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Facile fabrication of Ce/V modified multi-channels TiO2 nanotubes and their enhanced selective catalytic reduction performance.

To optimize one-dimensional (1D) TiO2 nanofibers, a tailor-made multi-channels TiO2 nanotube has been successfully fabricated by electrospinning technology. After loading with Ce and V, the CeVTi-tube catalyst exhibited broad working temperature window and acceptable resistance to H2O and SO2 for elimination of NOx. Corresponding analysis revealed that the multi-channels structure provided more surface adsorbed oxygen species, and the wall of nanotube anchored active components efficiently, which was beneficial to improve the stability as well as dispersion of the active components. Besides, synergistic effect between Ce and V easily occurred at the CeVTi-tube catalyst, and its reducibility was significantly improved since the electron transformation between Ce and V dramatically enhanced. Consequently, the tailor-made multi-channels CeVTi-tube catalyst exhibited satisfied de-NOx efficiency at the temperature range of 220-460 °C. It seemed that the multi-channels TiO2 nanotube has great potential as an excellent carrier for SCR catalysts' designing.