concentrations, air pressures, high voltages, injection rates, polytetrafluoroethylene (PTFE) contents and calcination temperatures were investigated. The morphologies and structures of the CeO 2 /CuO/Al 2 O 3 fibers were investigated by Scanning electron microscopy (SEM), Energy dispersive spectrometer (EDS) and X-ray diffraction (XRD). This novel electro-blown spinning method may realize the industrialized production of high performance ceramics fibers. [ABSTRACT FROM AUTHOR]

A novel method for fabricating highly ordered porous anodic alumina (PAA) with continuously tunable interpore distance using phosphoric/oxalic acid mixed electrolyte was presented. PAA films with different pore diameters and interpore distances were fabricated by changing anodizing potential and concentration of oxalic acid, characterized by field emission scanning electron microscope (FESEM). Experimental results showed oxalic acid in mixed electrolyte could not only suppress the breakdown of PAA at high potential but also enlarge the continuously tunable interpore distance from 300 to 500 nm. The proportionality constant between interpore distance and anodizing potential is 2.48 at the potential from 180 to 200 V, 2.31 at the potential from 130 to 170 V. The optimal content of oxalic acid and potential has a second power function relationship. Our results could extend the applications of PAA templates in ordered nano-material fabrication field. [ABSTRACT FROM AUTHOR]