writer：T. Y. Zhao, Z. Y. Liu, K. Nakata, S. Nishimoto, T. Murakami, Y. Zhao*, L. Jiang, A. Fujishima*
keywords：electrospinning, nanofibers, TiO2, photocatalysis, hollow structure
source：期刊
specific source：J. Mater. Chem., 2010, DOI: 10.1039/c0jm00484g
Issue time：2010年

This work describes that the photocatalytic activity of microsized TiO₂ fibers for degrading gaseous acetaldehyde can be systematically enhanced by introducing nanostructured interior hollow channels, which is achieved by a facile multifluidic electrospinning method. The increased channel number augments the BET surface area of TiO₂ fibers intuitively. A quite interesting phenomenon is that the percentage increase for photocatalytic activity is higher than that for surface area. It is thus proposed that the multichannel hollow structures induce not only an inner trap effect on gaseous molecules, but also a multiple-reflection effect on incident light, which further improves the photocatalytic activity of TiO₂ hollow fibers.