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CeO/CuO/AlO catalyst has attracted considerable attention due to its higher activity and better selectivity at lower reaction temperature in comparison with commercial catalysts, and it has exhibited potential applications in water gas shift reaction and exhaust gas treatment. In this paper, the continuous CeO/CuO/AlO ultrafine fibers were prepared by electro-blown spinning method followed by a calcination process. The as-spun fibers were formed with solvent evaporation under the drawing of air flow and electrostatic force. The diameters of fibers could be regulated by changing the parameters, such as PVP content, gas pressure, voltage and injection rate, etc. These fibers could be subsequently converted into CeO/CuO/AlO ultrafine fibers via calcination in air at 400 °C. The presence of AlO made the more flexibility of CeO/CuO/AlO fibers and well inhibited the crystal growth of CeO and CuO during the calcination process. Most importantly, CuO could be highly dispersed into CeO, which provide a higher content of surface oxygen vacancies and should empirically benefit the catalytic process. Therefore, CeO/CuO/AlO composite fibers exhibited the excellent catalytic efficiency in dye degradation, and the utilization efficiency of solar light was effectively enhanced by the loading CuO into the materials. In addition, the mass production of CeO/CuO/AlO ultrafine fiber catalysts might be realized by this novel method. [ABSTRACT FROM AUTHOR]

In this paper, flexible mesoporous Si-doped Al 2 O 3 ultrafine fibers were successfully prepared by electro-blow spinning (EBS) technology followed by a calcination process. The effects of spinning parameters, including air pressure, voltage, and solution injection rate on the morphology and diameter of fibers were investigated. The results showed that the spinning parameters played a key role on determining the morphology and diameter of fibers, and the specific surface area of fibers significantly increased with the increasing content of pore forming agents (polytetrafluoroethylene, PTFE), at the same time the pore size distribution was mainly concentrated at ~5 nm. Most importantly, Si(OC 2 H 5 ) 4 was introduced to act as the flexible regulator which could inhibit the growth of alumina crystal, decrease the crystal size, and thus the flexibility of obtained mesoporous Si-doped Al 2 O 3 ultrafine fibers can be improved. Moreover, the fibers productivity by EBS method was higher than that of traditional electro-spinning. In the future, the mesoporous Si-doped Al 2 O 3 ultrafine fibers may perform desired function and spread their applications in different areas. [ABSTRACT FROM AUTHOR]